CA1185502A - High pressure parts washer - Google Patents
High pressure parts washerInfo
- Publication number
- CA1185502A CA1185502A CA000396350A CA396350A CA1185502A CA 1185502 A CA1185502 A CA 1185502A CA 000396350 A CA000396350 A CA 000396350A CA 396350 A CA396350 A CA 396350A CA 1185502 A CA1185502 A CA 1185502A
- Authority
- CA
- Canada
- Prior art keywords
- liquid
- path
- spray
- atmosphere
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/006—Cabinets or cupboards specially adapted for cleaning articles by hand
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
- B08B15/026—Boxes for removal of dirt, e.g. for cleaning brakes, glove- boxes
Abstract
HIGH PRESSURE PARTS WASHER
ABSTRACT OF THE DISCLOSURE
High pressure parts washer having a hand directed spray nozzle, and an enclosing chamber containing the parts in a manner whereby the spraying zone for solvent, with which the parts are sprayed by the nozzle, is closely confined within the enclosure so as not to expose the operator or the outside environment to the liquid runoff of the solvent, or to the sprayed particles thereof, or to solvent steam or rising vapors. With a view to ecology considerations, and in addition to the concern to confine the contaminant from escaping into the environment, the internal atmosphere of the chamber and all solvent are continually recycled for re-use by the washer.
ABSTRACT OF THE DISCLOSURE
High pressure parts washer having a hand directed spray nozzle, and an enclosing chamber containing the parts in a manner whereby the spraying zone for solvent, with which the parts are sprayed by the nozzle, is closely confined within the enclosure so as not to expose the operator or the outside environment to the liquid runoff of the solvent, or to the sprayed particles thereof, or to solvent steam or rising vapors. With a view to ecology considerations, and in addition to the concern to confine the contaminant from escaping into the environment, the internal atmosphere of the chamber and all solvent are continually recycled for re-use by the washer.
Description
SPECI~ICATION
This invention xelates to a cleaning machine employing a high pressure liquid spray of solvent. It relates more particularly to a high pressure parts washer having a hand directed spray noæzle, and an enclosing chamber containing the parts in a manner whereby the spraying zone in which the parts are sprayed by the nozzle i5 closely confined wi~hin the enclosure so as not to expose the operator or the outside environment to the liquid runo~ o~ the solvent, or to the sprayed particles thereof, or to solvent steam or rising vapors. The internal atmosphere of the chamber is restricted l;hereby to its same closed confines as the spraying zone, such that preventing e~cape of both atmosphere and solvent enables recovery of all o~ the atmosphe~e and all of the solvent so as to be continually recycled and re-used, without being lost to some extent to the outside and, undesirably so, introducing thereto contamination t:o t}lat extent.
~ .~he concern to prevent atmo.spheric and other onv.i.ro~mental pollution and to conserve natural resources by contin-lal re-~use of the internal atmosphere and all solvent is ~0 especially important because of ecology considerations~
Machines utilized by repair men who frequently wash parts, an automobile mechanic ~or example, have generally provided according to practice in the past, an open ~ront ~or his ready accessibility with his washing, also a hand brush, and a slow running, steady, solid, large stream usually of a petroleum solvent with which he rinses o~ a part a~ter brushing, i~ necessary. The rinse~o~f is manual, accomp.lished by directing a hose-carried hand nozzle provided on the parts washer, and the rinse solvent is continually filtered and admitted to a pump on the machine for constant re-use by being recirculated back to the hand nozzle. By reason of convenience and expedience, it is therefore the practice for the repair man to wash parts openly in the washer and usually bare-handed, and in no way protecting his skin sur~aces, clothing, and breathing from the drawback or direct exposure to solvent stream, splash, and air-borne fumes, and in no way protecting outside surroundings to the washer from that same drawback.
It is an object of the present washer invention to materially reduce or substantially eliminate the foregoing drawback, and other disadvantages of parts washers as just described.
0~ lesser analogy to these parts washers ~or repair men's use, some background patents which can be noted include, along with the pt~lication Abstract Number PCT/CFI80/OG029 priority date 3/26/79 pt~lished 10/2/80 disclosing a washer for hands with air recirculation of relevance, a certain US patent no.
~,170,4~8 disclo~ing a continuous parts washer with cleaner and air recycling o~ relevance, and especially US patent no~
This invention xelates to a cleaning machine employing a high pressure liquid spray of solvent. It relates more particularly to a high pressure parts washer having a hand directed spray noæzle, and an enclosing chamber containing the parts in a manner whereby the spraying zone in which the parts are sprayed by the nozzle i5 closely confined wi~hin the enclosure so as not to expose the operator or the outside environment to the liquid runo~ o~ the solvent, or to the sprayed particles thereof, or to solvent steam or rising vapors. The internal atmosphere of the chamber is restricted l;hereby to its same closed confines as the spraying zone, such that preventing e~cape of both atmosphere and solvent enables recovery of all o~ the atmosphe~e and all of the solvent so as to be continually recycled and re-used, without being lost to some extent to the outside and, undesirably so, introducing thereto contamination t:o t}lat extent.
~ .~he concern to prevent atmo.spheric and other onv.i.ro~mental pollution and to conserve natural resources by contin-lal re-~use of the internal atmosphere and all solvent is ~0 especially important because of ecology considerations~
Machines utilized by repair men who frequently wash parts, an automobile mechanic ~or example, have generally provided according to practice in the past, an open ~ront ~or his ready accessibility with his washing, also a hand brush, and a slow running, steady, solid, large stream usually of a petroleum solvent with which he rinses o~ a part a~ter brushing, i~ necessary. The rinse~o~f is manual, accomp.lished by directing a hose-carried hand nozzle provided on the parts washer, and the rinse solvent is continually filtered and admitted to a pump on the machine for constant re-use by being recirculated back to the hand nozzle. By reason of convenience and expedience, it is therefore the practice for the repair man to wash parts openly in the washer and usually bare-handed, and in no way protecting his skin sur~aces, clothing, and breathing from the drawback or direct exposure to solvent stream, splash, and air-borne fumes, and in no way protecting outside surroundings to the washer from that same drawback.
It is an object of the present washer invention to materially reduce or substantially eliminate the foregoing drawback, and other disadvantages of parts washers as just described.
0~ lesser analogy to these parts washers ~or repair men's use, some background patents which can be noted include, along with the pt~lication Abstract Number PCT/CFI80/OG029 priority date 3/26/79 pt~lished 10/2/80 disclosing a washer for hands with air recirculation of relevance, a certain US patent no.
~,170,4~8 disclo~ing a continuous parts washer with cleaner and air recycling o~ relevance, and especially US patent no~
2,797,530 disclosing a glalss-~ronted sluriator with glove box gloves, a blast gun nozzle, and an air blower of relevance.
It is another object, in connection with the air path ~ollowed by the chamher atmosphere's closed cycle and with the liquid path ~ollowed by the solvent's closed cycle, ~or the two paths to have a common portion beginning intermediate the nozzle and the part to be spray cleaned, completely enclosed by the enclosure with substantially complete integrity, and accommodatin~ crossover o~ solvent vapor ~rom the liquid path into the air path of the chamber atmosphere. The vapor, in joining the air path, is entrained in the moving air.
An additional o~ject, in line t:h the immediately preceding objective, is that the atmosphere's closed cycle path is provided as a blower-forced path of recir-culation ~or recyclin~ the internal air of the chamber and including a vapor to-liquid agglomerating filter on the upstream side of the internal air blower which admits, separates from its atmospheric entrainment, and agglomerates as a liquid, the crossover vapor.
A further object, in line with the foregoing objectives, is that the solvent's closed cycle path is provided as a pump-forced path of recirculation for recycling all solvent runoff as ultimately rejoined by the liquid agglomerate.
Another object, in line with the above objective of a blower-forced path and more particularly with how it is produced, is the provision of a blower~recirculated atmosphere recyclinc~ circuit leffective to limit and dilute the vapor to a reduced concen!tration by vapor-to-li~uid agglomerat.ion thereof in the Filter and by reintroduction of the vapor-ridded air, when recycled, for continued -ircu:Lation wi~hin the closed confines of the spray chamber.
It is an additional o~ect, in line with the immediately preceding objective of the blower recirculated atmosphere recycling circuit, to provide a blower tower containing the air-forcing blower, and having an inlet and outlet arranged with the filter in the inlet; a recycled-air deflector provided in the outlet and a viewing window provided in the chamber establish cooperation to aid the eye o~ the mechanic by the cleflector directing the forced-pressure re-introduced, de-saturated recycled air in a path sweeping across the window on its inside surface, to prevent fog~ing from any solvent vapor which might otherwise deposit itself on th~ glass surface.
5~V~ 4 Another objeck is to provide, between the chamker continually discharging solvent runof and a usual solvent collecting tank communicating by drain from the chamber, a heat-actuated plug sensitive to the solvent being set afire in the chamber to thereupon automatically block the drain and seal of the tank of solvent from further communication with the chamber.
A further object is for the washer hereof to comprise a vertically disposed stand, and a washing machine proper arranged atop the stand with the machine's floor pan supported thereon, the arrangement being such that ~eet provided on the stand afford a ~loor adjustment placing the stand a desired amount out o true vertical so that the floor pan in the washing machine stays just atilt enough for rapid runo~f o~
solvent therefrom with no chance o~ accumulation in case t.he solvent is ignited .in the spray chamber o~ the machine.
Further eatures, objects, and advantages will either be specifically pointed out or becoma apparent when, or a better understanding o~ my invention, re~ercnce is made to the following description taken in conjunction with the accompanyin~ drawings which show certain preferred embodiments thereof and in which:
FIGURE 1 is an isometric view o the washer as ~ully assembled, with a 100r stand therefor and a cleaning machine atop the ~tand and embodying the blower tower thereof and other principles o the present invention;
FIGURE 2 is a section, in plan view, of the machine's 100r pan as taken along the section line 2 -2 of Fiyure :L;
FIGURES 3 and 4 are cross sectional views ~ 5 in front elevation of the floor pan as ~aken along the section lines 3--3 and 4--4, respectively, o~ Figure 2, FIGURE 5 is a cross sectional, frc,nt eleva-tional detail showing the blower tower as taken along the section line 5- 5 o~ Figure 1, appearing with Figures 1, 2, 3, and 6;
FIGURE 6 is an elevational face view of the inlet filter carried by the blower towerO as viewed in the direction indicatecl by the section line arrows 6-;6 in Figure 5, appearing with Figures 1, 2, 3, and 5;
FIGURE 7 is similar to ~igure 5, ~ut is ur-ther supplemented with schemat.ic additions indicating solvent spray crossover JOining the closed path of circulation of air by the blower tower, and indicating agglomerate crossover joining the closed path o~ pumped solvent circulation as soon as the air patll 103es it.s entrained vapor being riltered out and agglomerated in thQ tower;
E'IGURE 8 is similar to Figure 6, additionally thexeto showin~ a modification of the invention in more complete detail and bein~ supplemented ~or further details by FIGURE 9 as tak-en along the diagonal cross sectional lines 9--9 in Figure 8; ancl FIGURE 10 is sirnilar to Figure 2, additionally thereto showing a modification of the invention in more complete detail and being supplemented for f-lrther details by FIGURE 11 in front ~levation as taken along the section line 11--11 in Figure 10.
More particularly in the drawings, a high pressure washer 10 is .shown in Figure 1 hav,ing a floor stand 11 supported on four legs 12, 14, 16, and 18 and supporti.ng the machine 20 for cleaning parts. The machine has a six-sided, vapor confining cabinet 22 affording a fully enclosed spray chamber 24 kherein and including, along with the spacecl apart sealed top wall 26 and floor pan wall 28, a continuous ser.ies 5~
of side walls 30, 32, 34, and 36 joining same for totally confining the air contents contained by the chamber 24.
The top wall, numbered 26, carries a light fixture 38 equipped with a straight ~luorescent tube so the operator can illuminate the worX in ~he chamber 24. A window inset o~ Plexiglas or plate or window glass 40 set at a console angLe in the top wall 26 gives the operator a clear view inside.
A high pressure hose 42 which passes through the inside of the chamber 24 is secured at about the middle of the underside of the top wall 26 so as to supply a spray nozzle 44 carried at a free swinging, depending terminal portion 46 of the hose 42.
The wall at the front side, numbered 30, con~ists of a sealed door secured by a horizontally disposed piano hinge 48 at the top edge 50 as to open outwardly and upwardly to admit work to tthe chamber 24. A door handle 50 at tthe bottom controls a lock carried by the door to keep it t.ight against the door opening seals when closed~ Left and right, leak-proof glove box gloves 52 and S~ ar~ in the chamber sealed to tthe inside of hand holes 56 and 58 in the d~or allowing the operator access for his hands and forearms into the chamber 2~ The operator keeps completely dry because of the door and because o~ the sealed off, impervious gloves 52 and 54 he is actually ~orced to wear.
The side wall numbered 36, being at tne right end of the cabinet 22 as viewed in Figure 1, carries on the outside at the top an electrical blower motor 60 and, on the inside startiny at the top, carries a vertically disposed blower tower 62. 'llhe t:ower 62 affords continuous internal circula-tion of the chamher atmosphere, and it reintroduces the atmosphere by discharging same into the cha~er downwardly and laterally ~ 7 through deflector vanes 64 in a side outlet 66 at the bottom of the tower.
The stand legs 1~, 14, 16r and 18 support, at a slight distance above the floor, a generally horizontal base platform 68. The platform 68 has bolted thereto a switch-operated electric motor 70 and a driven, high pressure pump 72 connected thereto by a V-belt drive 74~ The motor 70 is operated by a switch pedal 76 which frees the hands of the operator by affording him ~oot control to start and stop the spray cleaning operation.
More speci~ically, a high pressure conduit 78 interconnects the outlet of the pump 72 and a hose fitting to the spra~ nozzle hose 42 positioned in chamber 24 and, after the operator directs the nozzle 44 at a part to be cleaned, he presses down on the switch pedal 76 and the noæzle starts spraying.
In some applications contemplated, the pump can draw cleaning liquid from a plastic re~ervoir tank carried by the ba~e platform 68. As illustrated in Figure 1 however, a reservoir tank 80 ~or the li~uid is shown independently carri.ed in the upper part of the floor stand on a level spaced at all points a predetermined safe distance below the bottom of the floor pan wall 2S which serves in closing of~ the bottom o~ the chamber 24. From a filter 82 supported within the tanlc 80, an interconnecting suction conduit 84 leads to the inlet side o~ the pump 72.
A multipart drain line structure 86 which will be hereina~ter described in detail interconnects the reservoir tank 80 and the floor pan wall 28 for handling the drainage from the latter, now to be e~plained. Each o~ the legs on the stand 11, such as the right front leg 12 which is typical, stands on a -threadedly adjustable foot 88; then according to installation instructions ccnt~~~mplated to be furni~hed with each washer, the foot 88 is slightly extended to make leg 12 slightly the longest, whereas legs 1~ and 18 are made somewhat shorter and the diagon~ ly opposite le~t rcar leg 16 becomes the shortest, all solidly on a level floor.
FLOOR P~N DRAIN~GE -- FIGURES 2, 3 The unequal adjustment just described of the legs of the floor stand 11, though hardly perceptible to the eye, produces a definite slope to the floor pan wall 28 from a high point at the right front corner 90 down to the low point 92 in the left rear corner which will be seen in these figures to bP
occupied by the drain line strllcture fragmentarily appearing at 86. Consequently, some portions o~ the liquid runoff will drain alongside the walls rectilinearly in the direction of thc respective right angle arrows 94 and 96, whereas the major 10w will be diagonally across the pan in the direction of the arrow 98, all without allowi.ng runo.f~ to puddle or otherwise accumulate ~ut instead to immediately drain ~rom the pan.
The comparatively extended adjustment ill.ustrated in Pigure 1 at 88 presumes a level floor benea-th the ~loor stand 11 and is somewhat exaggerated as shown; however, the feet for all legs provide a considerable range of longitudinal adjustment so khat on uneven flooring the leg 12 is e~fectively the longest from the level standpoint. The true horizontal plane appears at 100 in Figure 3, out of which the canted wall 28 is shown upwardly tilted as evidenced by the right front corner 90 being in the desired way at the high point for good, gravity directed runoff.
~ORCED LIQUID CIRCUL~TION -- FIGURE 4 In their locations on opposite vertical sides of the air space 102 by which they are kept forcibly separated, the chamber 24 at the bottom is maintained sealed apart by the wall 28 and the reservoir chamber 104 at the top is maintained sealed apart by the impervious reservoir cover 106. A fill opening cap 108 tightly closes off a fill opening in the cover and a drain plug 110 tightly closes off a drain opening in the bottom wall of the reservoir 80.
In structure 86, a drain trap 112 is provided therefor of ~amiliar plumbing U~shape; in the usual way, the trap holds itselE continually full of li~uid. At the lowest ba~e point in the bend therein, the trap 112 has a depending vertical extension 114 which, when unplugged as provided for at the bottom, allows metal chips and an accumulation of grit and other particles which sink down out o~ the liquid to be p~riodically removed from the liquid system.
Connected to the upstanding legs of the drain trap 112 at opposed points both above the liquid level, a tan~
vent 116 provided with small diameter restrictions at opposite ends hridges across the top of the trap 112. No wire mesh or other screening is required for its function as a fire barrier becaus-s of equal effectiveness of -the smallness of tandem restrictions in that function; 50 the interior of the reservoir chamber 104 readily vents off any accumulated vapor or pressure into and up and out of the throat 118 of the drain line structure 86. The thus bypassed drain trap 112 conducts the flow of liquid only, and only in the direction of the reservoir tank 80 in which i5 iS kept in storage available to be pumped out.
A drain plug arm 120 is supported on the _ 9 _ ~ ~5~ o end wall 32 by a pivot hracket 122 for pivoting be-tween an upstanding position, not shown, and a limiting horizontal position which as illustrated overlies the mouth of the drain line structure 85. A drain plug 124 suspended in spaced apart relation within the mouth much like an unseated poppet valve is connected at the top by a heat ~usible link 126 to the arm 120 for support. The drain pluy 124 is connected at the bottom by a highly stretchable tension spring 128 to a strainer basket 130 detachably secured inside ~he throat of the drain line structure 86.
Raising the arm 120 upwardly on its pivot bracket 122 will cause the spring 120 to stretch sufficiently that it can be u~looked at either the end connected to the ~trainer basket 130 which ordinarily stays in place or the end connected to the plug 124 being withdrawn from the mouth of the drain~ Made acces~ible in this w~y, the basket 130 can be detached, ~rom where secured in the throat, and then emptied.
The basket 130 strains out only the largest particles and the normal suspende~ position o~ the plug 124 allows space all around for the 'argest particles to pass into the mouth o~
the drain line structure 86.
All liquid which the pump 72 causes to be discharg~d by the nozzle 44 eventually makes its way back from the chamber 24, thence through the drain structure 86, and into storage in the tank 80 so as to be av~ilable again ~or the pump 7 2 .
FORCED INTERNAL ATMOSPHERE CIRCUI~TION ~- FIGURES 5, 6 A wire grille 132 covers the inlet 13~
to the tower 62 which, on the inlet's outer side, carries a liquid agglomerating ilter 136 behind the grille 132 and which, on the inlet's inner side, carries the col~unicating tower scroll housing 138 containing the blower rotor cage 140. A motor shaft 142 passing f.rom the blower motor 60 through a shaft seal 144 in wall 36 supports the blower cage 140 for high speed rotation causing the internal atmosphere of the spray chamber to be drawn through the filter 136 in the inlet 134 i.n the d-;rection indicated by a suction arrow and then be forced down the blower ~ower 62 in ~he vertical direction of the arrows shown therein.
Cleaning~ uid fog is extracted from th~
chamber's internal atmosphere by the agglomerating ~ilter 136, a good part of the thus separated li~uid in the ~ilter agglomerates as droplets or drops in a drip hole 146 at the bottom o~ the ~ilter 136 so as to fall in the char~er in a side path it takes which I indicate genexally at 148 and which I shall designate the 2cl crossover path.
The remainder of the agglomerate spills out the ~ace o~ the filter 136 on the inner side so as to go down th6! inside o~ the blower tower 62 in a 3d crossover path generally indicated ak lSO, either by free all as drops or droplets or by dripping or running down along the inside wall of the tower and out. through a drip hole.
Although the just preceding discussion o air-blowar forced circulation was presented separately and independently from a prior appearing discussion of pump forced liquid circulation, the string0ntly confined paths of these two closed circula-tion systems establish cooperation and have three common portions contained wi-thin -the con~ines of tha spray chamber 24. The essentially air-tight integrity o the surroundiny cabinet fregmentarily shown. in Figure 7 at 22 will insure a leak-~ree internal air path schematically indicated at 152 and a leak ~ree liquid path s~hematically fragmentarily indicated at 154.
EIigh pressure pump spray 156 along path 154 can be selectively directed by the gloved hands o~ the operator at the work W supported in the chamber 24, for example, directed at the housing of an automotive power steering pump requiring gr.it and grime and an oily film to be stripped off. The cleaning liquid runoff 158 along sloping path 154 carries with it the impact~dislodged grit and grime plus the solute therein from the clinging oil and dirt film dissolved by the liquid off the work W.
Splash and splatter of the extremely fast moving spray particles being stopped by the work W produces con-tinuous mist from the cleaning liquid which, in a common portion of travel shared by the circulating liquid and air, transfers as a ~og in a 1st crossover path 160 into ent.rainment in the chamber's ciLculating internal atmosphere.
Simultaneously, continuous agglomerate being recovered by the filter 136 is in part following the 2d crossover path 148 and in part following the 3d crossover path so that the two parts can combine and together be reunited with their parent stream of liquid runoff 158 at a floor pan junc-ture schematically appearing at 162. This common portion of trav-el shared by the circulating liquid anci air makes possible the complete return for re-use of all cleaning liquid applied, and as one body it enters and pours down the dra.in line structure 86.
In the ordinary case, the continual stripping, by filtration, of the rising mist from the air almost as soon as it forms therein never allows the vapor concentration to run V ~
high enough ~or fogging over the operator's viewing glass 40 in the console, not shown. ~owever, problem cases can arise where a hotter cleaning spray is desired or where the cleaning liquid employed has, even without heating, an inherently high vapor pressure. Further means of preventing fogging are provided in the practice of my invention.
MODIFIED EMBODIMENT -- FIGURES 8,9 Illustrative of one such means is the modi~ied embodiment of the invention as shown in these figures.
Within the environment of the machine 20 already described and equipped with a floor stand 11, the modification occurring is made to the blower tower 62a to enable the machine to perform with normal effectiveness even under the most stringent operating condition of glass fogging. In place of being precisely vertical as before, the tower 62a as it runs alongside end wall 36 could be more properly des~cribed as horizontal, in its generally diagonal disposition as it extends forwardly toward its outlet 66 near the front right side of the machine. The tower 62a thus lies essentially in the vertical plane containing the right edge of the glass 40, being below that edge and spaced parallel thereto and to the plane of the glass. The agglomerate drip follows, as before, the 2d and 3d respective crossover paths 148 and 150.
The outlet 66 and glass 40 are essentially transversely aligned across the width dimension of the machine, and the generally horizontally disposed louvers or vanes 64 are angled in the outlet for a slight nozzle uptilt direction to discharge the vapor-ridded air from the outlet 66 onto and then alongside the inner face of the glass 40. Although the scouring effect is akin to action expected from an automotive defogging and defrosting nozzle, the effect is moreso here ~ g~ 14 because the leaning-liquid og-removal in this instance changes the actual character of the air being blown which has been ridded of its fog contents. So the glass surface is being dried by the scrubbing hereof with a forced blanket o~ drying air, as well as being air-curtained o~f from having a stagnant layer o~ foggy air moving in and misting up the undersideO
CLEANING I,IQUID
Cleaning li~uids o~ a wide assortment are satisfactory ~or use in the present machine, and they commercially vary in composition according to the character of the industry in which they are utilized. Low bubbling soap solutions can be e~fectively applied by the machine to the various parts re-quiring washing. In the bakery industry, for example, a low sudsing, heated detergent solution under the strong spraying pow-er hereof can readily scour o~f the baking pans; i~ need be, an electric heating coil can be installed in the xeservoir tank o~ the machine to keep the solution warmed to the desi.red wash temperature at all times.
In preferred use o~ the machine which is as a parts washer ~ound so convenient to garage and other mechanics, a regulax parts washer liquid will be employed usually consisting of a petroleum based cleaning solvent. It is essential that the petroleurn constituent have a high flash point, and a value o~
104 F and higher is not uncommon in the petroleum solvents ~ound in washers in the usual service and machine shops and repair garages. In many such shops and garages the brand used currently and ~ound altogether acceptable is Stoddard petroleum solvent rnade by Safety-Kleen Company. Another suitable brand, ma~e available throughout many i~ not most states within continental USA by the Distributor W. W. Grainger, Chicago, IIlinois, is Graymills Super Agi~ene cleaning solvent. All such in my machine ha-~e the tendency under the impetus of the high pressure impact to create a "wet" atmosphere, which is the problem confronted with petroleum solvents and surmounted herein. And of course it is no solution to the problem to allow positive internal air pressure to develop because of fume problerns; the presen~ machine never develops pressure inside and hence has no tendency to force fumes out in the air.
In other words in non-analagous devices, such as transpires in air blast, sand blast, and water blast machines as the machine continues in periods of operation, the air or sand or water admitted continues to increase as a displacing volu~lle inside, inevitably building up pressure therein which makes its way directly to the outside. As already no-ted in connection with the instant parts washer, solvent emitted by the spray nozzle then goes through one path or another eventually aLl to return to the pump for recirculation. And all air drawn into the hl~wer tower inlet is, upon dryiny, immediately there-after readmitted in total back into khe spray chamber whence it came. There is no net gain and no net loss in volume, and hence nothing to give xise to an internal pressure buildup which will expel fumes.
AIR FILTER
The ~pecifications for the agglomerating filter are not rigid in the least; it works to ~ull effectiveness as soon as all surfaces are wetted by the liquid and in one satisfactory working form was a ~" thick, 5" diameter cl05ely knit pad of thin, chemically inert fibrejs. The film on the fully wetted surface areas thereof is continually fed by the impacting fog particles.
Fiberglas fiber is suitable for the knit pad ~ 16 material ar~d so is zinc coated steel mesh, particularly when a petroleum solvent solution is being filtered out. For better efficiency the thickness can be increased to ~", and further satisfactory materials include foam rubber, paper filter material such as found in the air intake cleaner and silencer for automobiles, foam polyurethane material, and aluminum fine mesh.
OPE~ATION
As an example o~ the level o~ operating pressure I am referring to as a high pressure operation, -the pump discharges at 1,100 psi in one generally satisfactory embodiment which has been built o~ the invention. In the main, pumps matched in capacity and outlet pressure to the nozzle to he employed would discharge in the broad range of 500 psi to 2,000 psi, whereas the preferred operating range for pressure delivered to the nozzle would be somewhere approximately from 1,000 psi to 1,500 psi~ The glove box gloves loom as especially attractive built in at~:achments because o~ these exceptionally high nozzle velocities which result, as compared for example with so-called flushing machines ~or cleaning in which the advertised pressure on the nozæle has a stated range o 400psi to 600 psi.
Because of the stripping effect of solvent herein under a discharge pressure o~ 1,100 psi, for example, no brushing is ordinarily required; with the part in or at least manipulated by one gloved hand and the nozzle in the other, the operator exposes the interior and exterior surfaces of the part to direct force of the spray so as to dislodge the loose and clirlging matter and dissolve deposited layers, films, and coats such as lubricant of which the part is to be ridded~ Full force spraying will continue as long as the operator's ~oot presses the foot switch.
In a reversal of all steps of the foregoing procedure, the operator releases the foot switch, extricates his hands and forearms from the gloves, opens the door and, among other things, extricates the completely spray cleaned part. Additionally as I insist in my own operations, the part is then washed by hand in regular hot water and suds, rinsed o~f, and dried i~ a ball bearing, ~or example, the bearing thus carrying with it no residual film of petroleum solvent to interfere with the surfaces thereafter directly establishing intimate wetted con-tact with lu'bricant when being recoated for reinstallation.
~ lthough each and every one of machines coming o~ the production line embodying my invention may not be so perfectly sealed that no vapors can come out, such machines can generall~ 'be consi~ered as fume-tight if not literally so;
escapinc~ petroleum ~umes in heavy con~ration in the outside air will in circumstances render the solvent a fire hazard, not good to 'breathe, possibly explosive, and a problem because of coating things in buildings.
U~USUI~L CIRCI~MSTA~CES
I~, under such a remote possibility that it i~ difficult to imagine, the machine door happens -to be open when a flying spark or open flame or naked electrical spark happens about, the door under gravity will slam shut and relatch im-mediately it is released to close. So any accumulation of random vapors in the spray cham'ber which could ~ave ignited prior to door closure would promptly 'burn themselves out as the limited supply of chamber oxygen was exhausted because of the sealed of~ chamber being atmosphere-tight to the oxygen supply 1~
in the air outside. It is doubtful the liquid film or droplets on the interior surfaces could evaporate in the short period ensulng .
If, under an even more remote possibility, the circumstances were such that either the low concentration of solvent vapor in the chambar atmosphere or solvent liquid ~low in the chamber making its way expeditiously to drain were somehow to erupt in flames, right during a spraying operation, the fire could never spread beyond being a seal~d off internal one and would promptly snuff out. Four added factors would au-to-mati.cally or inharently contribute to the extinguishing of the ire as the internal supply of oxygen was fast being depleted.
~irst, the bl.ower tower would be removing spent combustion products and also solvent mist before it ever ignited, and the.n be pouriny back toward the fire in the chamber air carrying a mi.~ed-in heavy concentration o~ dry combustion products which would dilu~e the remaining air and tend to blanket and smother 1ames~ Second, the U-shaped drain trap would furnish a ~ira barrier at the top with the restricted vent thereacross, and require enough continuous oxygen so as to continuously brun out all solvent trapped down and around in the U; and otherwise, there is no path available for fire to reach the solvent reservoir tank spaced as it is safely below the floor pan of the chamber. Third, heat from combustion going on in the drain line throat below or in the chamber adjacent the mouth of the drain line would melt the ~usible link holding open the plug in the mouth; unopposed bias from the tension spriny connected to the bottom of the plug would snap the plug down shut, completely isolating the spray chamber and any avenua for the fire to escape and spread. Fourth, not only would oxygen 5~
and hiyhly diluted vapor be ex~remely scarce in their availability in the chamber, but also the rapid runoff being accomplished by the sloping floor pan would insure no pool or pocket of solvent could be present in the chamber to feed a fire. So the life of any such fire would be extremely short, and always confined within the sealed integrity of the system.
A pump particularly well suited to the practice of this invention has not only the characteristic of delivering the referred to continuous high pressure to the spray no~zle, but equally the characteristic of delivering a continuous high rate of flow as compared to the usual low capacity pumps of parts washers in general. In practice, a pump capacity of 3.5 gallons per minute continuously delivered under high pressure has proved satisfactory for the high rate, nozzle discharge velocities required herein. And it has been ~ound here that that volume of spray flow can ba altogether adequately supplied from a relatively moderately sized reservoir in a particular form of my invention, which is a preferred form for that reascn and will now be explained.
PRE~ERRED EMBODIMENT -- FIGURES lO, 11 In this embodimen~, the floor pan wall 28 is cut out at the center to form a laxge rectangular drain opening 164 and, at.the rectangular outer edges, is formed as a base tray carrying a continuous short upstanding flange 166.
The chamber side walls including the left end wall 32, the back side wall 34, and right end wall 36 join the floor pan wall 28 in tightly overlapping relation with ~he base tray flange 166 which is on t~le outside.
A continuous bracket 168 made of a Z-shaped metal strip overlaps with the entire underside edge of the rectangular drain opening 164 so as to form at an upper bracket .
, ~.
~ ~ ~ 5 ~?2 level a fixed shelf 170, or ledge, receiviny a rectangular removable work surface 172 which in e~ect completes the base tray and is in the plane thereof. The surrace 172 is presented by a me~l suppo~t plate formed with a pattern of regularly spaced apart, large perforations 174 therethrough~
At a lower bracket level the strip forms a continuous, slightly inwardly offset rectangular fixed s~elf 176 or ledge which complementarily receives the short, horizontal lateral supporting flange 178 of a close meshed, wire filter basket 180.
The work surface 172 presented ~y the support plate is useEul during the spray cleaning of a part. So the plate stays in place as illustrated while the operator has his hand~ and forearms working in the built-in gloves, not shown.
But when no spraying is going on, the support plate dves not always stay in the machine. It is usually but not necessarily removed in order to refill the tank 80a ~ollowing a draining and cleaning out upon removal of the drain cap 110.
The support plate is r~moved in order to lift out and empty the ~asket 180 o~ ccllected sludge, debris, trash, and other residue ~rcm the vigorous spray cleaning, as compared to the simple flushing o~ of parts by prior parks washers. Also the support plate is removed when the ~elvent level is high enough in tank 80a to immerse the basket li~0 and allow the machine to be used as a quiescent soak tank f~r parts.
SPECIFICATIONS AND OPERAT~ON ~- FIGURES 10, 11 In one physically constructed embodiment of the invention, thP base tray around the outside as delineated by the upright ~lange 166 had a rectangular measurement o~ 26" on the short side by 34" on the side across the width of -the machine.
... .
~.
~ 5 ~ ~ 21 The horizontal surfaces shown in plan view in Figure 10 were all level.
During spraying, the downflow capacity o~
the number of perforations 174 in aggregate over the entire area of the work surface 172 was more than adequate to drain off the 3.5 gpm runoff o~ solvent liquid; the side wall and bottom area or the filter basket 180 in total was more than equal to set~ling out the sludge and returning the solvent as filtered liquid to the res2rvoir 80a for re-p~ping. Upon each re-start of spraying, it was found that a mere residual volume of 5 yallons of solvent in the -tank 80a was sufficient both for the start-up and ~or the continual run of spraying sustained at 3.5 gpm.
The spray delivery rate o~ the embodiment as shown in Fiyures 10 and 11 has proved exceptionally high in the yeneral cl~ss of parts washers, despite its conskruction being at once simplified, compact, easily maintained, and ~airly ~oolprooE and stra.ightforward in operation. Brushing to dislodge caked-on oil, grease, grit, and grime is practically unheard of, and the force of impact of the spray jet does the effective surface stripping and scourin~ necessary. And, as previously indicated, the tight integrity of the spray chamber and rest of the system negates any problem of outleak o~ the mist coming off the spray jet impact area.
Variations within the spirit and scope of the invention described are equally comprehended by the foregoing description.
It is another object, in connection with the air path ~ollowed by the chamher atmosphere's closed cycle and with the liquid path ~ollowed by the solvent's closed cycle, ~or the two paths to have a common portion beginning intermediate the nozzle and the part to be spray cleaned, completely enclosed by the enclosure with substantially complete integrity, and accommodatin~ crossover o~ solvent vapor ~rom the liquid path into the air path of the chamber atmosphere. The vapor, in joining the air path, is entrained in the moving air.
An additional o~ject, in line t:h the immediately preceding objective, is that the atmosphere's closed cycle path is provided as a blower-forced path of recir-culation ~or recyclin~ the internal air of the chamber and including a vapor to-liquid agglomerating filter on the upstream side of the internal air blower which admits, separates from its atmospheric entrainment, and agglomerates as a liquid, the crossover vapor.
A further object, in line with the foregoing objectives, is that the solvent's closed cycle path is provided as a pump-forced path of recirculation for recycling all solvent runoff as ultimately rejoined by the liquid agglomerate.
Another object, in line with the above objective of a blower-forced path and more particularly with how it is produced, is the provision of a blower~recirculated atmosphere recyclinc~ circuit leffective to limit and dilute the vapor to a reduced concen!tration by vapor-to-li~uid agglomerat.ion thereof in the Filter and by reintroduction of the vapor-ridded air, when recycled, for continued -ircu:Lation wi~hin the closed confines of the spray chamber.
It is an additional o~ect, in line with the immediately preceding objective of the blower recirculated atmosphere recycling circuit, to provide a blower tower containing the air-forcing blower, and having an inlet and outlet arranged with the filter in the inlet; a recycled-air deflector provided in the outlet and a viewing window provided in the chamber establish cooperation to aid the eye o~ the mechanic by the cleflector directing the forced-pressure re-introduced, de-saturated recycled air in a path sweeping across the window on its inside surface, to prevent fog~ing from any solvent vapor which might otherwise deposit itself on th~ glass surface.
5~V~ 4 Another objeck is to provide, between the chamker continually discharging solvent runof and a usual solvent collecting tank communicating by drain from the chamber, a heat-actuated plug sensitive to the solvent being set afire in the chamber to thereupon automatically block the drain and seal of the tank of solvent from further communication with the chamber.
A further object is for the washer hereof to comprise a vertically disposed stand, and a washing machine proper arranged atop the stand with the machine's floor pan supported thereon, the arrangement being such that ~eet provided on the stand afford a ~loor adjustment placing the stand a desired amount out o true vertical so that the floor pan in the washing machine stays just atilt enough for rapid runo~f o~
solvent therefrom with no chance o~ accumulation in case t.he solvent is ignited .in the spray chamber o~ the machine.
Further eatures, objects, and advantages will either be specifically pointed out or becoma apparent when, or a better understanding o~ my invention, re~ercnce is made to the following description taken in conjunction with the accompanyin~ drawings which show certain preferred embodiments thereof and in which:
FIGURE 1 is an isometric view o the washer as ~ully assembled, with a 100r stand therefor and a cleaning machine atop the ~tand and embodying the blower tower thereof and other principles o the present invention;
FIGURE 2 is a section, in plan view, of the machine's 100r pan as taken along the section line 2 -2 of Fiyure :L;
FIGURES 3 and 4 are cross sectional views ~ 5 in front elevation of the floor pan as ~aken along the section lines 3--3 and 4--4, respectively, o~ Figure 2, FIGURE 5 is a cross sectional, frc,nt eleva-tional detail showing the blower tower as taken along the section line 5- 5 o~ Figure 1, appearing with Figures 1, 2, 3, and 6;
FIGURE 6 is an elevational face view of the inlet filter carried by the blower towerO as viewed in the direction indicatecl by the section line arrows 6-;6 in Figure 5, appearing with Figures 1, 2, 3, and 5;
FIGURE 7 is similar to ~igure 5, ~ut is ur-ther supplemented with schemat.ic additions indicating solvent spray crossover JOining the closed path of circulation of air by the blower tower, and indicating agglomerate crossover joining the closed path o~ pumped solvent circulation as soon as the air patll 103es it.s entrained vapor being riltered out and agglomerated in thQ tower;
E'IGURE 8 is similar to Figure 6, additionally thexeto showin~ a modification of the invention in more complete detail and bein~ supplemented ~or further details by FIGURE 9 as tak-en along the diagonal cross sectional lines 9--9 in Figure 8; ancl FIGURE 10 is sirnilar to Figure 2, additionally thereto showing a modification of the invention in more complete detail and being supplemented for f-lrther details by FIGURE 11 in front ~levation as taken along the section line 11--11 in Figure 10.
More particularly in the drawings, a high pressure washer 10 is .shown in Figure 1 hav,ing a floor stand 11 supported on four legs 12, 14, 16, and 18 and supporti.ng the machine 20 for cleaning parts. The machine has a six-sided, vapor confining cabinet 22 affording a fully enclosed spray chamber 24 kherein and including, along with the spacecl apart sealed top wall 26 and floor pan wall 28, a continuous ser.ies 5~
of side walls 30, 32, 34, and 36 joining same for totally confining the air contents contained by the chamber 24.
The top wall, numbered 26, carries a light fixture 38 equipped with a straight ~luorescent tube so the operator can illuminate the worX in ~he chamber 24. A window inset o~ Plexiglas or plate or window glass 40 set at a console angLe in the top wall 26 gives the operator a clear view inside.
A high pressure hose 42 which passes through the inside of the chamber 24 is secured at about the middle of the underside of the top wall 26 so as to supply a spray nozzle 44 carried at a free swinging, depending terminal portion 46 of the hose 42.
The wall at the front side, numbered 30, con~ists of a sealed door secured by a horizontally disposed piano hinge 48 at the top edge 50 as to open outwardly and upwardly to admit work to tthe chamber 24. A door handle 50 at tthe bottom controls a lock carried by the door to keep it t.ight against the door opening seals when closed~ Left and right, leak-proof glove box gloves 52 and S~ ar~ in the chamber sealed to tthe inside of hand holes 56 and 58 in the d~or allowing the operator access for his hands and forearms into the chamber 2~ The operator keeps completely dry because of the door and because o~ the sealed off, impervious gloves 52 and 54 he is actually ~orced to wear.
The side wall numbered 36, being at tne right end of the cabinet 22 as viewed in Figure 1, carries on the outside at the top an electrical blower motor 60 and, on the inside startiny at the top, carries a vertically disposed blower tower 62. 'llhe t:ower 62 affords continuous internal circula-tion of the chamher atmosphere, and it reintroduces the atmosphere by discharging same into the cha~er downwardly and laterally ~ 7 through deflector vanes 64 in a side outlet 66 at the bottom of the tower.
The stand legs 1~, 14, 16r and 18 support, at a slight distance above the floor, a generally horizontal base platform 68. The platform 68 has bolted thereto a switch-operated electric motor 70 and a driven, high pressure pump 72 connected thereto by a V-belt drive 74~ The motor 70 is operated by a switch pedal 76 which frees the hands of the operator by affording him ~oot control to start and stop the spray cleaning operation.
More speci~ically, a high pressure conduit 78 interconnects the outlet of the pump 72 and a hose fitting to the spra~ nozzle hose 42 positioned in chamber 24 and, after the operator directs the nozzle 44 at a part to be cleaned, he presses down on the switch pedal 76 and the noæzle starts spraying.
In some applications contemplated, the pump can draw cleaning liquid from a plastic re~ervoir tank carried by the ba~e platform 68. As illustrated in Figure 1 however, a reservoir tank 80 ~or the li~uid is shown independently carri.ed in the upper part of the floor stand on a level spaced at all points a predetermined safe distance below the bottom of the floor pan wall 2S which serves in closing of~ the bottom o~ the chamber 24. From a filter 82 supported within the tanlc 80, an interconnecting suction conduit 84 leads to the inlet side o~ the pump 72.
A multipart drain line structure 86 which will be hereina~ter described in detail interconnects the reservoir tank 80 and the floor pan wall 28 for handling the drainage from the latter, now to be e~plained. Each o~ the legs on the stand 11, such as the right front leg 12 which is typical, stands on a -threadedly adjustable foot 88; then according to installation instructions ccnt~~~mplated to be furni~hed with each washer, the foot 88 is slightly extended to make leg 12 slightly the longest, whereas legs 1~ and 18 are made somewhat shorter and the diagon~ ly opposite le~t rcar leg 16 becomes the shortest, all solidly on a level floor.
FLOOR P~N DRAIN~GE -- FIGURES 2, 3 The unequal adjustment just described of the legs of the floor stand 11, though hardly perceptible to the eye, produces a definite slope to the floor pan wall 28 from a high point at the right front corner 90 down to the low point 92 in the left rear corner which will be seen in these figures to bP
occupied by the drain line strllcture fragmentarily appearing at 86. Consequently, some portions o~ the liquid runoff will drain alongside the walls rectilinearly in the direction of thc respective right angle arrows 94 and 96, whereas the major 10w will be diagonally across the pan in the direction of the arrow 98, all without allowi.ng runo.f~ to puddle or otherwise accumulate ~ut instead to immediately drain ~rom the pan.
The comparatively extended adjustment ill.ustrated in Pigure 1 at 88 presumes a level floor benea-th the ~loor stand 11 and is somewhat exaggerated as shown; however, the feet for all legs provide a considerable range of longitudinal adjustment so khat on uneven flooring the leg 12 is e~fectively the longest from the level standpoint. The true horizontal plane appears at 100 in Figure 3, out of which the canted wall 28 is shown upwardly tilted as evidenced by the right front corner 90 being in the desired way at the high point for good, gravity directed runoff.
~ORCED LIQUID CIRCUL~TION -- FIGURE 4 In their locations on opposite vertical sides of the air space 102 by which they are kept forcibly separated, the chamber 24 at the bottom is maintained sealed apart by the wall 28 and the reservoir chamber 104 at the top is maintained sealed apart by the impervious reservoir cover 106. A fill opening cap 108 tightly closes off a fill opening in the cover and a drain plug 110 tightly closes off a drain opening in the bottom wall of the reservoir 80.
In structure 86, a drain trap 112 is provided therefor of ~amiliar plumbing U~shape; in the usual way, the trap holds itselE continually full of li~uid. At the lowest ba~e point in the bend therein, the trap 112 has a depending vertical extension 114 which, when unplugged as provided for at the bottom, allows metal chips and an accumulation of grit and other particles which sink down out o~ the liquid to be p~riodically removed from the liquid system.
Connected to the upstanding legs of the drain trap 112 at opposed points both above the liquid level, a tan~
vent 116 provided with small diameter restrictions at opposite ends hridges across the top of the trap 112. No wire mesh or other screening is required for its function as a fire barrier becaus-s of equal effectiveness of -the smallness of tandem restrictions in that function; 50 the interior of the reservoir chamber 104 readily vents off any accumulated vapor or pressure into and up and out of the throat 118 of the drain line structure 86. The thus bypassed drain trap 112 conducts the flow of liquid only, and only in the direction of the reservoir tank 80 in which i5 iS kept in storage available to be pumped out.
A drain plug arm 120 is supported on the _ 9 _ ~ ~5~ o end wall 32 by a pivot hracket 122 for pivoting be-tween an upstanding position, not shown, and a limiting horizontal position which as illustrated overlies the mouth of the drain line structure 85. A drain plug 124 suspended in spaced apart relation within the mouth much like an unseated poppet valve is connected at the top by a heat ~usible link 126 to the arm 120 for support. The drain pluy 124 is connected at the bottom by a highly stretchable tension spring 128 to a strainer basket 130 detachably secured inside ~he throat of the drain line structure 86.
Raising the arm 120 upwardly on its pivot bracket 122 will cause the spring 120 to stretch sufficiently that it can be u~looked at either the end connected to the ~trainer basket 130 which ordinarily stays in place or the end connected to the plug 124 being withdrawn from the mouth of the drain~ Made acces~ible in this w~y, the basket 130 can be detached, ~rom where secured in the throat, and then emptied.
The basket 130 strains out only the largest particles and the normal suspende~ position o~ the plug 124 allows space all around for the 'argest particles to pass into the mouth o~
the drain line structure 86.
All liquid which the pump 72 causes to be discharg~d by the nozzle 44 eventually makes its way back from the chamber 24, thence through the drain structure 86, and into storage in the tank 80 so as to be av~ilable again ~or the pump 7 2 .
FORCED INTERNAL ATMOSPHERE CIRCUI~TION ~- FIGURES 5, 6 A wire grille 132 covers the inlet 13~
to the tower 62 which, on the inlet's outer side, carries a liquid agglomerating ilter 136 behind the grille 132 and which, on the inlet's inner side, carries the col~unicating tower scroll housing 138 containing the blower rotor cage 140. A motor shaft 142 passing f.rom the blower motor 60 through a shaft seal 144 in wall 36 supports the blower cage 140 for high speed rotation causing the internal atmosphere of the spray chamber to be drawn through the filter 136 in the inlet 134 i.n the d-;rection indicated by a suction arrow and then be forced down the blower ~ower 62 in ~he vertical direction of the arrows shown therein.
Cleaning~ uid fog is extracted from th~
chamber's internal atmosphere by the agglomerating ~ilter 136, a good part of the thus separated li~uid in the ~ilter agglomerates as droplets or drops in a drip hole 146 at the bottom o~ the ~ilter 136 so as to fall in the char~er in a side path it takes which I indicate genexally at 148 and which I shall designate the 2cl crossover path.
The remainder of the agglomerate spills out the ~ace o~ the filter 136 on the inner side so as to go down th6! inside o~ the blower tower 62 in a 3d crossover path generally indicated ak lSO, either by free all as drops or droplets or by dripping or running down along the inside wall of the tower and out. through a drip hole.
Although the just preceding discussion o air-blowar forced circulation was presented separately and independently from a prior appearing discussion of pump forced liquid circulation, the string0ntly confined paths of these two closed circula-tion systems establish cooperation and have three common portions contained wi-thin -the con~ines of tha spray chamber 24. The essentially air-tight integrity o the surroundiny cabinet fregmentarily shown. in Figure 7 at 22 will insure a leak-~ree internal air path schematically indicated at 152 and a leak ~ree liquid path s~hematically fragmentarily indicated at 154.
EIigh pressure pump spray 156 along path 154 can be selectively directed by the gloved hands o~ the operator at the work W supported in the chamber 24, for example, directed at the housing of an automotive power steering pump requiring gr.it and grime and an oily film to be stripped off. The cleaning liquid runoff 158 along sloping path 154 carries with it the impact~dislodged grit and grime plus the solute therein from the clinging oil and dirt film dissolved by the liquid off the work W.
Splash and splatter of the extremely fast moving spray particles being stopped by the work W produces con-tinuous mist from the cleaning liquid which, in a common portion of travel shared by the circulating liquid and air, transfers as a ~og in a 1st crossover path 160 into ent.rainment in the chamber's ciLculating internal atmosphere.
Simultaneously, continuous agglomerate being recovered by the filter 136 is in part following the 2d crossover path 148 and in part following the 3d crossover path so that the two parts can combine and together be reunited with their parent stream of liquid runoff 158 at a floor pan junc-ture schematically appearing at 162. This common portion of trav-el shared by the circulating liquid anci air makes possible the complete return for re-use of all cleaning liquid applied, and as one body it enters and pours down the dra.in line structure 86.
In the ordinary case, the continual stripping, by filtration, of the rising mist from the air almost as soon as it forms therein never allows the vapor concentration to run V ~
high enough ~or fogging over the operator's viewing glass 40 in the console, not shown. ~owever, problem cases can arise where a hotter cleaning spray is desired or where the cleaning liquid employed has, even without heating, an inherently high vapor pressure. Further means of preventing fogging are provided in the practice of my invention.
MODIFIED EMBODIMENT -- FIGURES 8,9 Illustrative of one such means is the modi~ied embodiment of the invention as shown in these figures.
Within the environment of the machine 20 already described and equipped with a floor stand 11, the modification occurring is made to the blower tower 62a to enable the machine to perform with normal effectiveness even under the most stringent operating condition of glass fogging. In place of being precisely vertical as before, the tower 62a as it runs alongside end wall 36 could be more properly des~cribed as horizontal, in its generally diagonal disposition as it extends forwardly toward its outlet 66 near the front right side of the machine. The tower 62a thus lies essentially in the vertical plane containing the right edge of the glass 40, being below that edge and spaced parallel thereto and to the plane of the glass. The agglomerate drip follows, as before, the 2d and 3d respective crossover paths 148 and 150.
The outlet 66 and glass 40 are essentially transversely aligned across the width dimension of the machine, and the generally horizontally disposed louvers or vanes 64 are angled in the outlet for a slight nozzle uptilt direction to discharge the vapor-ridded air from the outlet 66 onto and then alongside the inner face of the glass 40. Although the scouring effect is akin to action expected from an automotive defogging and defrosting nozzle, the effect is moreso here ~ g~ 14 because the leaning-liquid og-removal in this instance changes the actual character of the air being blown which has been ridded of its fog contents. So the glass surface is being dried by the scrubbing hereof with a forced blanket o~ drying air, as well as being air-curtained o~f from having a stagnant layer o~ foggy air moving in and misting up the undersideO
CLEANING I,IQUID
Cleaning li~uids o~ a wide assortment are satisfactory ~or use in the present machine, and they commercially vary in composition according to the character of the industry in which they are utilized. Low bubbling soap solutions can be e~fectively applied by the machine to the various parts re-quiring washing. In the bakery industry, for example, a low sudsing, heated detergent solution under the strong spraying pow-er hereof can readily scour o~f the baking pans; i~ need be, an electric heating coil can be installed in the xeservoir tank o~ the machine to keep the solution warmed to the desi.red wash temperature at all times.
In preferred use o~ the machine which is as a parts washer ~ound so convenient to garage and other mechanics, a regulax parts washer liquid will be employed usually consisting of a petroleum based cleaning solvent. It is essential that the petroleurn constituent have a high flash point, and a value o~
104 F and higher is not uncommon in the petroleum solvents ~ound in washers in the usual service and machine shops and repair garages. In many such shops and garages the brand used currently and ~ound altogether acceptable is Stoddard petroleum solvent rnade by Safety-Kleen Company. Another suitable brand, ma~e available throughout many i~ not most states within continental USA by the Distributor W. W. Grainger, Chicago, IIlinois, is Graymills Super Agi~ene cleaning solvent. All such in my machine ha-~e the tendency under the impetus of the high pressure impact to create a "wet" atmosphere, which is the problem confronted with petroleum solvents and surmounted herein. And of course it is no solution to the problem to allow positive internal air pressure to develop because of fume problerns; the presen~ machine never develops pressure inside and hence has no tendency to force fumes out in the air.
In other words in non-analagous devices, such as transpires in air blast, sand blast, and water blast machines as the machine continues in periods of operation, the air or sand or water admitted continues to increase as a displacing volu~lle inside, inevitably building up pressure therein which makes its way directly to the outside. As already no-ted in connection with the instant parts washer, solvent emitted by the spray nozzle then goes through one path or another eventually aLl to return to the pump for recirculation. And all air drawn into the hl~wer tower inlet is, upon dryiny, immediately there-after readmitted in total back into khe spray chamber whence it came. There is no net gain and no net loss in volume, and hence nothing to give xise to an internal pressure buildup which will expel fumes.
AIR FILTER
The ~pecifications for the agglomerating filter are not rigid in the least; it works to ~ull effectiveness as soon as all surfaces are wetted by the liquid and in one satisfactory working form was a ~" thick, 5" diameter cl05ely knit pad of thin, chemically inert fibrejs. The film on the fully wetted surface areas thereof is continually fed by the impacting fog particles.
Fiberglas fiber is suitable for the knit pad ~ 16 material ar~d so is zinc coated steel mesh, particularly when a petroleum solvent solution is being filtered out. For better efficiency the thickness can be increased to ~", and further satisfactory materials include foam rubber, paper filter material such as found in the air intake cleaner and silencer for automobiles, foam polyurethane material, and aluminum fine mesh.
OPE~ATION
As an example o~ the level o~ operating pressure I am referring to as a high pressure operation, -the pump discharges at 1,100 psi in one generally satisfactory embodiment which has been built o~ the invention. In the main, pumps matched in capacity and outlet pressure to the nozzle to he employed would discharge in the broad range of 500 psi to 2,000 psi, whereas the preferred operating range for pressure delivered to the nozzle would be somewhere approximately from 1,000 psi to 1,500 psi~ The glove box gloves loom as especially attractive built in at~:achments because o~ these exceptionally high nozzle velocities which result, as compared for example with so-called flushing machines ~or cleaning in which the advertised pressure on the nozæle has a stated range o 400psi to 600 psi.
Because of the stripping effect of solvent herein under a discharge pressure o~ 1,100 psi, for example, no brushing is ordinarily required; with the part in or at least manipulated by one gloved hand and the nozzle in the other, the operator exposes the interior and exterior surfaces of the part to direct force of the spray so as to dislodge the loose and clirlging matter and dissolve deposited layers, films, and coats such as lubricant of which the part is to be ridded~ Full force spraying will continue as long as the operator's ~oot presses the foot switch.
In a reversal of all steps of the foregoing procedure, the operator releases the foot switch, extricates his hands and forearms from the gloves, opens the door and, among other things, extricates the completely spray cleaned part. Additionally as I insist in my own operations, the part is then washed by hand in regular hot water and suds, rinsed o~f, and dried i~ a ball bearing, ~or example, the bearing thus carrying with it no residual film of petroleum solvent to interfere with the surfaces thereafter directly establishing intimate wetted con-tact with lu'bricant when being recoated for reinstallation.
~ lthough each and every one of machines coming o~ the production line embodying my invention may not be so perfectly sealed that no vapors can come out, such machines can generall~ 'be consi~ered as fume-tight if not literally so;
escapinc~ petroleum ~umes in heavy con~ration in the outside air will in circumstances render the solvent a fire hazard, not good to 'breathe, possibly explosive, and a problem because of coating things in buildings.
U~USUI~L CIRCI~MSTA~CES
I~, under such a remote possibility that it i~ difficult to imagine, the machine door happens -to be open when a flying spark or open flame or naked electrical spark happens about, the door under gravity will slam shut and relatch im-mediately it is released to close. So any accumulation of random vapors in the spray cham'ber which could ~ave ignited prior to door closure would promptly 'burn themselves out as the limited supply of chamber oxygen was exhausted because of the sealed of~ chamber being atmosphere-tight to the oxygen supply 1~
in the air outside. It is doubtful the liquid film or droplets on the interior surfaces could evaporate in the short period ensulng .
If, under an even more remote possibility, the circumstances were such that either the low concentration of solvent vapor in the chambar atmosphere or solvent liquid ~low in the chamber making its way expeditiously to drain were somehow to erupt in flames, right during a spraying operation, the fire could never spread beyond being a seal~d off internal one and would promptly snuff out. Four added factors would au-to-mati.cally or inharently contribute to the extinguishing of the ire as the internal supply of oxygen was fast being depleted.
~irst, the bl.ower tower would be removing spent combustion products and also solvent mist before it ever ignited, and the.n be pouriny back toward the fire in the chamber air carrying a mi.~ed-in heavy concentration o~ dry combustion products which would dilu~e the remaining air and tend to blanket and smother 1ames~ Second, the U-shaped drain trap would furnish a ~ira barrier at the top with the restricted vent thereacross, and require enough continuous oxygen so as to continuously brun out all solvent trapped down and around in the U; and otherwise, there is no path available for fire to reach the solvent reservoir tank spaced as it is safely below the floor pan of the chamber. Third, heat from combustion going on in the drain line throat below or in the chamber adjacent the mouth of the drain line would melt the ~usible link holding open the plug in the mouth; unopposed bias from the tension spriny connected to the bottom of the plug would snap the plug down shut, completely isolating the spray chamber and any avenua for the fire to escape and spread. Fourth, not only would oxygen 5~
and hiyhly diluted vapor be ex~remely scarce in their availability in the chamber, but also the rapid runoff being accomplished by the sloping floor pan would insure no pool or pocket of solvent could be present in the chamber to feed a fire. So the life of any such fire would be extremely short, and always confined within the sealed integrity of the system.
A pump particularly well suited to the practice of this invention has not only the characteristic of delivering the referred to continuous high pressure to the spray no~zle, but equally the characteristic of delivering a continuous high rate of flow as compared to the usual low capacity pumps of parts washers in general. In practice, a pump capacity of 3.5 gallons per minute continuously delivered under high pressure has proved satisfactory for the high rate, nozzle discharge velocities required herein. And it has been ~ound here that that volume of spray flow can ba altogether adequately supplied from a relatively moderately sized reservoir in a particular form of my invention, which is a preferred form for that reascn and will now be explained.
PRE~ERRED EMBODIMENT -- FIGURES lO, 11 In this embodimen~, the floor pan wall 28 is cut out at the center to form a laxge rectangular drain opening 164 and, at.the rectangular outer edges, is formed as a base tray carrying a continuous short upstanding flange 166.
The chamber side walls including the left end wall 32, the back side wall 34, and right end wall 36 join the floor pan wall 28 in tightly overlapping relation with ~he base tray flange 166 which is on t~le outside.
A continuous bracket 168 made of a Z-shaped metal strip overlaps with the entire underside edge of the rectangular drain opening 164 so as to form at an upper bracket .
, ~.
~ ~ ~ 5 ~?2 level a fixed shelf 170, or ledge, receiviny a rectangular removable work surface 172 which in e~ect completes the base tray and is in the plane thereof. The surrace 172 is presented by a me~l suppo~t plate formed with a pattern of regularly spaced apart, large perforations 174 therethrough~
At a lower bracket level the strip forms a continuous, slightly inwardly offset rectangular fixed s~elf 176 or ledge which complementarily receives the short, horizontal lateral supporting flange 178 of a close meshed, wire filter basket 180.
The work surface 172 presented ~y the support plate is useEul during the spray cleaning of a part. So the plate stays in place as illustrated while the operator has his hand~ and forearms working in the built-in gloves, not shown.
But when no spraying is going on, the support plate dves not always stay in the machine. It is usually but not necessarily removed in order to refill the tank 80a ~ollowing a draining and cleaning out upon removal of the drain cap 110.
The support plate is r~moved in order to lift out and empty the ~asket 180 o~ ccllected sludge, debris, trash, and other residue ~rcm the vigorous spray cleaning, as compared to the simple flushing o~ of parts by prior parks washers. Also the support plate is removed when the ~elvent level is high enough in tank 80a to immerse the basket li~0 and allow the machine to be used as a quiescent soak tank f~r parts.
SPECIFICATIONS AND OPERAT~ON ~- FIGURES 10, 11 In one physically constructed embodiment of the invention, thP base tray around the outside as delineated by the upright ~lange 166 had a rectangular measurement o~ 26" on the short side by 34" on the side across the width of -the machine.
... .
~.
~ 5 ~ ~ 21 The horizontal surfaces shown in plan view in Figure 10 were all level.
During spraying, the downflow capacity o~
the number of perforations 174 in aggregate over the entire area of the work surface 172 was more than adequate to drain off the 3.5 gpm runoff o~ solvent liquid; the side wall and bottom area or the filter basket 180 in total was more than equal to set~ling out the sludge and returning the solvent as filtered liquid to the res2rvoir 80a for re-p~ping. Upon each re-start of spraying, it was found that a mere residual volume of 5 yallons of solvent in the -tank 80a was sufficient both for the start-up and ~or the continual run of spraying sustained at 3.5 gpm.
The spray delivery rate o~ the embodiment as shown in Fiyures 10 and 11 has proved exceptionally high in the yeneral cl~ss of parts washers, despite its conskruction being at once simplified, compact, easily maintained, and ~airly ~oolprooE and stra.ightforward in operation. Brushing to dislodge caked-on oil, grease, grit, and grime is practically unheard of, and the force of impact of the spray jet does the effective surface stripping and scourin~ necessary. And, as previously indicated, the tight integrity of the spray chamber and rest of the system negates any problem of outleak o~ the mist coming off the spray jet impact area.
Variations within the spirit and scope of the invention described are equally comprehended by the foregoing description.
Claims (19)
1. Parts cleaner adapted for high pressure hand spraying in a closed system comprising:
a fully enclosed spray chamber (24) including a spaced apart sealed top wall and floor pan wall, and continuous side walls joining same including a front side wall, an end side wall at an end, and a rear side wall;
a liquidproof pair of glove box gloves (54) extending into the spray chamber from one of said side walls and sealed at their bases to the latter, said walls all impervious;
a closed, pump-recirculated liquid recycling circuit for a sprayed on liquid medium to be applied in the cleaner including a filter (82) upstream of the pump (72) and, on the downstream side, a high pressure hose and hand nozzle (44) supplied thereby and together manipulatable in said spray chamber; and a closed, blower-recirculated atmosphere recycling system for the totally confined air contents contained by the chamber including a vapor-to-liquid agglomerating filter (136) to intercept the confined air and its entrained splash-induced spray contents upstream of the blower (140) and, on the downstream side, a tower and deflector (64) supplied by the blower and together cooperating to remove from the air stream for recycling the recovered liquid and to reintroduce the thus recycled air for continued circulation within its closed confines.
a fully enclosed spray chamber (24) including a spaced apart sealed top wall and floor pan wall, and continuous side walls joining same including a front side wall, an end side wall at an end, and a rear side wall;
a liquidproof pair of glove box gloves (54) extending into the spray chamber from one of said side walls and sealed at their bases to the latter, said walls all impervious;
a closed, pump-recirculated liquid recycling circuit for a sprayed on liquid medium to be applied in the cleaner including a filter (82) upstream of the pump (72) and, on the downstream side, a high pressure hose and hand nozzle (44) supplied thereby and together manipulatable in said spray chamber; and a closed, blower-recirculated atmosphere recycling system for the totally confined air contents contained by the chamber including a vapor-to-liquid agglomerating filter (136) to intercept the confined air and its entrained splash-induced spray contents upstream of the blower (140) and, on the downstream side, a tower and deflector (64) supplied by the blower and together cooperating to remove from the air stream for recycling the recovered liquid and to reintroduce the thus recycled air for continued circulation within its closed confines.
2. The high pressure parts cleaner according to claim 1, characterized by:
said glove box gloves sealed to and supported by the front side wall (30), and said atmosphere recycling tower (62) supporting the vapor-to-liquid agglomerating filter and supported on the inside of, and by, another (36) of said side walls.
said glove box gloves sealed to and supported by the front side wall (30), and said atmosphere recycling tower (62) supporting the vapor-to-liquid agglomerating filter and supported on the inside of, and by, another (36) of said side walls.
3. The high pressure parts cleaner according to claim 1, characterized by:
a viewing window (40) inset in said sealed top wall (26) susceptive to fogging over incident to the splash-induced spray accumulating to a high vapor concentration in the confined spray chamber atmosphere;
said blower-recirculated atmosphere recycling circuit effective to limit and dilute the vapor to a reduced concentration by the vapor-to-liquid agglomeration in said filter (136) and by reintroduction of air when recycled for continued circulation within the closed confines of said spray chamber.
a viewing window (40) inset in said sealed top wall (26) susceptive to fogging over incident to the splash-induced spray accumulating to a high vapor concentration in the confined spray chamber atmosphere;
said blower-recirculated atmosphere recycling circuit effective to limit and dilute the vapor to a reduced concentration by the vapor-to-liquid agglomeration in said filter (136) and by reintroduction of air when recycled for continued circulation within the closed confines of said spray chamber.
4. The high pressure parts cleaner in accor-dance with claim 1, characterized by:
said blower tower (62) supported on an inside surface of said chamber end wall (36) and having a medially opening inlet (134) at an upper level in the chamber and a medially opening outlet (66) at a lower level.
said blower tower (62) supported on an inside surface of said chamber end wall (36) and having a medially opening inlet (134) at an upper level in the chamber and a medially opening outlet (66) at a lower level.
5. The invention of claim 4, characterized by:
said inlet (134) carrying the filter and said outlet (66) carrying the deflector.
said inlet (134) carrying the filter and said outlet (66) carrying the deflector.
6. The invention of claim 5, characterized by:
a forwardly sloping console window inset (40) in the sealed top wall (26) in closely spaced adjacency to the front wall (30), said inset susceptive to fogging;
said tower depending diagonally on its supporting end wall away from its inlet (134) toward the front wall, the outlet and deflector (64) carried thereby establishing cooperation with the console window inset for blanketing same with the forced-pressure reintroduction thereacross of de-saturated recycled air to defog the latter.
a forwardly sloping console window inset (40) in the sealed top wall (26) in closely spaced adjacency to the front wall (30), said inset susceptive to fogging;
said tower depending diagonally on its supporting end wall away from its inlet (134) toward the front wall, the outlet and deflector (64) carried thereby establishing cooperation with the console window inset for blanketing same with the forced-pressure reintroduction thereacross of de-saturated recycled air to defog the latter.
7. A stand, and a machine thereon to receive a part to be spray cleaned by the machine comprising:
a high pressure hand nozzle (44) for spray-ing cleaning liquid upon the part to be cleaned, said nozzle producing liquid runoff from impact of the high pressure spray on the part to be cleaned, and producing vapor rise-off (160) from the impact area of the high pressure spray;
means forming a blower-forced path of closed cycle recirculation for recycling the atmosphere of the machine including a vapor-to-liquid agglomerating filter (136) on the upstream side of the air blower (140);
a cabinet (22) housing the path of the atmosphere recycling means and high pressure nozzle to form thereabout and about the part to be sprayed an enclosure of substantially complete integrity; and means forming a pump-forced path of closed cycle recirculation for recycling the cleaning liquid of the machine including the high pressure nozzle, said path for the atmosphere's closed cycle and said path for the liquid's closed cycle having a common portion beginning intermediate the nozzle (Claim 7, continued) and part to be spray cleaned, completely enclosed by said enclosure, and accommodating crossover (160) of the vapor from the liquid path into the atmosphere path for admission to, and separation from atmosphere entrainment in, the vapor to-liquid agglomerating filter located relatively upstream in the latter path.
a high pressure hand nozzle (44) for spray-ing cleaning liquid upon the part to be cleaned, said nozzle producing liquid runoff from impact of the high pressure spray on the part to be cleaned, and producing vapor rise-off (160) from the impact area of the high pressure spray;
means forming a blower-forced path of closed cycle recirculation for recycling the atmosphere of the machine including a vapor-to-liquid agglomerating filter (136) on the upstream side of the air blower (140);
a cabinet (22) housing the path of the atmosphere recycling means and high pressure nozzle to form thereabout and about the part to be sprayed an enclosure of substantially complete integrity; and means forming a pump-forced path of closed cycle recirculation for recycling the cleaning liquid of the machine including the high pressure nozzle, said path for the atmosphere's closed cycle and said path for the liquid's closed cycle having a common portion beginning intermediate the nozzle (Claim 7, continued) and part to be spray cleaned, completely enclosed by said enclosure, and accommodating crossover (160) of the vapor from the liquid path into the atmosphere path for admission to, and separation from atmosphere entrainment in, the vapor to-liquid agglomerating filter located relatively upstream in the latter path.
8. The invention in accordance with claim 7, characterized by:
said stand (11) at least substantially vertically disposed and holding the machine at least slightly canted (88) for rapid flow in the enclosure of the runoff and separated vapor-to-liquid agglomerate recovered.
said stand (11) at least substantially vertically disposed and holding the machine at least slightly canted (88) for rapid flow in the enclosure of the runoff and separated vapor-to-liquid agglomerate recovered.
9. A stand (11), and a cleaner machine (20) thereon providing a closed system to receive a part to be hand spray cleaned under high pressure in the machine, comprising:
a fully enclosed spray chamber (24) in-cluding a spaced apart sealed top wall and floor pan wall, and continuous side walls joining same for totally confining the air contents contained by the chamber;
a closed, pump-recirculated, liquid recycling circuit for a sprayed on liquid medium to be applied in the cleaner including a reservoir tank (80) hydraulically upstream or the pump and, on the downstream side, a high pressure hose (46) and hand nozzle (44) supplied thereby and together manipulatable in said spray chamber;
a closed, blower-recirculated, atmosphere recycling system for the totally confined air contents contained by the chamber;
a U-shaped drain trap (112) interconnecting a drain opening (118) in the floor pan wall (28) and an inlet (Claim 9, continued) opening in the reservoir tank; and a plug (124) depending from a heat fusible link (126) and suspended thereby above a place on the drain opening so as to plug the opening when dropped in place thereupon.
a fully enclosed spray chamber (24) in-cluding a spaced apart sealed top wall and floor pan wall, and continuous side walls joining same for totally confining the air contents contained by the chamber;
a closed, pump-recirculated, liquid recycling circuit for a sprayed on liquid medium to be applied in the cleaner including a reservoir tank (80) hydraulically upstream or the pump and, on the downstream side, a high pressure hose (46) and hand nozzle (44) supplied thereby and together manipulatable in said spray chamber;
a closed, blower-recirculated, atmosphere recycling system for the totally confined air contents contained by the chamber;
a U-shaped drain trap (112) interconnecting a drain opening (118) in the floor pan wall (28) and an inlet (Claim 9, continued) opening in the reservoir tank; and a plug (124) depending from a heat fusible link (126) and suspended thereby above a place on the drain opening so as to plug the opening when dropped in place thereupon.
10. Stand and machine in accordance with claim 9 characterized with:
said drain opening (118) disposed in the generally horizontally plane of the floor pan wall adjacent its periphery; and said stand (11) at least substantially vertically disposed and so holding the machine that the floor pan wall is at least slightly canted (88) out of the horizontal plane directly toward the drain opening on the down side.
said drain opening (118) disposed in the generally horizontally plane of the floor pan wall adjacent its periphery; and said stand (11) at least substantially vertically disposed and so holding the machine that the floor pan wall is at least slightly canted (88) out of the horizontal plane directly toward the drain opening on the down side.
11. Stand and machine in accordance with claim 10 characterized with:
said drain opening (118) being disposed in the periphery of said floor pan adjacent a corner (92), whereby runoff follows a general diagonal course (98) over the floor pan wall (28) and into the drain opening and directly down with no accumulation on the pan wall.
said drain opening (118) being disposed in the periphery of said floor pan adjacent a corner (92), whereby runoff follows a general diagonal course (98) over the floor pan wall (28) and into the drain opening and directly down with no accumulation on the pan wall.
Stand and machine in accordance with claim 9 characterized with:
a restricted vent (116) bridging across the top of the U-shaped drain trap (112) and restricting all res-ervoir tank vapor rise-off to the closed confines of the chamber.
a restricted vent (116) bridging across the top of the U-shaped drain trap (112) and restricting all res-ervoir tank vapor rise-off to the closed confines of the chamber.
13. Machine receiving parts to be cleaned thereby and providing for high pressure hand spraying of same therein in a close system, comprising:
a fully enclosed spray chamber of essentially fume tight integrity, for confining the spray from the spraying (Claim 13, continued) and runoff of cleaning liquid from the spraying;
forced blowing means in the machine for blowing the atmosphere of the chamber in an internal path of closed cycle recirculation for recycling same by blower and effectively filtering in an internal blower tower the atmosphere from its entrained spray vapor in a filter ahead of the tower; and forced pumping means for the machine for pumping therethrough the cleaning liquid in another path of closed cycle recirculation for recycling same by pump and effect-ively subjecting the chamber parts to forced pressure spraying thereupon and resulting runoff and spray emanating in the chamber therefrom, said internal path and said other path of forced recirculation having common portions totally confined within 1:he integrity of enclosure by the chamber, which enclosure confiTIes o~e oi their said common portions so as to define a 1st crossover path of vapor, rising rom the spray in the liquid path, into entrainment in the atmosphere path, and which enclsoure confines another common portion so as to define crossover path means of liquid agglomerate collected by the filter from the atmosphere path and reunited through the crossover path means with the liquid runoff in the liquid path.
a fully enclosed spray chamber of essentially fume tight integrity, for confining the spray from the spraying (Claim 13, continued) and runoff of cleaning liquid from the spraying;
forced blowing means in the machine for blowing the atmosphere of the chamber in an internal path of closed cycle recirculation for recycling same by blower and effectively filtering in an internal blower tower the atmosphere from its entrained spray vapor in a filter ahead of the tower; and forced pumping means for the machine for pumping therethrough the cleaning liquid in another path of closed cycle recirculation for recycling same by pump and effect-ively subjecting the chamber parts to forced pressure spraying thereupon and resulting runoff and spray emanating in the chamber therefrom, said internal path and said other path of forced recirculation having common portions totally confined within 1:he integrity of enclosure by the chamber, which enclosure confiTIes o~e oi their said common portions so as to define a 1st crossover path of vapor, rising rom the spray in the liquid path, into entrainment in the atmosphere path, and which enclsoure confines another common portion so as to define crossover path means of liquid agglomerate collected by the filter from the atmosphere path and reunited through the crossover path means with the liquid runoff in the liquid path.
14. The invention of claim 13, said crossover path means characterized by:
a 2d crossover path of liquid agglomerate dripover draining from a filter drip hole into reunion with the liquid of the runoff in the liquid path; and a 3d crossover path of liquid agglomerate spill-over of the filter into the internal blower tower and draining therefrom into reunion with the liquid of the runoff in the liquid path.
a 2d crossover path of liquid agglomerate dripover draining from a filter drip hole into reunion with the liquid of the runoff in the liquid path; and a 3d crossover path of liquid agglomerate spill-over of the filter into the internal blower tower and draining therefrom into reunion with the liquid of the runoff in the liquid path.
15. High pressure method used in machine cleaning in a machine receiving parts to be cleaned, and providing a closed system for high pressure hand spraying of same therein in a fully enclosed spray chamber of essentially fume tight integrity, said chamber by the integrity of its enclosure confining the spray from the spraying and runoff of cleaning liquid from the spraying, comprising the steps of:
forced blowing (140) in the machine of the atmosphere of the chamber in an internal path of closed cycle recirculation fox recycling same by blower and effectively filtering in an internal blower tower the atmosphere from it entrained spray vapor in a filter ahead of the tower, forced pumping (72) through the machine of the cleaning liquid in another path of closed cycle recir-culation for recycling same by pump and effectively subjecting the chamber parts to forced pressure spraying thereupon and resulting runoff and spray emanating in the chamber therefrom, effecting crossover in a 1st crossover path of vapor rising from spray in the liquid path into entrainment in the atmosphere path, all within the closed confines of said enclosure; and effecting crossover in crossover path means of liquid agglomerate collected by the filter from the atmosphere path and reunited through the crossover path means with the liquid runoff in the liquid path, all within the closed confines of said enclosure.
forced blowing (140) in the machine of the atmosphere of the chamber in an internal path of closed cycle recirculation fox recycling same by blower and effectively filtering in an internal blower tower the atmosphere from it entrained spray vapor in a filter ahead of the tower, forced pumping (72) through the machine of the cleaning liquid in another path of closed cycle recir-culation for recycling same by pump and effectively subjecting the chamber parts to forced pressure spraying thereupon and resulting runoff and spray emanating in the chamber therefrom, effecting crossover in a 1st crossover path of vapor rising from spray in the liquid path into entrainment in the atmosphere path, all within the closed confines of said enclosure; and effecting crossover in crossover path means of liquid agglomerate collected by the filter from the atmosphere path and reunited through the crossover path means with the liquid runoff in the liquid path, all within the closed confines of said enclosure.
16. The invention of claim 15, the crossover path means affording crossover characterized by:
effecting crossover in a 2d crossover path (148) of liquid agglomerate dripover draining from a filter drip hole into reunion with the liquid of the runoff in the liquid path.
effecting crossover in a 2d crossover path (148) of liquid agglomerate dripover draining from a filter drip hole into reunion with the liquid of the runoff in the liquid path.
17. The invention of claim 16, further characterized by:
effecting crossover in a 3d crossover path (150) of liquid agglomerate spillover of the filter into the internal blower tower and draining therefrom into reunion with the liquid of the runoff in the liquid path.
effecting crossover in a 3d crossover path (150) of liquid agglomerate spillover of the filter into the internal blower tower and draining therefrom into reunion with the liquid of the runoff in the liquid path.
18. High pressure method of machine spraying of articles to be cleaned when enclosed in the machine and by means of a pressurized cleaning liquid, comprising the steps of:
impinging on an article to be cleaned a high pressure spray of cleaning liquid producing floor runoff (158) from the high pressure spray in its zone of washing off the article, and producing vapor rise-off (160) from the direct impact zone of that high pressure spray;
forced blowing (140) in the machine of the atmosphere thereof in an internal path of closed cycle recirculation for recycling same by blower and effectively causing vapor-to-liquid agglomeration and separation by filtering (136) the atmosphere of its entrained vapor while on the upstream side of the blower;
forced pumping (72) through the machine of the cleaning liquid thereof in a path of closed cycle recir-culation for recycling same by pump and effectively filtering (82) the liquid of washed-off contaminant while on the upstream side of the pump; and directing the path for the atmosphere's closed cycle and the path for the liquid's closed cycle so as to flow through an area in common beginning in said impact zone, the common area completely enclosed by the enclosure (22) and accommodating crossover (160) of the vapor from the liquid path (Claim 18, continued) into the atmosphere path for admission into, and separation from atmosphere entrainment in, the vapor-to-liquid agglomerating filtering (136) located relatively upstream in the forced blown atmosphere path.
impinging on an article to be cleaned a high pressure spray of cleaning liquid producing floor runoff (158) from the high pressure spray in its zone of washing off the article, and producing vapor rise-off (160) from the direct impact zone of that high pressure spray;
forced blowing (140) in the machine of the atmosphere thereof in an internal path of closed cycle recirculation for recycling same by blower and effectively causing vapor-to-liquid agglomeration and separation by filtering (136) the atmosphere of its entrained vapor while on the upstream side of the blower;
forced pumping (72) through the machine of the cleaning liquid thereof in a path of closed cycle recir-culation for recycling same by pump and effectively filtering (82) the liquid of washed-off contaminant while on the upstream side of the pump; and directing the path for the atmosphere's closed cycle and the path for the liquid's closed cycle so as to flow through an area in common beginning in said impact zone, the common area completely enclosed by the enclosure (22) and accommodating crossover (160) of the vapor from the liquid path (Claim 18, continued) into the atmosphere path for admission into, and separation from atmosphere entrainment in, the vapor-to-liquid agglomerating filtering (136) located relatively upstream in the forced blown atmosphere path.
19. High pressure method of machine spraying according to claim 18, further comprising:
directing the vapor-to-liquid agglomerate, as filtered, to flow into the floor runoff zone for crossover and refiltering and repumping re-united with the liquid's recirculation path.
directing the vapor-to-liquid agglomerate, as filtered, to flow into the floor runoff zone for crossover and refiltering and repumping re-united with the liquid's recirculation path.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/275,965 US4433698A (en) | 1981-06-22 | 1981-06-22 | High pressure parts washer |
| US275,965 | 1981-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1185502A true CA1185502A (en) | 1985-04-16 |
Family
ID=23054557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000396350A Expired CA1185502A (en) | 1981-06-22 | 1982-02-16 | High pressure parts washer |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4433698A (en) |
| CA (1) | CA1185502A (en) |
Families Citing this family (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4768534A (en) * | 1984-05-07 | 1988-09-06 | Anderson Max F | Portable cleaning apparatus |
| US4624690A (en) * | 1985-06-28 | 1986-11-25 | Markel Industries, Inc. | Apparatus for removing particulates |
| US4744379A (en) * | 1986-02-20 | 1988-05-17 | Goettel Andrew P | Conveyor system for washing apparatus |
| DE3608776A1 (en) * | 1986-03-15 | 1987-10-01 | Herbert Meyer | Cleaning unit |
| DE3706826C2 (en) * | 1986-03-15 | 1998-05-07 | Herbert Meyer | Cleaning device |
| US5213119A (en) * | 1986-03-20 | 1993-05-25 | Safety-Kleen Corporation | Solvent recirculating type spray gun cleaner |
| JPH074211B2 (en) * | 1987-01-21 | 1995-01-25 | 実男 稲垣 | Aseptic food processing equipment |
| US4918873A (en) * | 1989-02-21 | 1990-04-24 | Bass Donald R | Method and apparatus for refurbishing golf clubs |
| NZ234541A (en) * | 1989-07-19 | 1992-08-26 | Balisbex Pty Ltd | Parts cleaning apparatus; removable sludge chamber while solvent remains in apparatus |
| US4941714A (en) * | 1989-10-10 | 1990-07-17 | Anthony Seymour | Jewelry display and servicing kiosk |
| US4995409A (en) * | 1990-01-29 | 1991-02-26 | Watts Craig L | Automotive parts washer utilizing a volatile cleaning solution |
| US5183066A (en) * | 1991-04-02 | 1993-02-02 | General Dynamics Corp., Air Defense Systems Division | Spray nozzle cleaning apparatus and method |
| JP2696024B2 (en) * | 1991-11-07 | 1998-01-14 | 三菱電機株式会社 | Wet processing apparatus and control method thereof |
| US5482064A (en) * | 1991-12-03 | 1996-01-09 | Robowash Pty Ltd. | Cleaning apparatus |
| DE4310267A1 (en) * | 1993-03-30 | 1994-10-06 | Schreiber Walter Dipl Ing Fh | Device for cleaning articles |
| US5462434A (en) * | 1993-10-06 | 1995-10-31 | Henry Schein, Inc. | Dental hand tool clearing shield |
| WO1996001157A1 (en) * | 1994-07-01 | 1996-01-18 | R. Just Pty. Ltd. | Washing and cleaning unit |
| AU3823595A (en) * | 1994-09-30 | 1996-05-02 | Chemfree Corporation | Parts washing system |
| US5827374A (en) * | 1995-02-24 | 1998-10-27 | Mansur Industries Inc. | Process for integrated recycling of cleaning solution in industrial washing equipment |
| US5549128A (en) * | 1995-02-24 | 1996-08-27 | Mansur Industries Inc. | General parts washer |
| US5669401A (en) * | 1995-09-22 | 1997-09-23 | Mansur Industries Inc. | General washer apparatus |
| FR2771662B1 (en) * | 1997-12-01 | 2000-01-28 | Eurocopter France | MANUAL DEGREASING STATION |
| US7921578B2 (en) * | 2005-12-30 | 2011-04-12 | Whirlpool Corporation | Nebulizer system for a fabric treatment appliance |
| US8220471B2 (en) * | 2007-03-02 | 2012-07-17 | Safety-Kleen Systems, Inc. | Multipurpose aqueous parts washer |
| US20080210260A1 (en) * | 2007-03-02 | 2008-09-04 | Safety-Kleen Systems, Inc. | Multipurpose Aqueous Parts Washer |
| US8225804B2 (en) * | 2007-03-02 | 2012-07-24 | Safety-Kleen Systems, Inc. | Multipurpose aqueous parts washer |
| US9058707B2 (en) * | 2009-02-17 | 2015-06-16 | Ronald C. Benson | System and method for managing and maintaining abrasive blasting machines |
| BRPI1010779B1 (en) | 2009-06-05 | 2019-01-02 | Desmet Ballestra North America Inc | apparatus for processing spent material having solids, residual moisture, and solvent in it resulting from a solvent extraction process, and method for processing spent material having solids, residual moisture, and solvent in it resulting from a precursor solvent extraction process |
| GB2472104B (en) | 2009-07-25 | 2011-09-07 | Eminox Ltd | Cleaning a vehicle exhaust filter |
| GB2554066B (en) * | 2016-09-09 | 2019-02-20 | Quill International Group Ltd | A washing apparatus for 3D-Printed articles |
| DE102016012488B4 (en) * | 2016-10-19 | 2020-12-31 | Belimed Life Science Ag | Cleaning, disinfection and drying system |
| CN107855310B (en) * | 2017-12-19 | 2023-12-05 | 天津开发区合普工贸有限公司 | Portable contamination cabinet body quick cleaning device |
| CN110920061A (en) * | 2018-09-17 | 2020-03-27 | 三纬国际立体列印科技股份有限公司 | 3D prints finished product aftertreatment device |
| US20200215583A1 (en) * | 2019-01-04 | 2020-07-09 | Innovative Pathology Concepts, Inc. | Instrument cleaning apparatus and method |
| CN114789163B (en) * | 2022-04-19 | 2023-09-22 | 中国航发动力股份有限公司 | Cleaning device and method |
| CN116689376B (en) * | 2023-08-08 | 2023-10-20 | 山东新锐智能机器人有限公司 | Mechanical equipment adjusts maintenance device |
-
1981
- 1981-06-22 US US06/275,965 patent/US4433698A/en not_active Expired - Lifetime
-
1982
- 1982-02-16 CA CA000396350A patent/CA1185502A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US4433698A (en) | 1984-02-28 |
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