US20060199493A1 - Vent assembly - Google Patents
Vent assembly Download PDFInfo
- Publication number
- US20060199493A1 US20060199493A1 US11/051,896 US5189605A US2006199493A1 US 20060199493 A1 US20060199493 A1 US 20060199493A1 US 5189605 A US5189605 A US 5189605A US 2006199493 A1 US2006199493 A1 US 2006199493A1
- Authority
- US
- United States
- Prior art keywords
- vent
- head
- cover shell
- slots
- shell
- 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.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/02—Ventilation; Air-conditioning
- B63J2/10—Ventilating-shafts; Air-scoops
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/082—Grilles, registers or guards
- F24F13/084—Grilles, registers or guards with mounting arrangements, e.g. snap fasteners for mounting to the wall or duct
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPINGÂ
- B63B2231/00—Material used for some parts or elements, or for particular purposes
- B63B2231/02—Metallic materials
- B63B2231/04—Irons, steels or ferrous alloys
- B63B2231/06—Stainless steels
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
A vent assembly, suitable for marine use including, for example, venting an enclosure, such as an engine compartment, on a boat. The vent assembly has substantially the external appearance of a cast or machined, one piece, stainless steel vent, at a cost very little more than a molded plastics vent. A molded plastics vent has a head perforated by a pattern of ventilating slots separated by flanking strips. A decorative, corrosion-resistant, sheet metal cover shell lies tight against the front side of the molded plastics vent and has a pattern of slots and strips mapping substantially on the pattern of slots and strips of the molded plastics vent. Snap-fit fasteners fix the cover shell on the vent so that the cover shell slots are a substantially flush continuation of the vent slots, so as to provide the decorative appearance of a solid metal vent at substantially lower cost and without compromising or through flow capability.
Description
- This invention relates to slotted vents, and more particularly to slotted vents usable in marine applications such as for ventilating a motor enclosure on a boat.
- U.S. Pat. No. 5,588,908, assigned to the assignee of the present invention, discloses a apparatus for fixing a ventilating hose at an opening in a wall of an enclosure, e.g. for use on a boat in venting gases from the engine compartment, or venting cooking odor laden air from the galley, or admitting air. That apparatus includes a vent fitting comprising a radially extended, slotted head adapted to rest against the exterior face of the wall to hide an opening therein and a tubular body extending from the rear face of the head through the wall opening, to fix the vent fitting and an attached, rearwardly extending hose to the wall at the opening, to communicate flow through the hose and slotted head. To accomplish its various purposes, such vent fitting is of relatively complex form. Despite this, the assignee of the present invention has succeeded in forming such fittings of molded plastics material at relatively low cost and has successfully marketed units in substantial quantities, for example to boat manufacturers.
- However, the present assignee has found that for more expensive lines of boats, boat manufacturers and their buyers prefer more expensive looking fittings, e.g. stainless steel fittings, rather than less expensive looking molded plastics fittings.
- With that in mind, the present assignee has marketed molded plastics fittings of this general type with exposed surfaces chromium plated, by a conventional process, to achieve the richer, more expensive appearance of a polished metal fitting. While generally successful commercially, the present assignee has found that continuing contact, over a long period of time, with the elements in a harsh salt water marine environment, may attack, and eventually degrade the appearance of, the plated visible surfaces of such fittings.
- Accordingly, the present assignee has considered producing such fittings of corrosion resistant metal, such as stainless steel, as by casting or machining, and while such product is durable and can maintain a rich, expensive appearance over long periods of use, it is many times more expensive to produce than the same product of molded plastics material, and because of this expense would have a very limited market.
- The purposes of the present invention include overcoming these conflicting prior difficulties.
- This invention relates to a vent assembly, suitable for marine uses including, for example, venting an enclosure, such as an engine compartment, on a boat, which vent assembly has substantially the external appearance of a cast or machined, one piece stainless steel vent, at a cost very little more than a molded plastics vent.
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FIG. 1 is a pictorial view of a prior molded plastics vent substantially as disclosed in U.S. Pat. No. 5,588,908 assigned to the assignee of the present invention. -
FIG. 2 is an enlarged cross-sectional view of theFIG. 1 molded plastics vent. -
FIG. 3 is a pictorial view of a cover shell of convexly curved shape, taken from the front side thereof, and in accord with a preferred embodiment of the present invention. -
FIG. 4 is a pictorial view of theFIG. 3 cover shell taken from the rear side thereof. -
FIG. 5 is a front view of theFIG. 3 cover shell. -
FIG. 6 is an enlarged fragmentary cross-sectional view substantially taken on the line 6-6 ofFIG. 5 . -
FIG. 7 is an enlarged, fragmentary cross-sectional view substantially taken on the line 7-7 ofFIG. 5 . -
FIG. 8 is a pictorial view of a preferred embodiment of a molded plastics vent for which theFIG. 3 cover shell is intended. -
FIG. 9 showsFIG. 6 cover shell installed on a molded plastics vent like that ofFIG. 8 . -
FIG. 10 shows theFIG. 7 cover shell installed on a molded plastics vent of the type shown inFIG. 8 . -
FIG. 11 is an enlarged fragmentary cross-sectional view substantially taken on the line 11-11 ofFIG. 5 , and showing the cover shell installed on theFIG. 8 vent. -
FIG. 11A is a fragment ofFIG. 11 , but showing theFIG. 3 cover sheet tab at a starting position of installation on theFIG. 8 vent. -
FIG. 11B is similar toFIG. 11A , but showing an intermediate position of installation. - A vent 40 (
FIGS. 1 and 2 ) is here formed to function as a hose fitting. Thevent 40 is formed (preferably molded) of a suitable substantially rigid molded plastics material, such as nylon or polypropylene. The moldedplastics vent 40 includes a radially extendinghead 42, here in the form of a circular face plate. Thehead 42 has a radially outward facingedge 30 and a continuousperipheral edge portion 43 inboard of theedge 30. Thehead 42 is perforated by a pattern ofelongate ventilating slots 31 extending axially therethrough and laterally to theperipheral edge portion 43. Theslots 31 haveend walls 32 at theperipheral edge portion 43. The slots are separated byflanking straps 46 definingside walls 33 of theslots 31. Thehead 42 has front and backsides edge 30 and to which theslots 31 open. - The molded
plastics vent 40 also has a generallytubular base 50 extending substantially coaxially from theback side 21 of thehead 42 at itsperipheral edge portion 43. Thebase 50 is spaced inboard of the radially facingedge 30 by a coaxial, radially extending, rear facing, enclosure wall abutting,annular lip 49 and has a coaxial throughpassage 51 communicating with theslots 31. - In the embodiment shown in
FIGS. 1 and 2 , the generallytubular base 50 is circumferentially segmented to form circumferentially closely spaced, alternatinglock tabs 45 and lockingfingers 52, all of which extend axially rearwardly from the head back side at theperipheral edge portion 43. Thelock tabs 45 andfingers 52 are of arcuate, circumferentially extending cross-sectional profile. The rear edges of thelock tabs 45 are radially inwardly beveled at 47. - The
locking fingers 52 are located slightly radially outwardly from thelock tabs 45. Each lockingfinger 52 has one or more (here three) axially spaced, radially outwardly protruding, circumferentially extendingteeth 54 having a rearward and radially outwardly beveled, generally rearwardly facingsurfaces 56. Therearwardmost tooth 54 forms the rear edge of thebase 50 and its beveled surface 56 a extends the full radial thickness of the tooth. The rearward end portion of eachlocking tooth 52 is thickened to provide a slightly radially inwardly protrudinglip 60. Theteeth 54 andlip 60 extend circumferentially the width of thelocking finger 52. It will be understood that thelocking fingers 52, including theirlips 60, are spaced radially outward from the outer circumferential plane of thelock tabs 45 and preferably are circumferentially narrower than the circumferential spaces between thelock tabs 45. Circumferentially spaced, axially extending, reinforcing, rib-like webs 58 protrude radially outwardly from the radially outer face of thelocking fingers 52 between theback side 21 of thehead 40 and thenearest tooth 54. - The molded
plastics vent 40 can be used as an end termination for a ventilation hose 10 (FIG. 2 ), a ventilating member to provide a finished appearance for ahole 14 in awall 12, or both. In the embodiment shown, thehose 10 is formed of a flexible material in which a coiledwire 64 is embedded for reinforcement. The front (leftward inFIG. 2 ) end of the hose is forwardly inserted into the circumferentially continuous, radially narrow, annular space between thelock tabs 45 and lockingfingers 52 so as to closely approach or abut theback side 21 of thehead 42 of the moldedplastics vent 40, as permitted by the limited radial bending capability at least of thefingers 52. So installed, the radially inwardly protrudinglips 60 on thefingers 52 axially fix thehose 10 to the moldedplastics vent 40 and prevent unintended axial separation thereof. With an intermediate portion of thehose 10 extending through thehole 14 in thewall 12, rearward movement of the molded plastics vent 40 toward thewall 12, coaxially of thehole 14, inserts the generallytubular base 50 into thehole 14, such that theteeth 54 slide axially rearwardly along the peripheral edge of thehole 14, camming and bending thefingers 52 radially inwardly as needed, until the radially extendinghead 42 of thevent 40 abuts the front face of thewall 12, thereby completing installation as seen inFIG. 2 . - During installation, the tapered rearward surfaces of the
teeth 54 assist installation of thevent 40 in thewall 12, whereas after installation the forward facing radially planar faces of theteeth 54 resist removal of thevent 40 from thewall 12. The radially inward bending of thelocking fingers 52 by the peripheral edge of thehole 14 helps thelips 60 of thefingers 60 fixedly grip thehose 10 between themselves and the circumfererentially flankingtabs 45. - To the extent of above discussed, the apparatus is substantially that disclosed in the present assignees prior U.S. Pat. No. 5,588,908.
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FIG. 8 shows a furtherprior art vent 140 which may be generally similar to thevent 40 above discussed with respect toFIGS. 1 and 2 , except as follows. - For example, the head 142 (
FIG. 8 ) of thevent 140 has afront side 120 of shallow, convexly rounded shape. Thus, thestrips 146 have correspondingly somewhat convexly rounded front faces 147. - Turning now to aspects of the apparatus more directly dealing with the present invention, attention is directed to
FIGS. 3-11 . - A radially extending cover shell 201 (
FIGS. 3-5 ) is preferably of a decorative, corrosion resistant, relatively stiff material, such as sheet metal. In the preferred embodiment shown, thecover shell 201 is of stainless steel sheet. Marine grade stainless steel sheet is sufficiently corrosion resistant, even in salt water environments, as to maintain a decorative appearance over a long period of time. - The
cover shell 201 has a continuousperipheral edge portion 205 surrounding acentral portion 206 comprising a pattern ofslots 211 separating byelongate strips 206, whose edges define corresponding edges of the flanking slots. - The
cover shell 201 has a front face 220 (FIG. 3 ) and a back face 221 (FIG. 4 ). Thecover shell 201 is contoured three-dimensionally to continuously snugly cover, in a skin-like manner, the front side of the head of a corresponding molded plastic vent. Thus, in the embodiment shown, thecover shell 201 ofFIGS. 3-5 is three-dimensionally contoured to cover the convexfront face 147 of thecorresponding vent 140 ofFIG. 8 , it being understood that similar cover shells can be three-dimensionally configured to similarly fit, in a skin-like manner, the front face of the head of otherwise contoured vents, for example such as thevent 40 inFIGS. 1 and 2 above-described, thefront face 20 of which is not convexly rounded, but rather is flat (or might be concavely rounded if desired). - Returning to the
particular cover shell 201 shown inFIGS. 3 and 4 , same thus is contoured three-dimensionally in a shallow, cup-like shape having a convexly roundedfront wall 226 incorporating theslots 211 and strips 216 and a peripheral wall continued therefrom and terminating in aperipheral edge 228. - The
cover shell 201 is three-dimensionally contoured so that itsback side 221 can continuously abut the front face 147 (FIG. 8 ) of the supportingvent 140, in the manner shown inFIGS. 6, 7 and 9-11. In other words, thecover shell 201 is contoured to fit in a skin-like manner on the front of the supportingvent head 142. - The pattern of
slots 211 and strips 216 of thecover shell 201, as well as the size, shape and placement thereof, are preferably identical to those of theslots 131 and strips 146 of thecorresponding vent 140. Thus, with thecover shell 201 properly oriented on thefront face 147 of thevent head 142, thevent head 142 is to be entirely hidden from the front by thecover shell 201, as inFIG. 5 . Thus, thecover shell 201 is to cover the entire exposed portion (the front and periphery) of thevent head 142, including the front surfaces of thestrips 146, theperipheral edge portion 143, and the radially outwardly facingperipheral edge 130. Thus, at least as a casual observer, the external appearance of the vent assembly, comprising the moldedplastic vent 140 and covershell 201, is to be that of a monolithic metal (e.g., stainless steel) vent cast from molten stainless steel or machined from a block of stainless steel. This visual effect can be enhanced by reducing the visibility of the molded plastics vent 140. For example, by molding the plastics vent 140 of a black material with a non-shiny surface, the sidewalls 133 (FIGS. 8 and 9 ) of the vent head strips 146 may visually merge into the shadowed interior reaches of thevent slots 131. - In some embodiments, as for example shown in
FIG. 8 , at least some of the vent head strips 146 may be, as seen from the front, several times longer than their width. Despite this,such strips 146 may be made especially strong by providing same with substantial front-to-rear depth, as seen for example inFIGS. 8 and 9 , wherein thestrips 146 crossing the central portion of thehead 142, while laterally longer, are also deeper front-to-rear. On the other hand, thecover shell 201 is preferably of constant thickness sheet material and indeed very thin compared to any dimension of the vent strips 146. - Thus, to avoid accidental bending after the
cover shell 201 is formed, the longer cover shell strips 216 may be reinforced by one or more cross straps 234 (FIGS. 3-7 ) spanning one or more of theslots 211 and extending transversely from the flanking strips 216. A givencross strap 234 thus acts to prevent twisting (about its length axis) or bending (out of its plane or transversely into or away from a flanking slot) of the attachedstrip 216. So that the cross straps 234 do not significantly impede flow through theslots 211, the cross straps 234 are preferably minimized in number and length, so that the total frontal area of the cross straps 234 is small compared to the total frontal area of theslots 211. - The
cover shell 201 can be fixed to the front of thevent head 142 as desired, for example by adhesive bonding. However, in the preferred embodiment shown, thecover shell 201 is preferably securely but resiliently releasably snap-fitted to the front of thevent head 142 by its own monolithically integrated fastening structure. In the preferred embodiment shown, that fastening structure comprises resiliently bendable, cantilevered tabs 250 (FIGS. 3, 4 , 7, 8, 10 and 11) angled substantially rearwardly from edges of correspondingslots 211. Advantageously, thetabs 250 extend from ends 251 of one or more of theshell slots 211 and are hence rearwardly bent from inboard edges of theperipheral edge portion 205 of thecover shell 201.Such tabs 250 are thus located to extend into adjacent vent head slots 131 (FIG. 11 ), here at opposite ends of the two adjacent longest ones of thevent head slots 131. A given said tab 250 (FIG. 11 ) has aleg 254 extending rearwardly and positioned to lie along and adjacent the opposed venthead slot end 132.Such tab 250 further includes aheel 256 protruding from the free rear end of theleg 254 and positioned to lie laterally beyond the venthead slot end 132 and snugly behind the vent headperipheral edge portion 143 to lock thecover shell 201 against thefront face 147 of thevent head 142.Such tab 250 further includes afoot 258 extending rearward from the radially outboard end of theheel 256 and atoe 260 angled rearward and radially inward from the free, rear end of thefoot 258. - Applicants found that the
cover shell 201 can be inexpensively produced from stainless steel sheet by a stamping operation which separates thecover shell 201 from the surrounding portion of the parent metal sheet (not shown), removes material to form theslots 211 and flankingstrips 216, forms the mentioned cup-shaped configuration and forms and bends out of plane the mentioned tabs. - To install the
cover shell 201 on thevent 140, the cover shell is moved rearward toward the front of thevent 140 to cammingly engage the rear face of the toe 260 (FIG. 11A ) with the front inboard corner of the ventperipheral edge portion 143 at the appropriateslot end wall 132. Continued rearward displacement of thecover shell 201 causes thevent edge portion 143 to cam thecover shell toe 260 laterally inboard (leftward inFIGS. 11A and 11B ), resiliently bending thetab 250 leftwardly and allowing theheel 256 to slide rearwardly along the corresponding ventslot end wall 132 toward and past itsFIG. 11B partially installed position. Continued rearward displacement of thecover shell 201 brings same into the firm, face-to-face contact with thevent 140, as shown inFIGS. 9-11 , whereupon the resilientlybent tab 250 snaps its heel 256 (FIG. 11 ) laterally outward snugly behind thevent edge portion 143. With the tabs 250 (four being provided in the embodiment shown) thus deployed, same firmly and fixedly retain thecover shell 201 tightly against the front of thevent head 142, as generally shown inFIGS. 9-11 . - Thus installed, it will be noted that the back side 221 (
FIGS. 9-11 ) of thecover shell 201 tightly continuously abuts thefront side 147 of thevent head 142, with the continuousperipheral edge portion 205 of the cover shell mapping on the headperipheral edge portion 143 and the shellperipheral edge 228 lying flush with therear facing lip 149 of thevent head 142, as seen inFIGS. 9 and 10 . Moreover, the pattern ofcover shell slots 211 maps on the pattern ofvent head slots 131 in shape, size and relative location (FIGS. 9 and 11 ) and the cover shell strips 216 map on the vent head strips 146 in shape, size and relative location. Thus, the edges of theshell slots 211 are a substantially flush forward continuation of the walls of the corresponding head slots, so as to minimize disruption of air flow through thevent head 142 despite the covering thereof by thecover shell 201. In theFIGS. 3-11 embodiment, one or more of the cover shell strips 216 is relatively long and narrow, and one or more rigidifying cross straps 234 are integrated in thecover shell 201 and span one or morecover shell slots 211 andcorresponding vent slots 131 but, as indicated inFIG. 9 , the cross straps 234 are minimized in width and number, and so do not significantly, if at all, impede air flow through thevent 140. - In a preferred embodiment of the invention, the
cover shell 201 was stamped of grade 316 stainless steel sheet material of thickness about 0.5 mm, though use of similar material of thickness in the range 0.2-1.0 mm is contemplated. - The use of thicker material may be desirable where the cover shell is of greater diameter, has a more flat or otherwise less inherently rigid cross-sectional shape, has longer and/or
narrower strips 216, has longer and/or wider slots, or has fewer (or no), narrower and/or longer cross straps 234. The cover shell thickness may also be varied to compensate for variations in rigidity as between different cover shell materials. - While the
vent 140 and covershell 201 here shown by way of illustration have a pattern of substantially parallel, chordally extending,uniform width slots 211, the pattern ofslots 211 may be varied as desired in shape, size and relative location within the broader scope of the invention. For example, theslots 211 could take the form of a plurality of circular or irregularly shaped holes, and/or nonparallel (e.g. radiating) elongate openings as desired. - In accord with the present invention, the rigidity, frontal impact resistance, and resistance to denting of the
vent assembly cover shell 201. Thus, the thickness of thecover shell 201, including itsstrips 211, may be a very small fraction (e.g. 1/20 to 1/80) of the thickness of the vent head strips. For example, in the embodiment shown, the cover shell strip thickness is about 1/40th of that of the thickest vent head strips 146. - Thus, the
vent assembly - Although a particular preferred embodiment of the invention has been disclosed in detail for illustrative purposes, it will be recognized that variations or modifications of the disclosed apparatus, including the rearrangement of parts, lie within the scope of the present invention.
Claims (17)
1. A vent assembly, suitable for mounting in a hole in a wall of an enclosure, to vent such enclosure, and comprising;
a molded plastics vent having a radially extending head, said head having a radially outward facing edge and having a continuous peripheral edge portion inboard of said edge, said head being perforated by a pattern of elongate ventilating slots extending axially therethrough and laterally to said peripheral edge portion, ones of said slots having end walls at said peripheral end portion, said slots being separated by flanking strips defining sidewalls of said slots, said head having front and back sides separated by said radially outward facing edge and through which said slots open, said molded plastics vent having a generally tubular base extending substantially coaxially from said head back side at said peripheral edge portion, said base being spaced inboard of said radially facing edge by a coaxial, radially extending, rear facing, enclosure wall abutting, annular lip and having a coaxial throughpassage communicating with said slots;
a radially extending, decorative, corrosion resistant, sheet metal cover shell lying tight against said front side of said vent head, said shell having a continuous peripheral edge portion mapping on said head peripheral edge portion and a pattern of slots mapping on said pattern of vent head slots in shape, size and relative location, said cover shell slots being separated by strips substantially mapping on said vent head strips in shape, size and relative location, an edge of a given cover shell slot being a substantially flush, forward continuation of the adjacent edge of the corresponding vent head slot to minimize disruption of airflow through the vent assembly, said cover shell including resiliently bendable, cantilevered tabs angled substantially rearwardly from ends of ones of said shell slots and extending into adjacent vent head slot ends, a given said tab having a leg extending along and adjacent the opposed vent head slot end wall, a heel protruding from the free end of said leg beyond said vent head slot end and snugly behind said vent head peripheral edge portion and locking said cover shell on the front face of said vent head, a foot extending rearward from the radially outboard end of said heel, and a toe angled rearward and radially inward from the free end of said foot, said toe having a cover shell installing position bearing cammingly on the front of said vent head peripheral edge portion to assist snap-fit installation of said tab in its said vent head slot, said cover shell being contoured three dimensionally in a shallow, cup-like shape having a front wall incorporating said slots and strips and a peripheral wall covering said radially outward facing edge of said vent head to give the outside appearance of a solid metal vent, said peripheral wall having an enclosure wall approaching, free, peripheral edge rearwardly approaching the plane of said vent head annular lip.
2. The apparatus of claim 1 in which the axial thickness of said head strips and cover strips is approximately in the range of ratios 1/20 to 1/80.
3. The apparatus of claim 1 in which said cover is a stainless steel stamping.
4. The apparatus of claim 2 in which said front side of said vent head is convexly rounded and said cover shell is correspondingly convexly rounded and lies tight against said front side of said vent head.
5. The apparatus of claim 4 in which said head slots extend substantially parallel and widthwise of said head, said shell slots extending correspondingly parallel and widthwise of said head.
6. The apparatus of claim 1 in which said cover shell has at least one cross strap extending across at least one of said shell slots and between flanking strips, said strap connecting and minimizing deflection of said flanking shell strips.
7. The apparatus of claim 6 in which the width of said strap is at most substantially the width of a said flanking shell strip to minimize interference with flow through said head.
8. The apparatus of claim 1 in which the thickness of said cover shell is in the range 0.2 mm to 1.0 mm.
9. The apparatus of claim 8 in which the thickness of said cover shell is about 0.5 mm.
10. The apparatus of claim 1 in which said cover shall is of type 316 stainless steel sheet.
11. A vent assembly, suitable for marine use and the like, for covering a vent opening while permitting air flow therethrough, and comprising:
a vent comprising a radially extending head perforated by a pattern of ventilating holes extending axially therethrough, said holes being separated by flanking portions defining side walls of said holes, said head having front and back sides through which said holes axially extend, said head having a radially outwardly facing edge and a peripheral edge portion inboard of said edge;
a radially extending, decorative, corrosion-resistant, cover shell of substantially rigid sheet stock, said cover shell lying tight against the front of said vent head, said shell having a peripheral edge portion mapping said head peripheral edge portion and a pattern of holes mapping on said pattern of vent head holes in shape, size and relative location, said cover shell holes being separated by flanking portions substantially mapping on said vent head portions in shape, size and relative location, an edge of a given cover shell hole being a substantially flush, forward continuation of the adjacent edge of the corresponding vent head hole to minimize disruption of air flow through the vent assembly, said cover shell being fixed on said vent head, said cover shell forwardly and sidewardly covering said vent head.
12. The apparatus of claim 11 in which said cover shell has a rear facing peripheral edge and said vent head has a rear facing surface substantially flush with said cover shell rear facing edge, the latter two being adapted to substantially abut an environmental surface having a vent hole to be covered by the vent assembly.
13. The apparatus of claim 11 in which said vent is a molded plastics mass and said cover shell comprises a sheet metal stamping perforated by said holes, said sheet metal stamping including integral rearward extending fastener elements in snap-fit engagement with said mass.
14. The apparatus of claim 13 in which said fastener elements are tabs bent rearward from the peripheral portion of the sheet metal at edges of said holes, said tabs being elongate leaf spring-like elements, a given said tab comprising an elongate rearward extending leg received at the edge of a corresponding vent head hole, said leg extending rearward through said corresponding vent head hole and having a heel engaging a rearward surface of said vent head at said corresponding vent head hole end to positively hold said cover shell tight against the front of said vent head in a positive yet resiliently releasable manner.
15. The apparatus of claim 11 in which said vent head has a substantially dome shaped front portion, said cover shell being three-dimensionally shaped to conform to said dome shape, said cover shell continuously abutting and covering said vent head forwardly and sidewardly.
16. The apparatus of claim 11 in which at least ones of said vent head and corresponding cover shell holes are elongate slots.
17. The apparatus of claim 16 in which said cover shell slots are mutually parallel.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/051,896 US20060199493A1 (en) | 2005-02-04 | 2005-02-04 | Vent assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US11/051,896 US20060199493A1 (en) | 2005-02-04 | 2005-02-04 | Vent assembly |
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US20060199493A1 true US20060199493A1 (en) | 2006-09-07 |
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US11/051,896 Abandoned US20060199493A1 (en) | 2005-02-04 | 2005-02-04 | Vent assembly |
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