US2222869A - Pump - Google Patents

Description

Nov. 26, 1940. s. JENclcK 2,222,869

PUMP

Filed May 27, 1957 v n 4 an nz@ 39V ATTORNEY l Patented Nov. 26, 1940 UNITED STATES PATENT oFFlcE 6 Claims.

This invention relates to the art of devices for pumping liquid, and the present embodiment of my invention, as herein illustrated, is intended fory use in pumping the liquid gasoline to the carburetor of an internal combustion engine.

The object of this invention is to devise such a pump that will supply the liquid only at the rate required.

More specically, the object is to provide such a pump with means for automatically varying the effective stroke of the same in accordance with the rate of consumption, as for instance, by the carburetor of an internal combustion engme. A still more specic object is to devise such a pump in which a permanent magnet and armature are employed as a means for operating a flexible diaphragm for pumping fthe liquid at a variable rate according to the rate required. so Another object is to provide an improved form of flexible liquid-proof diaphragm for use in connection with the pumping of liquid.

Other objects will appear from the following description and claims when considered together with the accompanying drawing.

Fig. l is a top plan view of my improved pump;

Fig. 2 isa vertical sectional View corresponing with line 2 2 of Fig. i; and

Fig. 3 is a view corresponding to line of Fig. 1, the upper part being in elevation and the lower partbeing in section.

It is to be understood that the present form ci disclosure is merely for purposes of illustration and that -there may be devised other forms of construction without departing from the spirit of the Present invention as herein set forth and claimed.

As above indicated, my present improved form of` pump may be employed in connection with an' 0 internal combustion engine; in which case, the pump is inserted in the gasoline supply line so as to pump the gasoline to the carburetor, as will be readily understood. 'Since this general arrangement is quite familiar to those who are skilled in this art, it is deemed unnecessary to illustrate the same.

In the case of 'an` automobile internal combustion engine, the gasoline feed pipe is connected to the inlet opening l of the present form of pump, and the outlet opening 2 is connected to the gasoline feed pipe which leads to the carburetor. The inlet I and outlet 2 are provided in the upper part 3 of the casing, the lower part of which is indicated by reference numeral the pont lt through the screw plug ll.

(Cl. 10S-150) 4. The upper and lower parts of the casing are bolted together, as indicated at the points 5.

The passage 6 from the inlet I opens upwardly into a chamber 'l within which the gasoline flow can be viewed through the glass closure 8 as it is being supplied through the pump. The closure 3 is secured in place b-y means of the bail clamp 9 which can be freedby removing the screw l, whereupon the bail can be swung upwardly about its pivot point H. The glass lclo- 10 sure 8 rests within a seat provided in the casing member and its edge engages and maintains in place the ring washers l2 of cork or the like, between which the wire mesh screen i3 is held in position. Thus the gasoline passes throughl l5 the screen i3 as it is forced through the pump.

The inlet disk valve ifi has the coil spring l5 which holds it normally in closed position over This valve, when open, permits communication 20 through the port iii and its companion port ill which opens into the chamber 2t.

The outlet valve disk 2li is normally held in closed position over the outlet port 2l by the spring 22, this port 2l having communication 25 with its companion port 23 when the valve 2li is open.

The disk valves il and 2li may both be of polygonal form so as to facilitate the passage of the liquid about the edge thereof when opened, 30 the port openings being of circular form.

it will be observed from the drawing that the upper and lower parts of the casing il and are so formed as to enclose the operating parts to be further explained, and alos to aord a 3y chamber Within the chamber 2L? there is provided the diaphragm which is flexible and which is clamped about its edge portion between the upper and lower parte d and d of the casing. The composition and process oi' making the membrane of the diaphragm will be explained below.

The cupped metal disks 26 and 2l are secured to opposite sides of the diaphragm 25-by means of the rivet pin 2Q and the spacer block 29 which is arranged between the disk 2l and the armature 30 for fthe magnet 3l.

The magnet 3l is a permanent magnet of U- shape and with portions extending inwardly from 50 the upper ends o-f the arms or sides thereof, .as clearly seen in Fig. 2 of the drawing. There is a space left between these inwardly extending portions so as to accommodate the spacer block 29 for free relative movement with respect there- 55 to, as will be explained. The armature 30 is wider than the space just referred to and is adapted for operative engagement with the under surfaces of the inwardly extending arm portions of the magnet 3l.

The magnet 3| is adapted for up and down movement within the casing, this movement being effected by means of the lever 32 with its cylindrical bearing portion 33 mounted for rocking movement in the wall of the casing. This lever is operated by means of the cam 34 on the cam shaft which is connected with the engine of the automobile. As will be seen, the effeot of the cam 34 is to raise the inner end of the lever 32 which will be returned to lower position by the coil spring 35 suitably mounted within the casing.

'I'he inner end of the lever 32 has a forked portion which extends beneath the magnet 3l and about the rivet pin 3S which in turn connects the saddle member 31 to the under-side of the magnet. I'his arrangement permits raising of the magnet by the action oi the cam 34 and lowering of the same by the action of the spring 35.

'I'his pump, as a unit, is adapted to be mounted upon the automobile engine block by means of the attaching plate 38, and the lever 32 will extend to the inside of the engine for operation in the manner explained.

'I'he lower part 4 of the casing is formed with the heat-radiating fins 39 in the region where the casing is mounted upon the engine block, this provision/ being for the purpose of dissipating the heat from the engine so as not to affect the magnet and also to preclude the formation of vapor lock in the supply line of the gasoline. There is provided also an opening 40 in the wall of the lower part of the casing so that air will be drawn into and discharged from the magnet chamber, this being also for cooling purposes.

The membrane of the diaphragm 25 consists of duck cloth impregnated with a combination of tung oil and soya bean oil, as will be now more fully explained. This oil combination is made up of about 47% per cent of tung oil, about 471/2 per cent of soya bean oil and about 5' per cent of vegetable pigment, as for instance Vermilion; and these ingredients are mixed together so as to form a paste. The duck is impregnated with this paste and is then baked in any suitable manner, as for instance by passing the same between heated rollers under pressure so as to cause the paste to become fixed in the duck.

Thus there is obtained a liquid-proof membrane that will be found to possess a marked flexibility even when made comparatively thick. That is, the increase in the thickness of the membrane does not defeat its flexibility to the same proportion as has been found to be true in other such membranes.

Also, my improved fo'rm of membrane will retain its flexibility throughout a wide range of temperature-from approximately 30 degrees below zero to approximately 335 degrees above zero, Fahrenheit.

Furthermore, in my new membrane there is no appreciable contraction or expansion under varying conditions, and thus it remains constant with respect to tautness and its action is likewise always constant and dependable.

The operation of my pump will now be explained. The parts are so constructed and arranged that downward movement ofthe diaphragm will open inlet valve. I4 and maintain outlet valve 20 closed so as to draw gasoline into the chamber above the diaphragm; and when the diaphragm is moved upwardly, the inlet valve will be closed and held closed and the gasoline will be forced out through the outlet valve 2U.

The magnet and other parts, as indicated in the present drawing, are in lowered position, and it is assumed that gasoline has been drawn into the chamber above the diaphragm. Then upon operation of the lever 32 by the cam shaft, the magnet will be raised and it will carry the armature with it by virtue of the magnetic field. This upward movement of the armature 30 causes actuation of the diaphragm upwardly so as to force the gasoline out through the valve 2U to the carburetor.

The length of stroke of the magnet is constant but the length of stroke of the armature and diaphragm is a variable dependent upon the degree of resistance oiered by the gasoline, which in turn is determined by the rate at which the gasoline is used by the carburetor at any given time. In case of the comparatively low rate of gasoline consumption by the carburetor, that is less than the capacity of the pump for a given rate of operation of the cam shaft, then there will be more or less backing up of the gasoline in the supply line from the pump to the carburetor.

In my device, the parts are so constructed and arranged that such pressure resistance may overcome the force of the magnetic field and the magnet will continue the latter part of its upward stroke without the armature. The point at which this separation of the armature from the magnet takes place, will be determined by the amount of pressure oiiered to the further up ward movement of the diaphragm; in other words, it is determined by the ratio between the rate oi supply and the rate of consumption of the gasoline at any given time.

As the magnet is lowered by the action of the spring 35, the diaphragm will be lowered thereby by virtue of the engagement of the inwardly extending magnet arms with the armature, and the parts will again assume the position indicated in me present drawing. The length of the return stroke of the diaphragm, as just described, will also determine the quantity of gasoline that is drawn into the chamber above the diaphragm. Thus, the return stroke as well as the up stroke will be a variable.

Thus, with my device the gasoline will be pumped at the rate required according to the demand upon the carburetor at any given time. This means that there will be a most efficient and dependable pumping of the gasoline since it will be supplied to the carburetor only as required; and this means also as increased economy.

Another advantage relates to the character of -the flexible material provided for use in connecthe gasoline in through the valve I4. Also, the

same thin form of membrane will likely be collapsed in the opposite direction by the resistance of the gasoline when it is being expelled from the pump to the carburetor. As a result, the effectiveness and dependability of such a thin form of membrane are reduced to a` substantial extent and thus the rate of supply of the gasoline by the pump can not be relied upon with any degree of assurance.

In my device; however, the membrane is of such a character that it can be made thicker so as to preclude the danger of collapsing; while at the same time, this comparatively thick membrane possesses sufcent exibility to ensure proper functioning of the diaphragm in the manner herein set forth.

While, for the sake of a clear understanding of my present invention, I have herein described it as being used in connection with an automobile engine, it is to be understood that this pump may be employed in connection with other liquids and as part of other devices.

What I claim is:

l. A liquid pump comprising a. casing adapted for connection in the liquid supply line, means operatable back .and forth Within the casing for pumping the liquid therethrough, a permanent magnet operatable back and forth, an armature carried by said pumping means and adapted for actuation by said magnet, and means for operating said magnet.

2. A liquid pump comprising a casing adapted for connection inthe liquid supply line, means operatable back and forth Within the casing for pumping the liquid therethrough, a permanent magnet operable back and forth, an armature carried by said pumping means and adapted for actuation by said magnet, and means for operating said magnet, there being a predetermined magnetic force between the magnet and armature adaped to permit separation of the same upon encountering a predetermined liquid pressure resistance by the pumping means.

3. A liquid pump comprising a casing adapted for connection in the liquid supply line, a reciprocatable diaphragm within the casing for pumping the liquid therethrough, a reciprocatable permanent magnet Within the casing, an armature carried by said diaphragm and adapted for actuation by said magnet, and means for operating said magnet, t ere being a predetermined magnetic force between the magnet and armature adapted to permit separation of the same upon encountering a predetermined liquid pressure resistance by the pumping inea ns.

Ll. A liqu pump lornprising a casing adapted for connection in the liquid supply line, inlet and outlet one-way valves in said casing for conu trolling the flow of liquid into and out of the same, a reciprocatable diaphragm Within the casing for pumping the liquid into and out of the same through the valves, a reciprocatable permanent magnet within the casing, an armature carried by said diaphragm and adapted for actuation by said magnet, and means for operating said magnet, there being a predetermined magnetic force between the magnet and armature adapted to permit separation of the same upon encountering a predetermined liquid pressure resistance by the pumping means.

5. A liquid pump comprising a casing adapted for connection in the liquid supply line, a reciprocatable diaphragm Within the casing for pumping the liquid therethrough, a reciproeatable permanent magnet Within the casing, an armature carried by said diaphragm and adapted for actuation by said magnet, means for operating said magnet, and said casing having an opening in the Wall thereof so as to permit the entrance and exit of air therethrough into and from the interior of the casing for cooling the same.

6. A liquid pump comprising a casing adapted for connection in the liquid supply line, a reciprocatable diaphragm Within the casing for pumping the liquid therethrough, a reciprooiatable permanent magnet Within the casing, an armature' carried by said diaphragm and adapted for actuation by said magnet, means mounted in the wall of the casing for operating said magnet, and heat-radiating means provided upon the casing in the region of said operating means for the purpose of preventing over-heating of the same.

STEPHEN J ENCICK.

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