US2621594A - Universal combination fuel and vacuum pump - Google Patents

Description

Dec. 16, 1952 M. KATCHER 2,621,594

UNIVERSAL COMBINATION FUEL. AND VACUUM PUMP Filed Dec. 7, 1945 3 Sheets-Sheet l WJM ATI'OIIRNEY Dec. 16, 1952 M. KATCHER UNIVERSAL COMBINATION FUEL AND VACUUM PUMP Filed Dec.

3 Sheets-Sheet 2 INVENTOR fl/omP/f A? ram/P. WM

ATTORNEY Dec. 16, 1952 KATCHER 2,621,594

UNIVERSAL COMBINATION FUEL AND VACUUM PUMP Filed Dec. 7, 1945 5 Sheets-Sheet 5 ATTORNEY Patented Dec. 16, 1952 UNITED STATES PATENT OFFICE UNIVERSAL COMBINATION FUEL AND VACUUM PUMP Morris Katolier, New York, N. Y.

Application December '7, 1945, Serial No. 633,333

6 Claims.

This invention relates to a universal combination fuel and vacuum pump for use with internal combustion engines. Motors in use at present are madev to suit, in some instances, the location of the fuel pump on the upper level and the vacuum pump on the lower level and on corresponding levels all connections from the fuel tank to the carburetor via the pump as well as connections from the accessories, such as the windshield wiper, to the intake manifold via the pump. In the case of other motors conditions are reversed, the motors and said connections suiting a combined pump in which the fuel pump part is on the bottom and the vacuum pump part on the top. To satisfy both conditions, it has been necessary, heretofore to supply the replacement parts trade with two types of combination pump, one in which the fuel pump part was on top and the other in which the vacuum pump part was on top. To supply the replacement trade with only one type of prior art combination pump would require that in about half the cases, the installation of the pump would become a difficult task requiring an expert as well as extra and possibly special fittings. Accordingly it is an object of the present invention to provide a combination pump which will suit both of the conditions noted above, which pump does not require special skill and fittings to install, no matter which way it must be installed, that is either with the fuel pump on top or the vacuum pump on top. A further object, as an aid to the universality of the pump, is the provision of a detachable mounting or supporting bracket which is of such symmetry that it may be reversed with respect to the engine casing or the pump body. The provision of a plurality of sets of holes in the bracket and corresponding holes in the pump body permits the mounting of the pump on a number of different engines instead of requiring specially holed pumps for said different engines. Such a bracket could be standard for a group of motors, special brackets only being required for groups of motors, instead of individual types of motors.

To make it possible that the pump operate efiiciently in reversed positions, provision is made that the inner end of the operating lever is in such operative relation to the means extending between the diaphragms for effecting their strokes and the diaphragms themselves, that it reciprocates or rocks from a mean position which is suitable for either the fuel pump diaphragm or the vacuum pump diaphragm, no matter which diaphragm is on top. The inner end of the operating lever must bear a constant relation to the diaphragms, even if it is necessary that its outer end be varied to suit the driving means of the particular engine with which the pump is to be used, Further, the outer end of the operating lever should also be in a different relation to the driving means or cam where the combination pump is mounted with the fuel pump diaphragm on top than from where said diaphragm is on the bottom of the combination pump.

With the type of strainer or filter used, it is necessary that the bowl be on the bottom, so that it would not do to reverse the pump and with it the filter bowl. Accordingly, the overhanging portion of the fuel pump cover, that is the portion which supports the strainer bowl, is madewith a certain symmetry of parts, enabling the bowl to be mounted on either side of said cover no matter which way the cover is turned so that the bowl is always on the bottom.

A further object of the invention resides in the construction of the lost motion connection between the inner end of the operating lever and the means extending between the diaphragms.

Other objects and advantages will become apparent upon further study of the description. and drawings in which:

Fig. 1 is a front elevation of the combination fuel and vacuum pump.

mechanism being below and the fuel pumping mechanism being above. a

Fig. 3 is a sectional plan through thepump taken along the line 3-3 of Fig. 1, substantial-1y at the level of the pivot pin of the operating lever, the strainer being omitted.

Fig. 4 is a cross section of the strainer taken at right angles to section 2, and r Fig. 5 is a longitudinal section of the pump shown with the Vacuum pumping mechanism above, and the fuel pumping mechanism below, a portion of the housing of the vacuum pump being shown in elevation, a different operating lever being used from that shown in Fig. 2.

The pump has a central body portion or inter mediate member denoted in its entirety by the numeral 6. In Figs. 1, 2 and 4, the .fuelpump cover, denoted in its entirety by the numeral 1, is mounted on the top of intermediate member 6 by means of bolts 8, two of them only being shown in Fig. 1, the rest being omitted for clarity. Flexible diaphragm 9 of the fuel pump is clamped at its edges between flange It at the top of the intermediate member 6 and flange H of cover I defining fuel pump chamber 49. The central portion of diaphragm 9 is clamped between washers I2 and 13 which are held together by rivet l formed on the top of stem l4. Surrounding stem l4 below washer I3 is compression spring l6, the lower end of which abuts washer 3| while its upper end abuts washer l3. A readily removable mounting bracket I! is held to body portion 6 by means of screws l8 and the bracket in turn is held by bolts 82 to the engine mounting l9, fragmentally shown in dotted lines. Operating lever is pivotally mounted in bracket H by means of pin 2|, an extension 22 to the bracket on each side thereof being provided as a bearing for the pin. Body portion 6 is recessed to receive extensions 22. A readily removable and changeable mounting bracket with its operating lever permits the use of a standard pump body with different types of motors. Suitable brackets and levers are provided to take up the variation in the motors while the pump body remains standard. It is to be noted that the portion of lever 20 within housing 3 can remain standard, only the outside portion needing to be varied. This type of bracket and lever form the subject of my Patent No. 2,440,175. Lever 25 is formed of two sheet metal arms 23, Fig. 3, joined at their outer end by bridge piece 24, at pivot pin 2! by sleeve 25 and toward stem M by rivet 26. At pin 21, which extends through stem 14, lever 20 straddles the stem, an arm 23 coming on each side thereof. Each arm 23 of lever 20, is provided with a slot 28 in which pin 21 operates, said slot being elongated along the longitudinal axis of stem I4 to allow for lost motion of pin 21 with relation to said lever. The upper and lower edges of the inner ends of the arms 23 of lever 20 are provided with horizontally extending flanges 29 and 30. Flanges 29 engage the bottom of washer 3|, while flanges 30 engage the top of sleeve 32 in which the lower portion of stem I4 is slidably mounted. Bridge piece 24 at the outer end of lever 2|) is forced to ride on the surface of cam or eccentric 33 by the pressure of spring 34 Whose upper end engages body portion 6. Cam 33 is mounted on shaft 35 which is usually the cam shaft of the motor.

Supporting or mounting bracket I? is preferably made symmetrical with reference to a horizontal axis passing at right angles through the longitudinal axis of pin 2! at its center, so that it may be readily reversed with respect to body portion 6.

Vacuum pump diaphragm 39 is held between flange 38 of vacuum pump housing 31 and bottom flange 36 of body portion 6, said flanges being held together by bolts 43. Diaphragm 39 is held between washers 43 and 4|, said washers being held together by rivet 42 formed on the bottom of plug 43. Plug 43 is fixed in the lower portion of sleeve 32 by means of pin 44. A spring under initial compression, abuts at its upper end against washer 4| and at its lower end not seen, against vacuum pump housing 37 so that normally diaphragm 39 is moved to its upper position in a suction stroke only until the decrease in pressure in chamber 45 is sufficient to overcome the compression in spring 45.

When lever 20 is rocked by cam 33 so that its end at stem 14 is moved down, flanges 35 on its arms 23 bear down on the top of sleeve 32 forcing down diaphragm 39 for its compression stroke against the pressure of spring 45. As

cam 33 revolves, spring 34 pressing down on bridge piece 24, forces the inner end of lever 20 to swing up releasing sleeve 32 and allowing thereby spring 45 to push up diaphragm 39 for its suction stroke. Vacuum pump housing 31 is provided with an inlet and check valve 41 and an outlet and check valve 48. Inlet 41 is adapted to be connected to the vacuum motor of a windshield wiper, not shown. The suction developed by the vacuum pump cannot exceed that produced by the strength of spring 45. When the pressure in chamber 43 becomes lower than a predetermined amount, spring 45 is prevented from expanding. Under this condition, when lever 25 is rocked in a counter-clockwise direc tion, flanges 30 rise without corresponding rising of sleeve 32, that is there is lost motion in the connection of lever 25 and said sleeve.

Fuel pump cover 1 forms the upper wall of chamber 49 while its lower wall comprises diaphragm 9. Cover 1 is provided with an overhanging extension for holding glass strainer bowl 58 and providing an inlet passage 5|. To the outer end of inlet passage 5| is fastened an inlet connection 52 which leads to the fuel tank, not shown- A stop 53 is set across passage 5|, so that liquid entering said passage is blocked against further direct travel through the passage and forced topass through opening 54 into bowl 53. Opening 54 is threaded for a purpose explained later. Bowl 53 is pressed against gasket 55 by means of ball 56, sleeve 51 and U-headed bolt 87. Pressed between gasket 55 and a recess in cover I is annular screen 58. An annular chamiel 59 is recessed in cover 1 above screen 58, an opening 60 leading from channel 59 into passage 5| on the far side of stop 53. The top of cover 7 for its portion over bowl 555 is substantially a duplicate of its bottom. Opening 6| corresponds to opening 50. Channel 62 corresponds to channel 59. Threaded opening 53 corresponds to threaded opening 54. Screen 54 corresponds to screen 58, and gasket 65 corresponds to gasket 55. When bowl 511 is attached to the bottom of cover 1, its top is closed by plate 56 which is held against gasket 65 by means of bolt Bl screwed into hole 63. The reason for the duplication of the bottom conditions of cover 7 on its top is to be seen in Fig. 5 where the fuel pump mechanism of the combination or dual pump is on the bottom instead of on the top as in Fig. 2. While the dual pump may readily be inverted, and with it cover I, it is nevertheless necessary that the strainer bowl be kept below inlet passage 5|, so that the filtrate from the fuel can drop from the screen by gravity.

The filtered fuel, Fig. 2, passes through opening 63 into passage 5| on the farside-of stop 53. From passage 5! the liquid fuel passes through inlet check valve 68 into fuel pump chamber 49 upon the downward or suction stroke of diaphragm 3. Upon the upward or compression stroke of diaphragm 9, the liquid is forced through outlet check valves 39 and 70 in tandem, and from there finally out of outlet TI to the carburetor, not shown. The use of a pair of outlet check valves, such as shown, has been found by experiment to prevent the fuel from being discharged with pulsations. As is well known in the art, such pulsations are damaging to the carburetor and are uneconomical in the use of the fuel. Such check valves form the subject of the application of William Hicks and myself, Serial No. 619,710, now abandoned.

It is to be noted that springs l6 and 45 act in opposite directions on lever 23. In fact'at times, one spring will help the lever overcome the resistance of the; other spring, as just. after lever 29 hasfmishedits. compression stroke on vacuum pump diaphragm 39 and started to rock in a counter-clockwise. direction, spring 45 which had beencompressed during the compression stroke will. recover, forcing up diaphragm 39 and'with it sleeve 32 against lever 29, assisting the latter in pressing against spring Hi. In Fig, 2, both diaphragms 9 and 39 are at the upper limit of their stroke, compressionstroke for diaphragm 9 and suction stroke for diaphragm 39. This means'that the pressure in the fuel line, not shown, between outlet TI: and the carburetor. and in fuel pump chamber 49 is less than that required for spring it to yield, and that pin 21 is at the upper end of slots 28. in arms 23'. of lever 29. It also means that the vacuum created in vacuum pump chamber 46 is not great enough to. hold back diaphragm 39 against thev force of spring 45 so that sleeve 32 contacts. lever 29. Should. the pressure in .fuel pump chamber 39 in a subsequent compression stroke of diaphragm 9 be great enough to overcome the initial compression in spring Hi, the inner end of lever 29 will rise without corresponding rising of stem l4, so that pin 27 will be located in slots 28 below the upper end of said slots. In other Words, there will be lost motion between lever 29 and stem M. Under this condition, upon subsequent clockwise motion of lever 29, spring IE will help push the lever down against the resistance of spring 45 until the top of slots 28 engage pin 27. The reciprocation of diaphragm 9 by lever 29 through the intermediacy of spring I is also described in my Patent No. 2,440,175.

When the vacuum created in chamber 36 is sufiicient to overcome the expansive force of spring 45, sleeve 32 will not follow lever 29 When it rocks in a counter-clockwise direction. In other words there will be lost motion between lever 20 and sleeve 32. This insures that a vacuum in chamber 45 will not be created below a predetermined absolute pressure.

Both washer 3| and sleeve 32 are guided in their reciprocation by ribs 12 and the inside wall 13. Ribs 12 are formed on the inside of intermediate member 6 of the housing and wall 13 extends between walls M of member 9, see Fig. 3. A transverse strip 15 forms a partial Wall across the back of intermediate member 6. The space between the bottom of strip 15, that is opening 86, and the top of flange 36 is closed by removable plate 16 which is fastened to strip 75 by screw 1?. It is to be noted that intermediate member or portion 6 is substantially symmetrical, as far as its rear face is concerned, about screw ii in strip 15, so that when the pump is inverted, Fig. 5, plate 19 can be turned so that it extends between strip 15 and flange ID, that is over opening 88. In the particular embodiment of the invention shown, the longitudinal axis of screw 17 is in the same plane as the longitudinal axis of lever pivot pin 2|. Drain hole E8 in flange 36 and drain hole in flange it are symmetrically placed with respect to pin 2|. Likewise mounting bracket IT has suit; able symmetry to enable it to be inverted With respect to engine mounting l9 and intermediate member 6. This holds true, therefore, for the holes in said bracket and the corresponding tapped holes, not seen, in member 6 which screws |8 engage for fastening the bracket to said member. This holds true also for holes 8|, through which bolts 82 pass, Fig. l, for fastening the pump to the engine mounting or casing l9 and also for the pairs of holes 83 and 84, said pairs each being used with bolts 82instead' of holes 8| where engine mounting I9 is provided with holes to correspond.

The symmetry of bracket makes it. possible to, mount it in inverted position on member 6 or on engine casing I9. The symmetry of. member 6 makes it possible to invertv the pump as shown in Fig. 5, either by inverting the pump, as a whole including member 6, or leaving number '6 as shown in Fig. 2 without inversion: and mounting the vacuum pump housing 31 and diaphragm 39 on its; upper flange 10 and the fuel pump cover 1 and fuel pump diaphragm 9' on its lower flange 36.

Absolute symmetry is not required for the various inversions to be. effected, as for example the interiordetails of member 6 may be varied to a certain extent, that is to. say upper rib l2 might. differ somewhat from lower rib, 12, Fig. 2. The same holds true for walls 13 and 14. Even the diameter of fuel pump diaphragm 9 and the diameter of supporting flange ll] need not be the same, respectively as the diameter of vacuum pump diaphragm 39 and the supporting flange 36 in the case where the pumpv is inverted along with member 6. The desid'eratum is thatthe stroke of the inner end of the operating-lever, lever 20, Fig. 2, and lever 85, Fig. 5, is symmetrical with the maximum strokes of diaphragms 9 and 39. It is further desirable to have the outer end of the operating levers in such position with respect to cam 33', that there is a direct push exerted by the cam for effecting the suction stroke of fuel pump diaphragm 9 and for effecting the compression stroke of vacuum pump diaphragm 39. Spring 34. eifects the return stroke of said levers. For this reason, the outer. end of lever 29, with the fuel pump diaphragm 9 on top, Fig. 2, has a, different position relatively to its pivotal axis and cam'33 than has the outer end of lever 85, Fig. 5, relatively to its pivotal-axis and cam 33 when the fuel pump diaphragm 9 is on the bottom. But regardless of said difference in the relative positions of the outer ends of the operating levers, the stroke of their inner ends should bear a constant relation with the maximum strokes of diaphragms 9 and 39 in order for the pump to be reversible. In order not to upset the desired predetermined pressures in pump chambers 46 and 49 when the pump is reversed, the mean position of the strokes of the inner end of the operating lever should be substantially the same distance from the mean position of the strokes of diaphragm 9 as it is from the mean position of the strokes of diaphragm 39. This holds true, however, only for those strokes of both diaphragms which have their maximum possible amplitude, that is when the compression stroke of diaphragm 9 is not shortened because of pressure in excess of the predetermined pressure in the fuel line to the carbures tor and when the suction stroke of diaphragm 39 is not shortened because of a drop in pressure in vacuum chamber below that predetermined for it. Further, it is preferable for reversibility that member 6 be so constructed that a horizontalplane through the axis of pin 2| is the same distance from a horizontal plane containing the top of flange |0, ,2, as a horizontal plane containing the bottom of flange 36.

With the pump. in inverted position, as seen in Fig, 5, all the parts can be the same except. for lever- 85., which, as. was explained before,; should have. such a relationship to earn 39, pivot-pin 2| and the means 14 and 32 connecting diaphragms 9.and. 39' that earn .33: directly pushes said lever during :the; suction stroke. of fuel. pumpidiaphragm 9 and the compression stroke of vacuum pump diaphragm 39. Supporting bracket I! may or may not be the same depending on its fit to engine mounting l 9, but this does not affect the action of the pump.

Owing to the opening in engine casing or mounting l9, through which operating levers 2t and 85 pass, oil from the engine can enter the interior of member 6. For this reason drain holes 18 and 19 are provided in member 8 and drain holes 80 in bracket H. In Fig. 2, drain hole 18 is used to drain the interior of member 6 back into the engine, while with the pump reversed in Fig. 5, drain hole 79 is used. Plate 16 is set to extend" from strip 15 to flange 36 in Fig. 2, and is turned to extend from said strip to flange in Fig. 5. This enables whichever of openings 86 or 88 is at the bottom to be closed in accordance with which way the pump is turned and whichever of said openings coming above strip 75 to be clear. Closing lower opening 88, Fig. 2, prevents the escape of oil from the interior of member 6, while a free upper opening 88 prevents entrapment of air in the interior of said member. The entrapment of air inthe interior of member 6 would interfere with the proper functioning of diaphragms 9 and 39.

I claim:

1. A combined fuel and vacuum pump for use with driving means comprising a housing providing a fuel pump chamber and a vacuum pump chamber, a flexible diaphragm within the housing adapted to cooperate with the fuel pump chamber, a second flexible diaphragm within the housing adapted to cooperate with the vacuum pump chamber, a stem fastened to the fuel pump diaphragm and extending toward the vacuum pump diaphragm, and a member fastened to the vacuum pump diaphragm and extending toward the fuel pump diaphragm, an operating lever pivotally mounted on the pump and adapted to be rocked by the driving means, the lever positively engaging the stem for the suction stroke of the fuel pump diaphragm and positively engaging said member for the compression stroke of the vacuum pump diaphragm, said strokes being in opposite directions, a spring located in operative relation to the lever and the stem enabling the lever to press against the spring which in turn moves the stem and diaphragm for the compression stroke of the latter, and a spring engaging the vacuum pump diaphragm and the housing, said latter spring opposing the compression stroke of the latter diaphragm and effecting its vacuum stroke, said springs reacting against the lever in opposed directions.

2. A combined fuel and vacuum pump for use with driving means comprising a housing providing a fuel pump chamber and a vacuum pump chamber, a flexible diaphragm within the housing adapted to cooperate with the fuel pump chamber, a second flexible diaphragm within the housing in spaced relation with the first diaphragm adapted to cooperate with the vacuum pump chamber, means extending between the diaphragms having two portions adapted to have axial motion with respect to each other, said portions being mounted in the housing in substantially axial alignment with each other, one portion being fastened to the fuel pump diaphragm and the other portion being fastened to the vacuum pump diaphragm, an operating lever pivotally mounted on the pump and adapted to be rocked by the driving means, said lever engaging the means extending between the diaphragms with a lost motion connection, a spring, mounted on the portion fastened to the fuel pump diaphragm, having one end exert pressure against the lever, and having its other end exert pressure against the fuel pump diaphragm, and another spring having one end engage the housing on the opposite side of the vacuump ump diaphragm from the space between the diaphragms, the other end of the latter spring pressing said portion fastened to the vacuum pump against the lever effecting a positive suction stroke and a positive compression stroke of the fuel pump diaphragm only up to a predetermined increase of pressure in the fuel pump chamber and a positive compression stroke and a suction stroke of the vacuum pump diaphragm only down to a predetermined decrease in pressure in the vacuum pump chamber, said lever engaging each of the portions of the means extending between the diaphragms for at least a portion of the positive stroke of each diaphragm.

3. A combined fuel and vacuum pump for use with driving means comprising a housing providing a fuel pump chamber and a vacuum pump chamber, a flexible diaphragm within the housing adapted to cooperate with the fuel pump chamber, a second flexible diaphragm within the housing in spaced relation with the first diaphragm adapted to cooperate with the vacuum pump chamber, means extending between the diaphragms having two portions adapted to have axial motion with respect to each other, said portions being mounted in the housing in substantially axial alignment with each other, one portion being fastened to the fuel pump diaphragm and the other portion being fastened to the vacuum pump diaphragm, an operating lever pivotally mounted on the pump adapted to have its outer end engage and be rocked by the driving means, the inner end of said lever being provided with a longitudinal slot, the sides of the slot engaging a projection provided on one of said portions, and another part of said inner end engaging the other of said portions, lost motion being provided for in said engaging, effecting a positive suction stroke and a positive compression stroke of the fuel pump diaphragm only up to a predetermined increase in pressure in the fuel pump chamber and a positive compression stroke and a suction stroke of the vacuum pump diaphragm only down to a predetermined decrease in pressure in the vacuum pump chamher.

4. A pump for use with driving means, having a housing providing a fuel pump chamber and a vacuum pump chamber, a flexible diaphragm comprised in a wall of the fuel pump chamber, a

second flexible diaphragm comprised in a wall of the vacuum pump chamber, a sleeve fixed at one end to the vacuum pump diaphragm, the other end of the sleeve being free, a stem fixed at one end to the fuel pump diaphragm, the other end of the stem being slidably mounted in the free end of the sleeve, an operating lever pivotally mounted on the piunp and adapted to be rocked by the driving means, said lever pulling the stem when rocked in one direction, for moving the stem to produce a suction stroke of the fuel pump diaphragm, releasing the stem when the lever is rocked in the opposite direction, said lever pressing against the sleeve when rocked in said one direction, to produce the compression stroke of the vacuum pump diaphragm, and releasing the sleeve when rocked in said opposite direction, a spring reacting between the lever and the fuel pump diaphragm enabling the lever to effect the compression stroke of the fuel pump diaphragm, and a spring engaging the vacuum pump diaphragm and the housing, said latter spring opposing the compression stroke of the vacuum pump diaphragm and effecting its vacuum stroke, said springs producing pressure against the lever in opposed directions.

5. A combined fuel and vacuum pump for use with driving means comprising a housing providing a fuel pump chamber and a vacuum pump chamber, a flexible diaphragm within the housing adapted to cooperate with the fuel pump chamber, a second flexible diaphragm within the housing in spaced relation with the first diaphragm, adapted to cooperate with the vacuum pump chamber, means extending between the diaphragms having two portions adapted to have axial motion with respect to each other, one portion being fastened to the fuel pump diaphragm and the other portion being fastened to the vacuum pump diaphragm, anoperatingleverpivotally mounted on the pump and adapted to be rockedby the driving means, said lever positively engaging the portion fastened to the fuel pump diaphragm for the suction stroke of the fuel pump diaphragm, a spring reacting at one end against the fuel pump diaphragm and at the other against the lever, said lever effecting the compression stroke of the fuel pump diaphragm through the intermediacy of the spring, said spring being under sufiicient initial stress to produce a positive compression stroke of the fuel pump diaphragm until a predetermined pressure in the fuel pump chamber is exceeded, the lever positively engaging the portion fastened to the vacuum pump diaphragm for the compression stroke of the vacuum pump diaphragm, and a spring engaging the vacuum pump diaphragm and the housing, said latter spring opposing the compression stroke of the vacuum diaphragm and effecting its vacuum stroke, said springs reacting against the lever in opposed directions.

6. A combined fuel and vacuum pump for use with driving means having a housing comprising an intermediate member and a removable cover for each end of said member, the relative construction of the covers with respect to the member enabling them to be fastened to either end of the member, said housing providing a fuel pump chamber and a vacuum pump chamber, a flexible diaphragm comprised in one wall of the fuel pump chamber, a second flexible diaphragm comprised in one wall of the vacuum pump chamber, the diaphragm being fastened to opposite ends of said member, one of said covers being fastened to said member at one end cooperating with the fuel pump diaphragm to complete the fuel pump chamber and the other of said covers being fastened to said member at the other end, cooperating with the vacuum pump diaphragm to complete the vacuum pump chamber, means extending between the diaphragms and fastened to them, an operating lever pivotally mounted on the member and adapted to be rocked by the driving means, said lever engaging the means extending between the diaphragms for effecting their reciprocation, one of said covers being provided with a lateral extension, a strainer for fuel entering the pump having a bowl depending from said extension, the bowl being fastened to the underside of said extension under an opening therein in communication with the fuel pump chamber, the underside of the extension being formed to engage the rim of the bowl in fluid-tight engagement, said extension being provided with a second opening above the first opening, the second opening also being in communication with the fuel pump chamber, the upper side of said extension being formed also to fit the rim of the bowl for a fluidtight engagement therewith, and a removable closure fastened to the upper side of said extension in fluid-tight engagement therewith in the place where the rim of the bowl would fit, said closure also fitting said first opening.

MORRIS KATCHER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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