US3841796A - Differential mounted single stage diaphragm operated pump - Google Patents

Differential mounted single stage diaphragm operated pump Download PDF

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US3841796A
US3841796A US30733172A US3841796A US 3841796 A US3841796 A US 3841796A US 30733172 A US30733172 A US 30733172A US 3841796 A US3841796 A US 3841796A
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means
housing
chamber
head portion
compressor
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M Schlanzky
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Motors Liquidation Co
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Motors Liquidation Co
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Priority claimed from US41350373 external-priority patent/US3898892A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B45/00Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms

Abstract

An air compressor having a diaphragm-piston connected to a cam operated push rod for producing a single stage compression of air through a wide range of desired static pressures in accordance with the position of an open ended housing in a support fixture which positions the push rod with respect to the high point of a cam operator to maintain a predetermined clearance volume within the pumping chamber of the compressor. Clearance volume is held by means of a clamp device for fixedly securing the axially adjusted compressor housing with respect to the cam operator.

Description

United SKaEQS atent 1 1 Schlanzlry Oct. 15, 1974 [54] DIFFERENTIAL MOUNTED SINGLE STAGE 3,151,568 10/1964 Hood et al .1 92/100 DIAPHRAGM OPERATED PUMP 3,168,855 2/1965 Randol 92/100 3,199,458 8/1965 Hochn 417/311 [75] Inventor: Manfre P- H- hl n ky, 3,252,424 5/1966 Johnson et a1 417/471 Frankenmuth, Mich. 3,375,972 4/1968 Ruuceisen r 92/605 [73] Assigneez G e Mo s po tio 3,650,182 3/1972 Phillips 92/165 Detrolt Mlch' Primary ExaminerWilliam L. Freeh [22] Filed: Nov. 16, 1972 Assistant Examiner-Gregory P. LaPointe [21] pp No: 307,331 Attorney, Agent, or Fzrm-Charles R. White [57] ABSTRACT C 417/274 92/ An air compressor having a diaphragm-piston con- 58 d 1 472 311 nected' to a cam operated pushv rod for producing a 1 g 21 13 7 531 100 60 f 123748 5 single stage compression of air through a wide range of desired static pressures in accordance with the position of an open ended housing in a support fixture [56] References'clted which positions the pushrod with respect to thehigh UNlTED STATES AT point of a cam operator to maintain a predetermined 862,867 8/1907 E leston 417/395 clearance volume within the pumping-chamber of the 1,896,098 2/1933 Foyer 123/48 compressor. Clearance volume is held by means of a Knudsen C clamp device for fixedly ecuring the axially adjusted 2956738 10/1960 92/605 compressor housing with respect to the cam operator. 3,035,676 5/1962 Nallinger r 417/470 I 3,095,824 7/1963 Elfes 417/471 4 Claims, 5 Drawing Figures a6 5 10 62 :20 15a 3 1 411 87 M 54 15s 53 w a2 72 50 I40 I28 126 151 2117b 6! w 52 {as so t i DIFFERENTIAL MOUNTED SINGLE STAGE DIAPHRAGMQPERATED PUMP This invention relates to air compressor and more particularly to air compressors of the type including a dry-diaphragm-piston which is operated through a short stroke to produce a single stage compression of fluid.

Compressed air systems used on vehicles include cam operated single stage dry diaphragm-piston compressorsproducing high volume dischargeof compressed air for use in the systems. The advantage of such arrangements is that the diaphragm pistoncombination has desirable life characteristics and eliminates the need for lubricating friction surfaces of the type found between piston and cylinder compressor units.

Atypical diaphragm piston cam operated single stage compressor has a fixed volumetric capaeitythat only can bevaried by changing the volume of a pumping chamber within the device.

Certain of single stage compressors-have an oil chamber on one side thereof through which oil is circulated to produce a pumping action on the diaphragm piston.

The present invention is directed to a compact, shortstroke diaphragm-piston air compressor that is cam operated to produce a single stage compression of fluid wherein the diaphragm pistonis operated without circulating oil into and out of an oil-pumping chamber on one side thereof and wherein the diaphragm piston assembly is operated through an improved cam driven push rod assembly for producing positive compressor operation. v

An object'of the present invention is to improve single stage diaphragm piston type compressors by the provision therein of an open-ended compressor housing that is adapted to be adjustably mounted with respect to a support pedestal having cam operated means therein so as to vary the length of stroke of a push rod to control clearance volume on the air side of the diaphragm piston thereby to control the maximum static pressure of the system.

. 2 ing push rod assembly which is spring 'biased interiorly of the differential housing into operative engagement with the cam.

The housing includes an opposite open end thereon closed by an improved dry operated piston and diaphragm assembly. More particularly, the diaphragm is supported at one surface thereof by a protector plate having a peripheral edge for supportingly receiving the diaphragm adjacent a hinge peripheral edge thereon. The protector plate further includes a central connector portion thereon secured to the push rod and a plurality" of circumferentially located rivets thereon each supportingly received within a counterbored opening through the piston and having head portions on the rivet deformed to fill an exposed pumping surface of the piston that is reciprocated by the piston into and out of a pumping chamber formed in a combination valve plate and cylinder head member. 1 The axial position of the compressor housing within the differential housing support fixture will locate the push rod with respect to the cam so that maximum amount of push rod stroke can be varied. Axial location of the push rod will cause the peak of the piston stroke to occur away from the top surface of the pumping chamber so as to increase clearance volume and consequently lower the static pressure capability of the compressor.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to accompanying the drawings, wherein a'preferred embodiment of the invention is clearly shown.

' the present invention;

Yet another object of the present invention is to provide an improved easily assembled, compact, short stroke diaphragm-piston single-stage air compressor having an open ended housing closed by an improved piston diaphragm assembly which includes protector plate means for protecting the diaphragm and for securing a piston for reciprocation by apush rod assembly which extends through one ofthe open ends of the compressor housing and wherein a combination pumping chamber and valve support plate is secured to the other open end of the compressor housing to form a pump chamber with the diaphragm piston assembly which can have the clearance volume therein adjusted by axial positioning of the open end of the housing and the push rod operator therein with respect to a drive support fixture including cam drive means therein for operating the push rod of the assembly.

These and other objects of the present invention are attained in one working embodiment which has a differential housing with a rotatable cam located therein for operating the compressor and wherein a support fixture is formed on the differential housing including an axial bore therein for supportingly receiving an axially positioned extension on an air compressor housing. The extension is open-ended and supports a reciprocat- FIG. 2 is an enlarged vertical sectional view taken along the section line 2--2 of FIG. 1;

FIG. 3 is a fragmentary sectional view showing a further embodimentof the present invention;

FIG. 4 is a view in vertical section taken along the line 44 of FIG. 3 looking in the direction of the arrows;

and

FIG. 5 is a section along line 5-5 of FIG. 4.

Referring now to FIG. 1, a rear suspension 10 of a vehicle is illustrated including a chassis frame having side members 12, 14 joined together by a cross frame member 16 that overlies an unsprung axle housing 18.

Primary suspension springs (not shown) have their upper ends supported on bracket seats 20, 22 on the cross member 16. These springs support the chassis frame in sprung suspension on the axle housing 18. Ground engaging wheel assemblies 24, 26 are each driven by an axle 28. The axle in turn is operatively associated with differential gear means within a differential housing 30 located midway of the axle housing 18. Drive to the differential housing 30 is through a propeller shaft 32 connected to a differential pinion 34.

A supplemental load supporting air spring device 36 is supported between a ledge 38 on the differential housing 30 and the cross member 16. It is selectively inflated by air supply from an improved air compressor and drive assembly 40 constructed in accordance with certain principles of the present invention.

The assembly 40 includes a compressor 42 having an inlet fitting 44 thereon connected'to a conduit 46 which is communicated with the exhaust from the air spring assembly 36 for returning air from the air spring to the compressor during system operation. The compressor further includes a high pressure discharge fitting 50 connected to a supply conduit 52 through which air is supplied to an inlet or inflation port on the air spring assembly 36.

In accordance with certain principles of the present invention, the compressor and drive assembly 40 is operated only in response to vehicle operation when the cam pinion 34 is operated to drive'a cam 53 connected thereto. The cam 53 operates a compressor drive mechanism 54. The compressor drive mechanism 54 operates a combination diaphragm and piston assembly 56 with respect to a valve and pumping chamber assembly 58 which includes means for controlling fluid flow into and out of compressor 42 so as to produce a continuous flow of compressed air into the air spring 36 during vehicle operation.

A valve mechanism (not shown) in the air spring assembly 36 is operated to bleed excess air flow from the air spring 36 during continuous flow of compressed air thereto. The excess air flow is thence discharged and returned through the inlet conduit 46 to complete a closed loop continuous operation.

For purposes of the present invention. the aforedescribed description of the system will suffice. For further details ofthe closed loop system of this type, reference may be had to copending United States application Ser. No. 307,378 Filed Nov. 17, 1972, by Robert E. Owen, entitled Leveling System with Center Mounted Air Spring.

One feature of the present invention is the manner in which the compressor 42 is mounted with respect to the differential housing 30. The differential housing 30 more particularly includes a side mounting flange 60 which has an axial bore 62 therethrough. A tubular extension 64 defines one open end on a compressor housing member 66. It is supportingly'received within the bore 62 and is sealed with respect thereto by an O-ring 68 supported in the extension 64 to be located in sealing engagement with the surface of bore 62. The extension 64 is axially positionable within the bore 62 so as to locate the spherical end 70 of an elongated push rod 72 of the drive mechanism 54 axially with respect to the bore 62.so as to be either spaced from or located in engagement with the low point of the cam 53. The compressor shell or housing 66 is then fixedly secured with respect to the flange 60 by suitable clamp means to maintain the desired stroke relationship. By controlling the length of stroke of the push rod 72, the piston and diaphragm assembly 56 is positioned at the end of the stroke so that the piston will be spaced closer or farther away from the top of a pumping chamber 74 formed in the combination valve and cylinder head 58. The positioning of the peak of the piston stroke with respect to the'pumping chamber surface will produce a controlled clearance volume which constitutes the amount of air remaining in the pumping chamber 74 when the piston and diaphragm assembly 56 has reached the peak of its stroke. By spacing the peak of the stroke away rom the top surface of the pumping chamber 74 the clearance volume will be increased to cause a controlled reduction of the maximum static pressure output of the compressor. In order to adjust the compressor 40 with respect to the cam 53 to control the amount of volumetric efficiency the compressor is forced against the high point of the cam 53 until the diaphragm piston assembly 56 is in solid contact with an upper surface 76 of the pumping chamber 74. An axial force 77 is gradually removed from the pump installation and an indicator will establish a calculated piston position to maintain a desired clearance volume required to produce a given static output pressure. At this point, the air compressor is fastened securely in its axial location so as to maintain the desired clearance volume control.

In the illustrated arrangement, the compressor housing 66 is sealed with respect to the flange 60 following adjustment by means of a large diameter resilient O- ring 78 seated between the end of flange 60 and a shoulder 79 on housing 66.

The compressor housing 66 includes an inner opened end 80 in which is supportingly received a bearing sleeve 82 elongated to extend outwardly of end 80. More particularly, the bearing sleeve 82 includes a head portion 84 having the outer periphery thereof supported within the end opening 80. It in turn includes a plurality of circumferentially spaced holes 86 therein. In one working embodiment there are nine circumferentially spacedholes that provide unrestricted flow of air through the end opening 80 to and from an open end 87 on the opposite end of the housing 66 closed by the piston and diaphragm assembly 56 and located to permit suction movement of the assembly 56 with re spect to the housing 66.

The piston and diaphragm assembly 56 seals the opened end 87 and is connected to the push rod 72 to be reciprocated thereby into and out of the opened end 87 and into and out of the pumping chamber 74 to produce a single stage compression of fluid on one side of the assembly 56. v

The assembly 56 more particularly includes a protector plate 88 which has a tubular extension 90 centrally formed on one side thereof which is rolled inwardly at 92 to interlock within a groove Men the end of the push rod 72. Radially outwardly of the central connector 90 the plate 88 has a plurality of circumferentially formed rivets integrally located thereon each directed through a countersunk opening 96 within a piston disc 98. Head portions 100 on each of the rivets 94 are de formed so as to form a flat continuously level surface at each of the countersunk openings 96 which define a continuous uninterrupted surface across the full planar extent of the front 102 of the piston disc 98.

A flexible diaphragm 104 in the assembly 56 is supported between the protector plate 88 and the rear surface of the piston-disc 98. It has a radially outwardly located hinged edge 106 thereon held in sealing engagement between an annular flange 108 on the housing 66 and an annular end face 110 formed on the valve and cylinder head 58. The edge 106 is secured in sealing relationship therebetween by a sheet metal cover 114 that has a radially inwardly bent edge 116 thereon overlying a chamfered surface 118 on the outer surface of the housing 66. It further includes an outer wall portion 120 which is located against an annular outer face 122 of the head 58 where it is sealed by an O-ring 124. This defines a high pressure cavity 126 that is communicated through a tube member 128 with the high pressure fitting or discharge fitting 50. Within the high pressure chamber 126 is located a discharge valve disc I30 having its outer periphery overlying and closing a plurality of circumferentially located discharge openings 132. The disc is held in place by a rivet 134 to seal the discharge openings 132. Upon movement of the piston disc 98 into the pumping chamber 74 fluid is compressedto act on the valve disc 132 to force it into supported relationship with a deflector plate 136 so as to flow from the pumping chamber 74 through the discharge openings 132 thence through the tube 128 and outwardly of the discharge conduit 52. This compression stroke is produced by rotation of the high point of the cam 36 against the spherical surface 70 on push rod 72. The compression'stroke or return stroke of the push rod 72 is produced by a return spring 138 which is of conical configuration including a small diameter end 140 thereon supported against a retaining ring 142 on the end of the push rod 72. A' large diameter end 144 of the spring surrounds the bearing sleeve 82 and is located in engagement with the sleeve head 84 so as to force the push rod 72 outwardly of the sleeve 82 against the outer surface of the cam 53. Thus it serves as a return mechanism for the diaphragm and piston assembly 56. In the illustrated arrangement, the outer periphery of the push rod 72 includes a peripheral groove 146 therein that directs lubricant from a sump chamber 148 within the housing 30 along the bearing surface of the bearing extension 82 upon opposite reciprocation of the push rod 72 therein.

During the movement of the piston and diaphragm assembly 56 to the right, as produced by the return spring 144, the volume of the pumping chamber 74 is increased by movement of the piston disc 98 away from the inner surface 76 of chamber 74. This causes a valve suction valve disc 150 to move away from suction ports 152 in the valve and cylinder head 58. In the illustrated arrangement, a rivet 154 secures the suction valve disc 150 in place on the inner surface of the pumping chamber 74. A suction cavity 156 is formed in the outer wall of the head 58 in communication with the suction openings 152. It is communicated through a tube 158 with the suction fitting 44.

The embodiment illustrated in FIGS. 3 and 4 shows a compressor assembly for use in a rear suspension leveling system like that shown in FIGS. 1 and 2. The compressor assembly 160 includes a housing shell 162 corresponding to the housing 66 in the first embodiment. It carries an annular O-ring 164 for sealing against a support fixture defined by an upstanding support flange or collar 166 on an inclined side surface 168 ofa differential housing 170. The housing is fixedly secured in place by means of a sleeve 172 and a clamp ring 174. The sleeve 172 includes a plurality of axial slots 176 located circumferentially therearound for gripping the outer surface of the housing 162 so as to hold it axially to locate the spherical end 178 of a push rod 180 corresponding to the push rod 72 in the first embodiment.

In this arrangement, the push rod 180 is biased inwardly by a return spring 182 against an inclined surface 184 having a plurality of lobes formed thereon of a differential case cam 186. The inclined surface 184 is formed generally parallel to the inclined side surface 168 of the differential housing.

Side surface 168 is located at one side of the differential housing which supportingly receives the inner end 188 of an axle housing 190 for an axle 191. The inner end is secured in place on the differential housing 168 by suitable fastening means such as bolts 192. The

inner end 188 of the axle housing 190 is counterbored at 194 to supportingly receivea shaft bearing assembly 196 which supports a bearing surface 198 on the differential case 199 for rotation with respect to the axle housing 190. The'cam 186 has an annular base portion 200 thereon seated on the surface 198, where it is fixedly secured by a tang 201 against rotationwith respect to the surface 198. The arrangement permits inclusion of a compressor operating cam within the differential housing 168. without requiring; modification of existing differential mechanisms within the housing 168. By virtue of the aforedescribed arrangement, the compressor 160 can be located with respect to a housing out of the way of operative components thereof and the location of the cam on the differential case permits an inclined surface thereon to be. located parallel to the normal differential housing configuration so as to position the end 178 of the push rod 180 in a perpendicular relationship to the drive cam surface thereby to reduce side thrust on the push rod.

In the embodiment of FIGS. 3 and 4, the pump has working components like those shown in FIG. 2. It includes an outer cover 202 which joins a valve head pump chamber to an open ended pump or compressor housing. In this arrangement a common header with calibrated pressure relief valve is included. The header is illustrated at 204 and includes a discharge end 206 and an inlet end 208 thereon. An offset leg 210 includes a relief valve bore 211 having a valve seat 212 with a ball 214 spring biased thereon by a spring 216 which is adjusted to produce a predetermined relief valve calibration on the ball 214 by means of a calibration screw 218 threadably received in bore 211. The valve seat 212 is formed between offset passageways 220, 222 which communicate the outlet port 206 with the inlet port 208 when the predetermined maximum pressure condition within the discharge side of the system moves, the ball from the relief valve seat 212 thereby causing the high pressure buildup to bypass directly back to the suction side of the compressor for relieving the system.

The detailed description of the preferred embodiment of the invention for the purpose of explaining the principles thereof is not to be considered as limiting or restricting the invention, since many-modifications may be made by the exercise of skill in the art.

What is claimed is as follows:

1. In a fluid compressor and drive assembly, rotatable drive means for driving said compressor, a housing for said rotatable drive means, said housing having an opening therethrough and having cylindrical wall means fixed to said housing extending from said opening, said compressor comprising a compressor casing having an enlarged annular head portion and having reduced diameter tubular extensionmounted for sliding telescopic movement with respect to said cylindrical wall means, fastener means for releasably securing said tubular extension to said wall means of said housing, piston means mounted for reciprocal movement in said head portion and cooperating therewith to provide an expandable and contractable chamber therein. fluid supply means operatively connected to said chamber for supplying fluid thereto in response to the expansion of said chamber, fluid exhaust means operatively connected to said chamber for exhausting fluid therefrom in response to the contraction of said chamber, piston drive means for stroking said piston means in said head portion to expand and contract said chamber, said piston drive means extending longitudinally through said tubular extension of said compressor casing and said opening in said housing into engagement with said rotatable drive means, support means mounted in said tubular extension, said support means having a cylindrical head portion fitted into said tubular extension of said compressor casing adjacent to said piston means, said support means further having bearing sleeve means radially inwardly of said head portion for slidably supporting said pistondrive means, elongated helical spring means operatively connected between said head portion and said piston drive means providing a force for moving said compressor casing linearly outwardly with respect to said housing so that said casing can be subsequently fixed at a predetermined station with respect to said housing by said fastener means and for maintaining said piston drive means in contact with said rotatable drive means.

2. In a fluid compressor and drive assembly, rotatable cam means for driving said compressor, a housing for i said rotatable cam means, said housing having an opening therethrough and cylindrical flange means extending outwardly from said housing to provide a passage connected to said opening, said compressor comprising a casing having an annular head portion with a cavity therein and having a reduced diameter-hollow tubular extension integral with said head portion leading outwardly from said cavity, means supporting said tubular extension for linear telescoping movement with respect to said cylindrical flange means, fastener means for releasably securing said tubular extension to said flange means of said housing, diaphragm means mounted for flexing movement in said cavity of said head portion and cooperating with said head portion to provide an expandable and contractable chamber therein, fluid supply means operatively connected to said chamber for supplying fluid thereto in response to the expansion of said chamber, fluid exhaust means operatively connected to said chamber for exhausting fluid therefrom in response to the expansion of said chamber, fluid exhaust means operatively connected to said chamber for exhausting fluid therefrom in response to the contraction' of said chamber, reciprocally movable drive means operatively connected to said diaphragm for flexing said diaphragm means in said head portion to expand and contract said chamber in response to rotationof said cam means, said drive means comprising rod means extending longitudinally through said tubular extension and said opening in said housing into engagement with said rotatable drive means, support means mounted in said tubular extension for supporting said rod means between the ends thereof, said support means comprising a head portion mounted in said tubular extension and integral bearing sleeve means for said rod means supported radially inwardly of said head portion, helical spring means disposed around said bearing sleeve means and operatively positioned between said head portion and one end of said rod means for moving said casing outwardly with respect to said housing so that said casing can be subsequently fixed at a predetermined station with respect to said housing by said fastener means and for maintaining said rod means in yieldable contact with said rotatable cam means so that said cam means can flex said diaphragm and pump fluid from said fluid chamber into said fluid exhaust means.

3. A fluid compressor and drive assembly comprising rotatable cam means, a housing for said rotatable cam means, said housing having an opening therethrough and cylindrical flange means extending outwardly from said housing to provide a passage connected to said opening, said compressor comprising a casing having a head portion with a cavity therein and a hollow tubular extension leading outwardly from said cavity, support means mounting said tubular extension for longitudinal telescoping movement on said cylindrical flange means, fastener means for securing said tubular exten sion in adjusted position to said flange means of said housing, diaphragm means mounted for flexing movement in said head portion and cooperating therewith to provide an expandable and contractable chamber therein, fluid supply means operatively connected to said chamber for supplying fluid thereto in response to the expansion of said chamber, fluid exhaust means operatively connected to said chamber for exhausting fluid therefrom in response to the contraction of said chamber, reciprocally movable drive means operatively connected to said diaphragm for flexing said diaphragm means in said head portion to expand and contract said chamber in response to rotation of said cam means, said drive means comprising cylindrical push rod means extending longitudinally through said tubular extension and said opening in said housing into engagement with said rotatable drive means, support means mounted in said tubular extension for supporting said rod means, said support means comprising a head portion mounted in said tubular extension and cylindrical bearing sleeve means supported radially inwardly of said head portion, said sleeve means extending axially beyond said head portion and having an axial opening extending therethrough, said push rod extending through said axial opening and having a major portion of its length supported by said sleeve means, helical spring means operatively disposed around said bearing sleeve means, means operatively mounting said spring means between one end of said head portion and one end of said rod means for moving said support means and said casing outwardly with respect to said housing so that said casing can be subsequently fixed at a predetermined station with respect to said housing by said fastener means and for maintaining said push rod means in yieldable contact with said rotatable cam means so that said cam means can axially move said push rod and flex said diaphragm and pump fluid from said fluid chamber into said fluid exhaust means.

4. In a fluid compressor and drive assembly, a rotatable input, rotatable cam means operatively connected to said input for driving said compressor, a housing for said rotatable cam means, said housing having a cylindrical extension fixed thereto 'with a passage therethrough leading into the interior of said housing, said compressor comprising a casing having a head portion and a tubular body portion, support means for mounting said tubular body portion for linear telescoping movement into and out of said cylindrical extension, fastener means for securing said tubular body in an adjusted position in said extension of said housing, piston means mounted for reciprocal movement in said head portion and cooperating therewith to provide an expandable and contractable chamber therein, fluid supply means operatively connected to said chamber for supplying fluid thereto in response to the expansion of said chamber, fluid exhaust means operatively connected to said chamber for exhausting fluid therefrom in response to the contraction of said chamber, push rod means for stroking said piston means in said head portion to expand and contract said chamber, said push rod means extending longitudinally through said extension into engagement with said rotatable cam means, support means mounting said push rod means for limited axial movement in said tubular body portion, said support means comprising a head portion fitted within said cylindrical extension and a concentric bearing sleeve for said push rod means, helical spring means in said body portion and operatively mounted between said head portion and said push rod means for moving ment of said cam means.

Claims (4)

1. In a fluid compressor and drive assembly, rotatable drive means for driving said compressor, a housing for said rotatable drive means, said housing having an opening therethrough and having cylindrical wall means fixed to said housing extending from said opening, said compressor comprising a compressor casing having an enlarged annular head portion and having reduced diameter tubular extension mounted for sliding telescopic movement with respect to said cylindrical wall means, fastener means for releasably securing said tubular extension to said wall means of said housing, piston means mounted for reciprocal movement in said head portion and cooperating therewith to provide an expandable and contractable chamber therein, fluid supply means operatively connected to said chamber for supplying fluid thereto in response to the expansion of said chamber, fluid exhaust means operatively connected to said chamber for exhausting fluid therefrom in response to the contraction of said chamber, piston drive means for stroking said piston means in said head portion to expand and contract said chamber, said piston drive means extending longitudinally through said tubular extension of said compressor casing and said opening in said housing into engagement with said rotatable drive means, support means mounted in said tubular extension, said support means having a cylindrical head portion fitted into said tubular extension of said compressor casing adjacent to said piston means, said support means further having bearing sleeve means radially inwardly of said head portion for slidably supporting said piston drive means, elongated helical spring means operatively connected between said head portion and said piston drive means providing a force for moving said compressor casing linearly outwardly with respect to said housing so that said casing can be subsequently fixed at a predetermined station with respect to said housing by said fastener means and for maintaining said piston drive means in contact with said rotatable drive means.
2. In a fluid compressor and drive assembly, rotatable cam means for driving said compressor, a housing for said rotatable cam means, said housing having an opening therethrough and cylindrical flange means extending outwardly from said housing to provide a passage connected to said opening, said compressor comprising a casing having an annular head portion with a cavity therein and having a reduced diameter hollow tubular extension integral with said head portion leading outwardly from said cavity, means supporting said tubular extension for linear telescoping movement with respect to said cylindrical flange means, fastener means for releasably securing said tubular extension to said flange means of said housing, diaphragm means mounted for flexing movement in said cavity of said head portion and cooperating with said head portion to provide an expandable and contractable chamber therein, fluid supply means operatively connected to said chamber for supplying fluid thereto in response to the expansion of said chamber, fluid exhaust means operatively connected to said chamber for exhausting fluid therefrom in response to the expansion of Said chamber, fluid exhaust means operatively connected to said chamber for exhausting fluid therefrom in response to the contraction of said chamber, reciprocally movable drive means operatively connected to said diaphragm for flexing said diaphragm means in said head portion to expand and contract said chamber in response to rotation of said cam means, said drive means comprising rod means extending longitudinally through said tubular extension and said opening in said housing into engagement with said rotatable drive means, support means mounted in said tubular extension for supporting said rod means between the ends thereof, said support means comprising a head portion mounted in said tubular extension and integral bearing sleeve means for said rod means supported radially inwardly of said head portion, helical spring means disposed around said bearing sleeve means and operatively positioned between said head portion and one end of said rod means for moving said casing outwardly with respect to said housing so that said casing can be subsequently fixed at a predetermined station with respect to said housing by said fastener means and for maintaining said rod means in yieldable contact with said rotatable cam means so that said cam means can flex said diaphragm and pump fluid from said fluid chamber into said fluid exhaust means.
3. A fluid compressor and drive assembly comprising rotatable cam means, a housing for said rotatable cam means, said housing having an opening therethrough and cylindrical flange means extending outwardly from said housing to provide a passage connected to said opening, said compressor comprising a casing having a head portion with a cavity therein and a hollow tubular extension leading outwardly from said cavity, support means mounting said tubular extension for longitudinal telescoping movement on said cylindrical flange means, fastener means for securing said tubular extension in adjusted position to said flange means of said housing, diaphragm means mounted for flexing movement in said head portion and cooperating therewith to provide an expandable and contractable chamber therein, fluid supply means operatively connected to said chamber for supplying fluid thereto in response to the expansion of said chamber, fluid exhaust means operatively connected to said chamber for exhausting fluid therefrom in response to the contraction of said chamber, reciprocally movable drive means operatively connected to said diaphragm for flexing said diaphragm means in said head portion to expand and contract said chamber in response to rotation of said cam means, said drive means comprising cylindrical push rod means extending longitudinally through said tubular extension and said opening in said housing into engagement with said rotatable drive means, support means mounted in said tubular extension for supporting said rod means, said support means comprising a head portion mounted in said tubular extension and cylindrical bearing sleeve means supported radially inwardly of said head portion, said sleeve means extending axially beyond said head portion and having an axial opening extending therethrough, said push rod extending through said axial opening and having a major portion of its length supported by said sleeve means, helical spring means operatively disposed around said bearing sleeve means, means operatively mounting said spring means between one end of said head portion and one end of said rod means for moving said support means and said casing outwardly with respect to said housing so that said casing can be subsequently fixed at a predetermined station with respect to said housing by said fastener means and for maintaining said push rod means in yieldable contact with said rotatable cam means so that said cam means can axially move said push rod and flex said diaphragm and pump fluid from said fluid chamber into said fluid exhaust means.
4. In a fluid compressor and drive assembly, a rotatable input, rotatable cam means operatively connected to saId input for driving said compressor, a housing for said rotatable cam means, said housing having a cylindrical extension fixed thereto with a passage therethrough leading into the interior of said housing, said compressor comprising a casing having a head portion and a tubular body portion, support means for mounting said tubular body portion for linear telescoping movement into and out of said cylindrical extension, fastener means for securing said tubular body in an adjusted position in said extension of said housing, piston means mounted for reciprocal movement in said head portion and cooperating therewith to provide an expandable and contractable chamber therein, fluid supply means operatively connected to said chamber for supplying fluid thereto in response to the expansion of said chamber, fluid exhaust means operatively connected to said chamber for exhausting fluid therefrom in response to the contraction of said chamber, push rod means for stroking said piston means in said head portion to expand and contract said chamber, said push rod means extending longitudinally through said extension into engagement with said rotatable cam means, support means mounting said push rod means for limited axial movement in said tubular body portion, said support means comprising a head portion fitted within said cylindrical extension and a concentric bearing sleeve for said push rod means, helical spring means in said body portion and operatively mounted between said head portion and said push rod means for moving said casing outwardly with respect to said cylindrical extension so that said casing can be subsequently fixed at a predetermined station with respect to said housing by said fastener means and for maintaining said push rod means in contact with said rotatable cam means so that said cam means can stroke said piston means outwardly to contract said chamber on predetermined rotational movement of said cam means and so that said spring means can stroke said piston means inwardly in response to further predetermined rotational movement of said cam means.
US30733172 1972-11-16 1972-11-16 Differential mounted single stage diaphragm operated pump Expired - Lifetime US3841796A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192223A (en) * 1977-02-10 1980-03-11 Dosapro Milton Roy Adjustment device, notably for metering reciprocating pumps
US4621566A (en) * 1985-09-11 1986-11-11 Liquid Level Lectronics, Inc. Electric pump
US4782738A (en) * 1985-09-18 1988-11-08 Gast Manufacturing Corporation Compressor with adjustable head clearance
US6126410A (en) * 1998-02-12 2000-10-03 Gast Manufacturing Corporation Head cover assembly for reciprocating compressor
US6171081B1 (en) * 1998-02-17 2001-01-09 Keihin Corporation Fuel pump assembly
US6431845B1 (en) 2000-06-09 2002-08-13 Gast Manufacturing, Inc. Head cover assembly with monolithic valve plate
USD499119S1 (en) 2003-11-05 2004-11-30 Gast Manufacturing Corporation Compressor

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US1896098A (en) * 1930-07-18 1933-02-07 Guy R Poyer Adjustable compression chamber
US2099852A (en) * 1936-01-23 1937-11-23 Viking Diesel Motor Corp Internal combustion engine
US2956738A (en) * 1957-12-10 1960-10-18 Atlas Copco Ab Reciprocating cross-head compressors
US3035676A (en) * 1957-02-28 1962-05-22 Daimler Benz Ag Clutch actuating mechanism
US3095824A (en) * 1960-06-13 1963-07-02 Gen Motors Corp Fuel pump drive
US3151568A (en) * 1961-07-26 1964-10-06 Gen Motors Corp Diaphragm pump of minimum displacement loss
US3168855A (en) * 1957-09-19 1965-02-09 Glenn T Randol Detachable mounting means for flexible power-diaphragms
US3199458A (en) * 1963-06-10 1965-08-10 Karl W Hoehn Fuel control valve
US3252424A (en) * 1960-01-15 1966-05-24 Acf Ind Inc Fuel systems
US3375972A (en) * 1966-08-11 1968-04-02 Zefex Inc Pump for a gaseous medium
US3650182A (en) * 1969-09-17 1972-03-21 Cessna Aircraft Co Closure for fluid pressure vessel

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Publication number Priority date Publication date Assignee Title
US862867A (en) * 1906-03-28 1907-08-06 Lewis Watson Eggleston Pneumatic pumping apparatus.
US1896098A (en) * 1930-07-18 1933-02-07 Guy R Poyer Adjustable compression chamber
US2099852A (en) * 1936-01-23 1937-11-23 Viking Diesel Motor Corp Internal combustion engine
US3035676A (en) * 1957-02-28 1962-05-22 Daimler Benz Ag Clutch actuating mechanism
US3168855A (en) * 1957-09-19 1965-02-09 Glenn T Randol Detachable mounting means for flexible power-diaphragms
US2956738A (en) * 1957-12-10 1960-10-18 Atlas Copco Ab Reciprocating cross-head compressors
US3252424A (en) * 1960-01-15 1966-05-24 Acf Ind Inc Fuel systems
US3095824A (en) * 1960-06-13 1963-07-02 Gen Motors Corp Fuel pump drive
US3151568A (en) * 1961-07-26 1964-10-06 Gen Motors Corp Diaphragm pump of minimum displacement loss
US3199458A (en) * 1963-06-10 1965-08-10 Karl W Hoehn Fuel control valve
US3375972A (en) * 1966-08-11 1968-04-02 Zefex Inc Pump for a gaseous medium
US3650182A (en) * 1969-09-17 1972-03-21 Cessna Aircraft Co Closure for fluid pressure vessel

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192223A (en) * 1977-02-10 1980-03-11 Dosapro Milton Roy Adjustment device, notably for metering reciprocating pumps
US4621566A (en) * 1985-09-11 1986-11-11 Liquid Level Lectronics, Inc. Electric pump
US4782738A (en) * 1985-09-18 1988-11-08 Gast Manufacturing Corporation Compressor with adjustable head clearance
US6126410A (en) * 1998-02-12 2000-10-03 Gast Manufacturing Corporation Head cover assembly for reciprocating compressor
US6171081B1 (en) * 1998-02-17 2001-01-09 Keihin Corporation Fuel pump assembly
US6431845B1 (en) 2000-06-09 2002-08-13 Gast Manufacturing, Inc. Head cover assembly with monolithic valve plate
USD499119S1 (en) 2003-11-05 2004-11-30 Gast Manufacturing Corporation Compressor

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