Abstract: A piston type compressor provided with a suction valve mechanism which includes a suction valve element having suction reed valves openably closing suction ports for providing a fluid communication between a suction chamber for refrigerant gas before compression and cylinder bores in which pistons reciprocate to compress the refrigerant gas. The cylinder bores are provided with a first axially recessed engaging face engaging with frontmost end portions of the suction reed valves to provide the suction reed valve with a preliminary step of stopping condition, and a second axially recessed engaging face portions engaged with an inner portion of the suction reed valves to provide the suction reed valve with a final step of stopping condition.

Abstract: A compressor whose structure is simple, assembling is easy and refrigeration efficiency is improved.A valve unit of the compressor includes a valve plate 230 in which a suction hole 231 and a discharge hole 234 are formed, a suction valve plate 220 disposed between valve plate 230 and a cylinder block 17, formed with a first opening and closing piece 221 for opening and closing the suction hole, and a discharge plate 240 disposed between valve plate 230 and cylinder head 25, formed with a second opening and closing piece for opening and closing the discharge hole.

Abstract: A compressor including an isolated backstop which reduces the amount of undesirable noise emitted from a compressor during operation. The backstop includes two or more isolating members which isolate the backstop and prevent direct contact between the backstop and the walls of compressor. The isolating members may be elastomeric members or springs.

Abstract: An elongated recess is provided on one side of a valve plate, and a piston is provided on the other side of the valve plate. Discharge holes are provided through the valve plate at the recess, and a pair of discharge reeds are disposed within the recess to close/open the discharge holes. A spring reed presses against the discharge reeds on sides thereof opposite to the discharge holes to close the discharge holes. A stopper is secured to the valve plate and fixes the spring reed into position. The operation of the discharge reed can be tested by the operation of the discharge reed alone, and refrigerant gas remaining in the discharge holes can be reduced, thereby improving compression efficiency. The two discharge holes are each associated with one of the pair of discharge reeds, thereby preventing over-compression loss.

Abstract: A pump has an extruded metal housing surrounding a square internal chamber accommodating a piston assembly with square pistons. An eccentric member and block assembly associated with a driven shaft reciprocates the piston assembly to pump fluid. The flow of fluid into and out of the pumping chamber is controlled with intake and exhaust valves incorporated into plates mounted on opposite ends of the housing.

Abstract: A micro pump which employs magnetostrictive or electrostrictive elements as solid drive elements and is capable of self-priming even though its flow rate is increased. In the pump, disk-shaped valve elements respectively having tapered protrusions on one side are used as check valves to reduce weight and made to follow the motion of liquids so as to smoothly open and close. Retainers for regulating the gap h between the valve seats and the valve elements are respectively provided with tapered recesses for guiding the protrusions of the valve elements, whereby the valves are prevented from contacting the retainers, thus undergoing less friction therewith, to ensure smooth opening and closure of the valves. Moreover, ringlike or sheetlike elastic materials are provided on the bottoms of the recesses to improve responsivity in the direction in which the valves are closed.

Abstract: A combined housing and air pump has a barrel type outside vessel one end of which is closed and the other end of which is open, a barrel type inside vessel one end of which is closed and the other end of which is open, and an air suction opening and an air discharge opening formed on the closed end of one of the outside vessel and the inside vessel, the inside vessel can be inserted from the opening of the outside vessel, and inside the outside vessel the outer periphery of the inside vessel is substantially very close to the inner periphery of the outside vessel and the inside vessel can rub in the axial direction of these vessels. The air suction opening has a check valve through which an air is allowed to pass only in the air suction direction, and the air discharge opening has removable nozzle separately formed. The container can be carried with things contained in the inside space sectioned by the two vessels.

Abstract: A hydraulic pump provides unidirectional fluid flow regardless of the direction of rotation of the rotary shaft of the pump. The rotary shaft is affixed to a rotating arm, which arm includes a spherical bearing in the outer end thereof which secures to the pin of a plunger. The rotary shaft is inclined at an angle to the axis of the plunger, resulting in a reciprocating action of the plunger when the rotary shaft is turned. The pump may be motorized by a variety of different power sources, and preferably includes a speed reduction for such motors in order to allow smaller motors and valve assemblies. The valves are preferably included in an easily removable and replaceable integrated cartridge, thus enabling the pump to be quickly adapted to various types of hydraulic devices, such as jacks, hoists, presses, etc. The valving within the cartridge also includes various features providing for compactness and efficiency.

Abstract: A refrigerant compressor includes a compressor housing divided at least partially by a valve plate into a first chamber comprising a compression chamber, and a second chamber comprising a discharge chamber. A fluid conduit links the compression chamber with the discharge chamber. An elastic valve member opens and closes the end of the conduit. The valve member has a predetermined spring constant such that the end opening of the conduit remains blocked until the pressure in the compression chamber reaches a predetermined value. An integral gasket is positioned between the valve plate and the front and rear housings and comprises an outermost, an intermediate and an innermost annular portion chamber. Outer ribs are connected between the outermost and the intermediate annular portion, and inner ribs are connected between the intermediate and the innermost annular portions.

Abstract: Intake or exhaust reed valves of a compressor or vacuum pump have T-shaped flappers which are received in similarly T-shaped pockets so as to be substantially flush with the valve plate. A dirt trap groove is formed in each pocket adjacent to the hinge line of the flapper, a corner relief groove surrounds lands which support the flappers in their associated pockets above the groove, and the extending-part of each pocket widens in the direction away from the cross-part of the pocket. The mating T-shapes of a flapper in a pocket restrain the flapper in the pocket without interfering with the opening and closing motion of the flapper.

Abstract: A valve assembly for a compressor or the like having improved sealing and noise reduction characteristics. A reed valve is provided with a gasketing layer, such as expanded graphite, which confronts the orifice plate. One reed valve plate also incorporates an integral, formed limiter portion to reduce the number of parts requiring assembly.

Abstract: In a plunger pump having a pump chamber delimited by a cylinder and a plunger reciprocating in the cylinder, and a first seal member provided between an inner surface of the cylinder and an outer surface of a plunger to prevent a liquid in the pump chamber from leaking to the outside, the inner surface of the cylinder and the outer surface of the plunger are out of sliding contact with each other, and a second seal member is interposed between the first seal member and the pump chamber. During a suction stroke, the second seal member is in sliding contact with the outer surface of the plunger to prevent dust, which is produced as the result of wear, from flowing to the pump chamber from the first seal member side. During a discharge stroke, a minute gap is formed between the second seal member and the outer surface of the plunger.

Abstract: A positive displacement pump wherein the housing has a thin one-piece plate-like head bolted to the adjacent end of a casing for one or more reciprocable plungers. Each plunger is coaxial (a) with a suction intake valve installed in a larger-diameter portion of a two-part insert in the casing adjacent the head, and (b) with an outlet valve installed in a recess of the head adjacent a second portion of the insert. The second portion of the insert is surrounded by an annular space which communicates with a main suction chamber of the pump to return into the suction chamber any fluid leaking between the two portions of the insert. The second portion has a first seat disposed at one end of an axial channel and forming part of the intake valve, and a second seat disposed at the other axial end of the channel and forming part of the outlet valve.

Abstract: A valve plate assembly is provided with a valve restraint for maintaining a valve within a recessed portion of the valve plate. The valve restraint further includes an irregular surface which contacts the surface of the valve when the assembly is in use, for example, in a compressor. The irregular surface may include through-holes at least partially through the surface which contacts the valve or may be a textured surface which contacts the valve during use. The valve plate includes a recessed portion having guides for receiving notched sections in the sidewalls of the valve and valve restraint.

Abstract: A high pressure pump includes a housing having a pump chamber therein for receiving a pump piston, and a separate pressure housing having a liquid pressure chamber therein in fluid communication with a pump discharge flow line within an outlet housing. A force-transmitting piston is provided within the pressure housing and is movable along an axis substantially coincident with the central axis of the pump piston to place a desired load on each of a plurality of compression rods. The pump may be initially manufactured with the pressure housing, or a separate pressure housing may be added to an existing pump without modifying other pump components. According to the method of this invention, a control valve in a compression line is opened, the pump is activated, then the compression line is closed to maintain the compression rods under load.

Abstract: A diaphragm pump has a first fluid-operated valve which opens when the diaphragm performs a suction stroke and a second fluid-operated valve which opens when the diaphragm performs a compression stroke. The volumetric efficiency of the pump is enhanced by constructing at least one of its valves in such a way that the central portion of a resilient disc-shaped valving element, whose marginal portion bears against a seat when the valve is closed, abuts a supporting surface having a diameter selected in dependency on the diameter of the valving element, the thickness of the valving element and the Shore hardness of the material of the valving element in such a way that the selected frequency of the diaphragm in actual use of the pump induces a resonant frequency of the valving element. This also contributes to a reduction of noise and renders it possible to reduce wear upon the valving element and the adjacent parts of the respective valve.

Abstract: An integral gas compressor and internal combustion engine. The compressor is built by converting a portion of an internal combustion engine to a compressor by removing the original engine head and valve train and replacing these with a compressor head assembly. The compressor head assembly includes compressor valves and valve chairs for holding the compressor valves in place. An inlet manifold encloses all of the valve chairs and places all of the inlet flow paths through the valve chairs in communication with a gas source. The head defines a discharge passageway therethrough which is in communication with a discharge opening. A venting system is provided to vent any gas that might build up in the compressor due to leakage past the piston rings and to transfer this vented gas to a fuel inlet of the engine, as desired. An oil viscosity sensing system is provided for sensing the oil viscosity in the crankcase and shutting down the engine when the viscosity drops below a prdetermined level.

Abstract: A reciprocating piston hermetic compressor is disclosed, including a crankcase defining a cylinder, and a cylinder head and valve plate assembly attached to the top surface of the crankcase to cover the cylinder. A cantilevered suction leaf valve has an attached end intermediate the crankcase top surface and the valve plate. During a compression stroke of the compressor, the unattached end of the suction valve is forced by pressure against the valve plate to cover a suction inlet opening. During an intake stroke of the compressor, the unattached end is drawn away from the valve plate to open the suction inlet opening. The unattached end of the suction valve is limited in its travel into the cylinder by engagement with a positive stop defined by a generally inclined milled surface intersecting the crankcase top surface and the cylinder wall.

Abstract: A valve spacer plate assembly includes a rigid plate member having first and second outer surfaces and at least one opening extending therethrough. The assembly also includes at least one gasket member disposed on one of the outer surfaces of the rigid plate member. The gasket member circumscribes at least one of the openings. A spaced portion circumscribes the edge of the openings, and forms a seating ledge against which the free end of a blade valve may rest.

Abstract: A fluid end for use in high-pressure, reciprocating, fluid pumps has a cylinder with a bore therethrough in which a plunger reciprocates. A valve body is disposed at one end of the bore and includes suction valve seat and a discharge valve seat, which are substantially coaxial with the axis of the bore in the cylinder. The suction and discharge valves include elastomeric, abrasion-resistant seal members. The valve body is provided with at least one fluid flow passage positioned about the periphery of the suction valve seat to permit purging of entrapped gas from the pressure chamber defined in the cylinder bore between the plunger and the valve body. In a preferred embodiment of the present invention the suction and discharge valves are identical and interchangeable, and the valves are provided with urethane seal members to increase the abrasion resistance of the valves.

Abstract: A low blow-by compressor has a piston with at least one first ring disposed at the top end thereof and at least one second ring disposed at the bottom end thereof. A port is formed in the cylinder such that the port is above the second rings when the piston is positioned at top dead center and the port is below the first rings when the piston is positioned at bottom dead center such that fluid which blows by the first rings tends to exit the cylinder through the port rather than to blow-by the second rings. Thus any fluid which blows by the first rings can either be exhausted or recycled through the compressor inlet. The compressor utilizes reed valves wherein a first valve plate is attached to the cylinder and a second valve plate is disposed in laminar juxtaposition to the first valve plate. A reed valve gasket assembly is disposed intermediate the first and second plates and an o-ring is disposed about the periphery of the valve reed gasket assembly to prevent fluid leakage therethrough.

Abstract: A check valve having a valve housing with an outlet fluid passage and a housing valve cavity in communication with each other. A valve body has an inlet fluid passage and a body cavity in communication with each other. The valve body is sealably secured to the valve housing. A valve poppet is slidably mounted within the body cavity. The valve poppet has a central cavity. A side wall of the valve poppet has a poppet through hole which is in communication with the central cavity. The valve poppet has a poppet shoulder portion and an extension portion. A seal disk has a seal disk through hole into which the extension portion of the valve poppet is positioned. The seal disk is positioned within the housing valve cavity. A closure spring is used to normally urge the valve poppet into a closed position in which the valve poppet preferably abuts a sealing surface of the valve body.

Abstract: Where on the valve seating surfaces due to the high pressure pumping of abrasive slurry through an in-line valve is greatly reduced by providing first and second valve seating surfaces which are engaged, respectively by first metal and first elastomeric closure surfaces and second metal and elastomeric closure surfaces located on an annular valve closure means. Pumping efficiency is maintained by providing for high velocity sweep in an annular space between the annular valve closure means and the cylinder in which it rides.

Abstract: A valve assembly in a piston type refrigerant compressor is disclosed. The valve assembly includes a retainer formed integrally with a gasket plate for restricting the opening of a discharge reed valve of the compressor, and having on opposite sides at the distal portion thereof stay portions integral with the gasket plate for rigidly holding the retainer. According to the present invention, provision is made to guide some part of the refrigerant gas compressed in a cylinder bore to be discharged into a discharge chamber in such a way that the influence of the discharge gas pressure on the retainer at its distal end is reduced. In some embodiments of the invention, this is accomplished by guiding and allowing part of the gas to flow toward the proximal portion of the retainer to discharge the gas.

Abstract: A valve seat plate (1) having at least three individual plates (2, 3, 4) which lie upon one another and exhibits, on the one hand, continuous channels (5) for the medium to be controlled and defines, on the other hand, cavities (16) between the channels for the coolant, includes sleeves (8) that define the channels and are sealed with respect to the cavities and extend through the thickness of the valve seat plate.

Abstract: A valve plate assembly includes a flapper valve and restraint in recessed intake and outlet ports of a valve plate. The recessed ports have guides located therein corresponding to notched sections of the flapper valve and the restraint such that a foolproof method of assembly can be achieved. In addition, a screw clearance in the top of the piston is not required since the recessed portion allows for the screw to be at or below the surface of the valve plate.

Abstract: In a high volumetric efficiency compression machine that can be used as a compressor, pump, or actuator, a compression chamber is formed by a movable body and the inner wall of a casing. A discharge valve is formed in the casing, and communicates with the compression chamber. Two intake valves are formed in the casing, communicate with the compression chamber and are arranged symmetrically with respect to the axial direction of the discharge valve. A rod transmits reciprocation to the movable body.

Abstract: A reciprocating piston hermetic compressor including a two piece suction valve used for fluid control. The reexpansion volume between the valve leaf and valve spacer is reduced to a minimum. The valve leaf is located within the compressor and valve spacer by an attachment means such as locating pins.

Abstract: A pump for liquefied gases is provided having a low thermal conductivity liner provided in the inner bore of the pump cylinder. The low thermal conductivity liner prevents transmission to the pump cylinder of heat generated during the compression of the liquefied gas. The liner is preferably formed from a ceramic, such as zirconium, or from a plastic. In addition to the provision of the low thermal conductivity liner, techniques for reducing the dead volume of retained gases in the pump chamber are utilized to prevent the transmission of retained heat from the these gases to the incoming charge of liquefied gases.

Abstract: A reed valve for a hermetic compressor, comprising a cylinder block (1) having a pair of opposite faces; a cylinder (C) formed in said cylinder block (1) and housing a piston (2); at least one end plate (3) having an outer face (3a) and an inner face (3b) fixed to one of the opposite faces of the cylinder block (1), in order to close a respective end of the cylinder (C), and being provided with at least one pair of axial gas passages (6, 7) communicating the interior of the cylinder (C) with the outer face (3a) of the end plate (3) through a respective read valve (10), which is fixed to the face (3a) of the end plate (3), to which is opened the outlet end (6b, 7b) of the respective gas passage (6, 7), said valve comprising a blade element (10) with a body being formed of a resin that is preferably plastic and reinforced with fiber filaments (20, 21, 22) spaced from each other according to at least one direction relative to the longitudinal axis of the blade element (10).

Abstract: An air compressor comprises a cylinder, a suction valve body operatively combined with the cylinder, wherein the suction valve body is in a form of a band plate having a shape of V-letter with a round bottom, both ends of the suction valve body being arranged outside a projection space of the cylinder and a portion of the suction valve body other than the both ends being arranged inside the projection space of the cylinder, and wherein the air compressor comprises a suction valve plate receptor which can overlap the suction valve body when the suction valve body is in suction stroke and which has a rigidity enough to restrict an amount of lift of the suction valve body.

Abstract: A novel pressurized fluid delivery system which has a single fluid inlet block for each plunger of a pump assembly and with an individual fluid inlet manifold and an individual fluid discharge manifold coupled by a valve body assembly to the fluid cylinder block. The three individual units, the fluid inlet manifold, the fluid outlet or discharge manifold, and the fluid cylinder block, are small in size and weight when compared to the single large fluid cylinder block of the prior art and thus are much less expensive to manufacture and are easier to handle. The novel valve assembly is less expensive to manufacture, has a lower restriction to fluid flow than prior art comparable valves and requires less suction feed pressure than the prior art valves.

Abstract: Valve for a hermetic refrigeration compressor, having a cylinder block (10) with a cylinder (C) and a piston (20). A valve plate (30) attached to the cylinder block (10) has at least one axial gas passage (31, 32) communicating the inside of the cylinder (C) with the front face (30a) of the valve plate (30) through a respective reed valve at the outlet end (31b, 32b) of the respective gas passage (31, 32). The valve has a blade element (60, 80) and a biasing means (70, 90) disposed between the blade element (60, 80) and the valve plate (30) to displace said blade element to a partial opening position of the valve upon occurrence of pressure balance between the upstream and downstream regions of the valve, the biasing means (70, 90) itself being elastically deformed by the blade element (60, 80) when the valve closes, whenever the gas pressure downstream the valve exceeds the gas pressure upstream thereof.

Abstract: A compressor includes a passage in the sidewall of the cylinder for directing compressed gas against circumferential surfaces of piston rings. The pressure of the gas from the passage counteracts the pressure of gas between the piston ring groove and the piston ring, and urges the piston rings inwardly. The force with which the piston ring is urged into engagement with the cylinder walls is lessened, thereby reducing wear of the piston rings. The arrangement is especially useful for compressors having piston rings formed of low friction polymeric materials, such as fluorine-containing polymers.

Abstract: An elongated tubular member has an upper closed end and a lower closed end with a first opening. It also has a second opening on its wall and a suction unit movable within the same. A first tubular member has a top open end and a constricted bottom end. The first tubular member has a first inflow and outflow check valve circumferentially spaced from the first inflow check valve. A partition provided adjacent to he constricted bottom end of the first tubular member has a third opening and second inflow and outflow check valves. The elongated tubular member resides rotatably and engageably in the first tubular member.

Abstract: A valve system for a fluid pumping assembly including a valve plate having at least one intake port extending therethrough and at least one discharge port also extending therethrough. The discharge port includes a central axis extending through the discharge port and orthoginal to the valve plate. The intake port is a slot having a width less than its length and subscribing an arc radially spaced from the central axis of the discharge port. A suction reed valve has a valve member that is defined at its distal edge by an arcuate slot in the valve wherein the slot is disposed arcuately and radially spaced from a discharge aperture in the valve member and terminates at either end in inwardly extending lobe portions that define a neck portion in the valve member having an axis about which the valve member moves between open and closed positions.

Abstract: A maximum-pressure plunger plump has, coaxial with its longitudinal axis, a compression valve and a suction valve. It has a sleeve that floats on a plunger. The sleeve rests on the end facing the head of the pump on an inset. the inset is provided with a seat area for the body of the suction valve and with suction channels. The sleeve has a bushing. The suction valve is in a form of a disk. It has a spring-loaded annular body that rests on the valve-seat area that the suction channels open out of in the insert in the pump head.The plunger's bushing (9) extends to th eend of the sleeve (7) that faces the head (2) of the pump with its face against the insert (12) and in that a sealing sleeve (15) that overlaps the area or seam of impact between the insert and the sleeve is accommodated in the flow channel between the bushing and the insert.

Abstract: The valve unit includes a valve plate fitted to a head end of the cylinder of the compressor and having a valve-controlled intake part and an exhaust port surrounded by an annular seat formed in an opposite face of the plate from that which faces the cylinder, an exhaust valve reed associated with the seat, and a limit device fixed to the plate for limiting the travel of the exhaust reed. The exhaust reed includes a base portion which is restrained on the plate, an obturating head portion spaced from the base portion and cooperating with the seat, and an elongate portion connected the base and head portions. The connecting portion is "L"-shaped in plan with the head portion situated at the end of the leg of the "L" and the base portion situated at the end of the foot of the "L". The foot of the "L" is free to bend with the leg of the "L".

Abstract: A pump head having a manifold with a fluid inlet and outlet, suction and discharge valves mounted in a channels valve seat cartridge for controlling fluid flow, and a plunger mounted in a fluid cylinder adjacent the valve seat cartridge for pumping fluid through the pump head, and, in one embodiment, high strength valve springs. A spring for valves in a pump head and methods for treating them.

Abstract: An air conditioning compressor comprises a compressor housing including front and rear housing heads and a pair of cylinder blocks disposed in the housing each defining axially disposed cylinders. The compressor also includes a double-acting piston in each cylinder opening, a swashplate and drive shaft assembly having a swashplate driveably engageable with each piston and a driveshaft mounted in each cylinder block coaxially therewith. The compressor further includes a valve assembly located between each housing head and each respective cylinder block. Each valve assembly includes an intake valve means disposed adjacent to the respective cylinder block, the intake valve means includes valve reeds that control flow from the low pressure passages to the cylinders, a valve plate disposed adjacent to the intake valve means, a discharge valve means disposed adjacent the valve plate, and a noise reducing gasket means disposed between the discharge valve means and the housing head.

Abstract: Device for the compression and storage of air comprising, on the one hand, a reservoir (1) provided with an air discharge head (5) intended for cooperation with a container to be charged with compressed air and, on the other hand, at least one compression chamber (C1), associated with air inlet valves (19) and air ejection valves (15) and with a compression element actuated by a motor means (13) compressing the volume of the chamber (C1) between a maximum volume and a minimum volume, the ratio between the maximum volume and the minimum volume of the said chamber (C1) being from 1.2 to 20.

Abstract: The piston type metering pump includes a synchronous electric motor, for example of the permanent-magnet type, which transmits its rotary motion to a speed reducer which is in turn associated, by means of a connecting rod-crank kinematic system, to a piston which is slidable in a hollow body in which it defines a variable-volume chamber. The chamber has, at its top, openings on which fluid intake and discharge valve means act.

Abstract: A valve plate accommodated in a reciprocatory piston type compressor and arranged between an axial end of a cylinder block provided with a plurality of cylinder bores in which a plurality of double-headed pistons are reciprocated to compress a refrigerant gas, and a housing member provided with a suction chamber and a discharge chamber. The valve plate is provided with a plurality of suction ports communicating between the suction chamber and the plurality of cylinder bores and openably closed by suction valves, and a plurality of discharge ports communicating between the discharge chamber and the plurality of cylinder bores of the cylinder block. The valve plate is provided with surface portions extended around each of the discharge ports to be cooperable with the spring steel discharge valves for opening and closing the discharge ports, and formed to have 10 through 20 Rz surface roughness and a Vicker's hardness of 120 through 450.

Abstract: A piston compressor having cylinder blocks, each defining cylinder bores in which a piston is axially reciprocally arranged. Front and rear housings are connected to the cylinder blocks via valve port plates, so that compression chambers are formed between the valve port plates and the cylinder blocks and inlet and outlet chambers are formed between the valve port plates. The valve port plates form inlet and outlet ports for each of the compression chambers and inlet valves and outlet valves formed as thin resilient web members are provided for the inlet and outlet ports, respectively, to control the feeding and discharge of the gas, respectively. The valve port plates having, on the surfaces thereof facing the outlet valve around the inlet ports, a roughened area having a surface roughness value R.sub.z of between 10 to 25 .mu.m and an average spacing value L of between to 50 to 100 .mu.m.

Abstract: A refrigeration compressor is disclosed which incorporates an improved valve plate assembly having selected portions thereof bowed outwardly to form discrete raised surface portions thereon. These raised surface portions serve to initially increase the clamping force on the gasket means disposed between the valve plate and head or compressor housing to thereby insure a fluid tight seal is maintained during operation of the compressor. Further the valve plate assembly incorporates dual suction valves oriented in side by side relationship and secured to the valve plate at opposite ends. This arrangement offers improved gas flow to the compression chamber by substantially reducing competition between adjacent valves.

Abstract: The present invention is a fuel primer pump capable of manually injecting fuel into the carburetor of an internal combustion engine, and is adapted to include both enrichment and shut-off positions. The primer pump includes a housing sealed at one end by an end cap which defines inlet and outlet openings. An internal piston is disposed within the housing for manual pumping of fuel. A relatively free floating valve pin, mounted on the internal piston, prevents an unwanted flow of fuel through the primer pump when the pump is disposed in the shut-off position. The valve pin is slidably retained within a cavity in the piston which opens onto the face of the piston proximate the end cap defining the outlet passageway. The valve pin is spring biased toward the outlet passageway and centers itself in the passageway seat due to the free floating nature thereof. The valve pin becomes disengaged from the seat when the primer pump is placed in the enrichment position, allowing the flow of fuel through the primer pump.

Abstract: An improved high pressure, piston pump has at least one two-piece telescoping cylinder having an end flange at one end and a housing containing piston drive means at the other end which are held together by tie rods passing through spacer tubes. The cylinder can be opened without loosening the tie rods to expose the piston and replace the piston seal.

Abstract: A valve assembly is interposed between the cylinder body and the cylinder cover of a piston compressor in which a piston assembly is provided slidably in the cylinder body. The valve assembly has an inlet passage with an increased-diameter inlet chamber, and an outlet passage with an increased-diameter outlet chamber. When the piston assembly moves away from the valve assembly in a suction stroke, an inlet valve rests on the inlet projections in the inlet chamber so as to enable gas to flow into the cylinder body, while an outlet valve closes the outlet passage, so as to prevent gas from flowing out of the cylinder body. When the piston assembly moves toward the valve assembly in a compression stroke, the inlet valve closes the inlet passage so as to prevent gas from flowing into the cylinder body, while the outlet valve rests on the outlet projections in the outlet chamber so as to enable gas to flow from the cylinder body.

Abstract: A single piece gasket valve plate assembly for sealing and separating assembly parts secured to the valve plate of a reciprocating piston compressor. The gasket includes a compressible peripheral portion for sealing and separating the valve plate to the cylinder head. The device also includes compressible central portions, which are spaced from and integral with the peripheral portion, wherein the central portions members are adapted to encircle the suction ports of the valve plate to seal and separate the suction ports from the discharge ports. A connecting portion extending through the discharge chamber connects the peripheral portion of the gasket to the central portions.

Abstract: There is disclosed a valve assembly and a reciprocating type fluid pump having a piston cylinder and a cylinder head together which define a fluid chamber. A first ring valve having a seal surface on one side is disposed within the fluid chamber adjacent to the cylinder head to close at least one fluid intake passage. A bias means is provided for urging the first ring valve against the seat on the head by abutting the ring valve on the side opposite from the seal surface, and the bias means includes a peripheral region which is connected to the fluid pump and retains the first ring valve between the cylinder head and the bias means.