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 hydraulic power unit combining a number of cylinders using ball bearings to displace hydraulic fluid sequentially with controlled flow to a number of hydraulic actuators. A power unit could combine a minimum of two cylinders through ten or twelve cylinders in a practical hydraulic power unit. The inherent bi-directional nature of this combination of fluid displacing ball bearings, cylinder and porting arrangement offers a unique opportunity to change fluid flow by reversing input drive. The torsional reaction component of the opposed reciprocator drives is utilized to rotate the core cylinder assembly to realign outlet and return fluid flow. This realignment can be used to reverse the fluid circuits or redirect the fluid to other work.

Abstract: A precision metering, multiple fluid pumping system comprised of a main pump for pumping a primary fluid and an auxiliary pump for pumping a secondary fluid adjustably linked to work in unison with the main pump. The auxiliary pump is linked to the main pump through a rack and pinion gear system connected to an oscillating arm that operates the auxiliary pump simultaneously with the main pump. The auxiliary pump is infinitely adjustable over a selected range by varying the connecting point of the auxiliary pump to the oscillating arm. The connecting point is varied by a worm screw adjustment that provides precision adjustment and metering of a secondary fluid. The system also includes a clutch mechanism between the auxiliary pump oscillating arm and a rack and pinion gear system to disengage the auxiliary pump for priming.

Abstract: An electromagnetic linear compressor has a linearly reciprocating piston (10) biased in one direction by a helical coil spring system. A rotational bearing (40) supports one end of the spring system (20a, 20b). To avoid uneven wear due to forces applied by the spring system, the spring system comprises two helical coil springs (20a, 20b) acting in series to bias the piston (10), and the rotation bearing (40) transmits thrust between the two springs while permitting relative rotation of the two springs about their common axis. The compressor also has a turbine (30) for exerting a unidirectional rotational force to rotate the piston (10) about its axis gradually during operation of the compressor.

Abstract: Fuel feed pump for a fuel injection pump for internal combustion engines, with a pair of intermeshing gearwheels, the said pair being driven in rotation in a pumping chamber (3), which gearwheels feed fuel out of a suction space (13), connected to a supply tank, along a feed duct (17), formed between the end faces of the gearwheels and the circumferential wall of the pumping chamber (3), into a pressure space (15) connected to the fuel injection pump, and with a bypass duct (25) which connects the suction space (13) to the pressure space (15) and in which a pressure valve (31) controlling the maximum fuel pressure in the pressure space (15) is arranged. At the same time, according to the invention, the bypass duct (25) is integrated into the housing (1) of the fuel feed pump in such a way that the pressure valve (31) can be inserted into the housing (1) of the feed pump completely via the inlet orifice (19) of the suction space (13).

Abstract: A vacuum pumping stand for the cyclic pumping-down of containers and for maintaining an operating vacuum in the containers, for the pumping-down of the container. The vacuum pumping stand has a first and a second vacuum pump which are arranged in series and form a first and a second pumping stage. The first vacuum pump is a radial flow compressor with a controllable throttle which is located in the intake pipe to the first vacuum pump. The second vacuum pump is a rotary compressor or a water ring pump. The second vacuum pump is located in a vacuum pipe in parallel to an outlet pipe of the first vacuum pump and is connected with its inlet at a branch-off with the outlet pipe. A control part is situated in each of the outlet pipe and the vacuum pipe downstream of the branch-off for directing the delivered volume at higher pressures from the first vacuum pump directly or at lower pressures from the first vacuum pump by way of the second vacuum pump 13 to the outlet 10 of the vacuum pump stand.

Abstract: A liquefied gas pump includes a piston and a cylinder which form a pump chamber into which a liquefied gas entrance path and a liquefied gas discharge path open. Relative upward and downward motion between the piston and cylinder provides a repetition of alternating suction and discharge stroke. Liquefied gas is sucked into the pump chamber through the entrance path during the suction strokes, and is discharged out of the pump chamber through the discharge path during the discharge strokes. A separate bubble discharge path opens into said pump chamber at a location in the bottom of an upward recess formed in the top portion of the pump chamber. The bottom of the recess is located above the location where the opening of the liquefied gas discharge path is formed.

Abstract: A fluid pumping apparatus is disclosed in which wobble pistons are rigidly connected to arms of a swashplate that is rotatably mounted on bearings which are mounted on a drive shaft. The axis of the bearings is at an acute angle to the axis of the shaft. The wobble pistons move within cylinders whose bores are parallel to the axis of the shaft. Two or more pistons and cylinders are arranged symmetrically about the shaft axis, and cylinder-piston combinations are mounted at opposite ends of a through shaft.

Abstract: A multiple-chamber pump (10, 52, 78) for dispensing precise volumes of fluids. The pump is especially suited for dispensing volumes in the microliter range. At least three chambers (18, 20, 22) comprising preferably spherical segments are sequentially connected by conduits (24, 26, 28, 30) and are closed by a diaphragm member (14) which is movable into or out of the chambers by application of pressure or vacuum on one side of the diaphragm to draw liquid into the chambers and then to expel the liquid from the chambers, either forward or backward according to an operating sequence. Control means are provided for alternating and sequencing the application of pressure and vacuum such that metered volumes of liquid (50) are pumped from chamber to chamber. Tiny, precisely controlled drops of liquid can be dispensed. A plurality of ganged pumps (94) also can be provided in a single pump body (96) to meter independently a plurality of fluids (100, 102, 104) simultaneously.

Abstract: A vapor recovery pump for pumping flammable vapors is disclosed. The pump includes a pump unit that defines a pump chamber into which the vapor is first drawn and then exhausted from. A motor contained in a motor housing provides the motive force for energizing the pump unit. A single-piece inboard head seals the pump chamber and the motor housing and spaces the pump chamber away from the motor. Removable flame arrestor assemblies are attached to the inlet and outlet ports into which the vapor is, respectively, drawn into and exhausted from. A gland assembly integral with the motor housing provides a seal around the conductors that extend to the motor.

Abstract: A fuel-injection pump for internal combustion engines, particularly an in-line injection pump for diesel engine, with a control bore in the pump cylinder and with an upper control edge for determining the start of feed and an oblique spill edge for determining the end of feed. The pump piston is rotated about its longitudinal axis in order to set the desired feed quantity, for the purpose of achieving a better regulating behavior of the system as a whole, comprising the fuel-injection pump, feed-quantity regulator and internal-combustion engine. The spill edge is subdivided, along its run over a part of the circumference of the pump piston, into portions with different angles of inclination (.alpha..sub.1, .alpha..sub.2) to the axis of the pump piston. The control-edge portion having the large angle of inclination (.alpha..sub.

Abstract: A sound barrier cover for a compressor unit which has a housing provided by a substantially continuous wall which provided with a plurality of access ports therethrough. The barrier cover has first and second shell sections configured to lie close to the housing wall and substantially envelope the same wherein the shell sections are configured to provide two substantially longitudinally oriented halves each having sound absorbing material affixed to its inner surface. These halves have perimeters with portions thereof formed with mating tongue and groove structure and carry cooperating components of snap-fastener devices in close proximity to the perimeters. These snap-fastener devices are adapted to hold the perimeters in contact with each other and with the sound absorbing material in resilient contact with the housing.

Abstract: Metering pumps for the metered feed of liquids are fitted with an intake valve built into an intake line from an intake container, a pump chamber downstream of it with a pumping component altering its displacement volume, a pressure valve leading to the metering connector and a vent and by-pass valve built into a return line leading to the intake container. In order to keep the quality of by-passed metering liquid as small as possible while maintaining adequate venting, there is valve chamber between the pressure valve and the pump chamber and separated from the latter by a return valve and a movable control wall, in which is incorporated the vent controlled by the control wall, opening on the suction stroke of the pumping component and closing on its delivery stroke. .There is also preferably in the valve chamber a prestressed displacement wall altering the volume of the valve chamber in the opposite direction to that of the control wall.

Abstract: This invention is directed to a closing member of an inlet valve of a pressure-medium-traversed piston of a reciprocating piston pump. The closing member is disposed as fully as possible in the piston to minimize the dead air space. The piston has a longitudinal bore in which a stem engages the closing member, which stem emanates from a valve disk. The stem is embraced by an at least approximately frustoconical helical compression spring acting as a closing spring. This is held, with an end segment of smaller diameter, non-twistably against the stem. A shoulder of the longitudinal bore is located on the valve seat side and exhibits at least one cross-sectional alteration for the screw-like action upon the end segment of larger diameter of the closing spring. The closing spring is thus able to be sunk into the longitudinal bore and biased in place. The reciprocating piston pump can be used, for example, for slip-regulated braking systems of motor vehicles.

Abstract: A diaphragm pump comprised of a shaft, means for rotating the shaft at a speed of less than 3,000 revolutions per minute, a first connecting rod connected to a first diaphragm and operatively connected to the shaft, a second connecting rod connected to a second diaphragm and operatively connected to the shaft, and means for converting rotary motion of the shaft into reciprocating linear motion of both the first connecting rod and the second connecting rod such that, as the first connecting rod is moved in a first direction at a first rate of travel, the second connecting rod is simultaneously moved in a second linear direction at a second rate of travel, which is equal to said first rate of travel, and wherein the second linear direction is the opposite of the first linear direction.

Abstract: A low profile positive displacement pump system is disclosed. The pump system includes a gasoline powered engine with a vertically disposed crank shaft. The system also includes a piston pump with at least one horizontally disposed piston, and a pump shaft assembly which mounts onto the crank shaft. A base including a cavity for retaining the pump is provided. The engine mounts directly onto the base, and fixes the orientation of the pump shaft assembly with respect to a driven end of each piston. The pump shaft assembly includes at least one eccentric camming surface for contacting a driven end of the piston and for causing each piston to complete one stroke per revolution of shaft rotation.A high pressure piston pump base is disclosed, comprising a main body including an upper surface, wherein the upper surface is suitable for mounting directly to a mounting flange of a gasoline powered engine having a vertically disposed drive shaft.

Abstract: A vacuum aspirator apparatus uses circulating water from a reservoir while avoiding or reducing temperature rise in the circulating water. The apparatus consists of a reservoir with aspiration and cooling circuits, both of which are external to the reservoir, the aspiration circuit containing one or more aspirators with vacuum ports at which a vacuum can be drawn.

Abstract: A distributor fuel injection pump for internal combustion engines having at least one pump piston, which is guided in a cylinder bore and defines a pump work chamber therein and whose axial feed stroke motion is produced by a cam drive having at least one roller running on an annular cam race; at least one part of the cam drive is rotated to adjust the supply onset of the pump piston. This adjusting device is integrated into the housing which contains the cam drive by providing that the adjustable cam ring has radially protruding pressure vanes, each of which protrudes into a pressure chamber in the pump housing and divides this chamber into two pressure subchambers. Rotating the cam ring for the purpose of adjusting the supply onset of the pump piston over a wide angular range can now be effected by imposing pressure in alternation upon these pressure subchambers, which act in opposition upon the pressure vanes or the cam ring.

Abstract: The invention relates to a spring-loaded nonreturn valve. For ease of production and assembly, a spring element is designed as a leaf spring which is bent in a zigzag shape and is arranged in a transverse groove of a valve closure body. For connection to a spring holder, the leaf spring has a loop with which it is snapped in on a section of the spring holder bent out of wire. The spring holder has a spring ring which is integral with it and is inserted in a groove in a blind bore of a delivery piston, forming a valve housing, of a reciprocating pump.

Abstract: A cryogenic pump is disclosed for pumping liquified gas from one container to another container or a point of use. The pump comprises a series of chambers and coupling valves for progressively pumping a liquified gas from an inlet end located within and adjacent to the bottom of the container to an outlet conduit. The pump arrangement allows the container to be substantially emptied thereby avoiding waste of the contained liquified gas.