Abstract: A pumping system including a bulk liquid container having a pump mounted in the container top with a suction tube attached to the pump and extending into the container. A drive motor is drivably attached to the pump. The pumping system includes an automatic shut-off valve which closes in response to an accidental dislodging of the pump motor from the pump.

Abstract: An axial multi-piston compressor includes a drive shaft, a cylinder block having cylinder bores formed therein and surrounding the drive shaft, and a plurality of pistons slidably received in the respective cylinder bores, wherein the pistons are successively reciprocated in the cylinder bores by a rotation of the drive shaft so that a suction stroke and a discharge stroke are alternately executed in each of the cylinder bores. During the suction stroke, a fluid is introduced into the cylinder bore concerned, and during the compression stroke, the introduced fluid is compressed and discharged from the cylinder bore concerned, such that a residual part of the compressed fluid is inevitably left in the cylinder bore concerned when the compression stroke is finished. The compressor further includes a rotary valve for allowing the residual part of the compressed fluid to escape from the cylinder bore concerned into two other cylinder bores disposed adjacent to each other and subjected to the compression stroke.

Abstract: An automatic shut-off valve for use with a chemical container and installed pump. The shut-off valve closing in response to an accidental dislodging of the pump motor from the pump.

Abstract: A gas compressor having a block with two opposed cylinder banks each having at least one cylinder formed therein, each bank having an upper end, a lower end, an inner wall, an outer wall, and opposite side wall, a floor interconnecting the cylinder banks at their lower ends, and a roof interconnecting the cylinder banks at their upper ends, a crankcase formed by the inner walls, roof and floor, the crankcase having a longitudinal axis extending through the roof and floor, first bearing positioned on the floor and aligned with the longitudinal axis for rotatably mounting one end of a crankshaft, an aperture through the roof, a second bearing positioned on the roof and aligned with the longitudinal axis for rotatably mounting the other end of the crankshaft through the aperture, a piston mounted in each cylinder and each having a connecting rod mounted on the crankshaft, the adjacent edge portions of the inner wall, the side walls, the floor and the roof defining an access portal to the crankshaft and to the co

Abstract: A piston pump is constructed so that the displacer or piston working strokes occur in sequence with varying phase differences which have a non-integral ratio to one another. Thereby, the risk of excitation of noise or resonance vibrations is greatly reduced.

Abstract: An integrated electric motor driven inline hydraulic apparatus comprising a housing, an electric motor having a stator fixed to the housing and a rotor surrounded by the stator. A positive displacement hydraulic pump comprises a cylinder block supported on bearings in the housing and includes a plurality of circumferentially spaced through bores in the cylinder block. A pair of opposing pistons reciprocate in each cylinder bore, the pistons extending from the cylinder block to cooperate with inclined surfaces which induce reciprocation of the pistons with cylinder block rotation. A valve is adapted to alternately connect the chambers between the opposing sets of pistons with a fluid inlet and a fluid outlet during cylinder block rotation. The housing has a hydraulic fluid inlet adjacent one end thereof such that hydraulic fluid from the inlet flows over the stator, air gap between the stator and rotor and over the rotor.

Abstract: A rotary power device comprises an open ended stationary housing defining an interior having a sinusoidal cam track disposed therein and end walls closing each open end of the housing. At least one fluid inlet port and one fluid outlet port is provided in the end walls for fluid communication between the housing interior and the exterior of the end wall. A rotor assembly is disposed in the interior of the housing for rotation about the axis of the housing. The rotor assembly includes a central shaft extending axially through the interior of the housing which is rotatably carried by each of the end walls. At least one heat conducting disk is mounted on the shaft adjacent each of the end walls for rotation with the shaft. Each disk has at least two openings equiangularly located with respect to one another and aligned with corresponding equiangularly disposed openings in the other disk for mounting open ended tubular cylinder elements which extend between the disks parallel to the axis of the shaft.

Abstract: A pneumatically driven hydrostatic actuator and a pneumatically driven recirculating hydraulic actuator are provided. Each of these actuators consists of a hydraulic pump fluidly coupled to an actuator. The pump is driven by a low inertia pneumatic motor that extracts pressure energy from pressurized gas and converts it to rotary motion. The pneumatic motor is preferably made from stainless steel A286 so that it can operate using pressurized hydrogen gas. The components of both actuators are in a closely coupled relationship so that they can be arranged in a compact unitary package.

Abstract: A slant plate type compressor including a compressor housing having a cylinder block is disclosed. A plurality of peripherally located cylinders are formed through the cylinder block. A piston is slidably fitted in each of the cylinders and is reciprocated by a drive mechanism which includes a slant plate. The slant plate includes a boss for mounting a balance weight ring thereon. The balance weight ring includes an annular depression formed at an inner peripheral portion thereof. The balance weight ring is firmly attached to the boss by different types of retaining means.

Abstract: A bent-axis compressor, particularly suitable for compressing refrigerant vapors, in which a plurality of spaced bent-axis double acting reciprocating pistons are operatively joined to two separate rotatable cylinder blocks driven by a power transmission around a statonary bent axis central shaft; the improved arrangement in which the central shaft and the pistons are hollow, a vapor inlet port is located at the center of each piston at the plane joining the two halves of the piston and on the side having an exterior obtuse included angle between the two halves, valved passageways leading from inside the piston to each head of the respective cylinder, and from the cylinder head to the interior of the central shaft for exit therefrom as a compressed vapor.

Abstract: When pumping chambers were provided between tapered discs of axial compressibility and expandability, the discs worked perfect in the subcritical pressure range. But in the supercritical pressure range the high pressure in fluid would depart the discs away from each other and open a gap between the discs because the force of pressure in fluid in the chamber between the tapered discs was higher than the internal strength of the material of which the respective coned element was made. The invention now discovers that it is possible to provide a means which prevents the departure of a coned ring from a neighbored ring. The invention obtains this by providing a means which presses under actions of pressure in surrounding fluid the neighboring coned ring elements at all times together for a close and perfect sealing between them.

Abstract: A radial piston pump in which an annular coupling device (10), whose axially directed extensions (11) each engage a working piston, has a preset break point (15) in the area of the axial extensions (11).

Abstract: A diaphragm assembly includes a pair of superposed flexible diaphragms adhesively secured to an annular spacer ring. The space between the diaphragms and the interior of the rings is filled preferably with de-ionized water. The resistivity of the water is monitored to detect conductivity changes upon leakage or diaphragm rupture when pumped materials or pump lubricant mix with the water. Diaphragm assembly and rupture detection methods are disclosed.

Abstract: A V-twin, two stage compressor has valve plates disposed between the head and cylinder of each stage and mounting free-floating flexible reed intake and exhaust valves therein. The flexible reeds are movably captured between the floors of respective reed recesses, and separate, non-fixed keeper bars are disposed over, but slightly spaced from, the reeds. Keeper bars over the exhaust reed extend above the valve plate for engagement by the head. A restrictor plate lies within a valve plate recess on keeper bars over the intake valve. A cored crankshaft providing motor drive shaft lubrication, and a removable counter-weight providing crankshaft use with one-piece connecting rods is disclosed. A cooling fan is driven by the removable counterweight and V-shaped fan shroud projections direct cooling air over the cylinders and heads while another cooling air port directs air over an intercooler.

Abstract: A fluid pump has two pairs of rectangular oppositely-disposed pistons. The pistons of each pair travel simultaneously in opposite directions at the same speed and over the same distance. Valving is provided by a reciprocating port plate, in face-to-face relation to the piston, driven in a circular path from two spaced crankpins and which in turn drives the associated piston. The sliding movement of the port plate controls the alignment of inlet and exhaust ports in the piston and port plate. The excursion or "throw" of the pistons can be varied from zero to maximum. A crankpin throw-adjusting mechanism simultaneously adjusts the throw of each crankpin, some in one direction, some in the opposite, so that all chambers are automatically adjusted for varying, but always identical, displacements. Self-lubricated seals between the piston and chamber walls are spring loaded, by an elastomerically sealed structure having non-linear deflection-to-force characteristics.

Abstract: A rotary piston engine energizable by internal combustion having an engine assembly whereby expansion of gas for driving the engine occurs on the outer circumference of at least one rotary disc element in the engine assembly and generated power is taken and exerted at a place that is relatively distant from the axis of a main drive shaft incorporated in the engine assembly so as to allow maximum torque generation in and by the apparatus even when operating at relatively low rates of rotation.

Abstract: A radial piston pump with at least one pair of pistons which alternately perform working strokes and are arranged in a stationary cylinder block with working chambers comprising inlet valves and outlet valves. An eccentric shaft controls the radial movement of the pistons and an annular device connects the radially outward end portions of the pistons. To avoid friction between eccentric and pistons, provisions are made that the eccentric shaft is supported outside of the cylinder block. The radially outward end portions of the pistons project radially outwardly from the cylinders and, by way of the annular device, take support on the eccentric of the eccendtric shaft. The eccentric is rotatably supported in the annular device.

Abstract: An integrated motor pump unit for use as a hydraulic fluid pressure source at a remote location incorporates a pump rotor affixed in the center of a motor rotor. The motor/pump rotor assembly spins on a fixed shaft in a combination providing both radial journal and axial thrust bearings. The stationary shaft assembly incorporates a piston drive mechanism which is angled, relative to the shaft axis, so that reciprocal movement of the pistons is developed as they rotate about the axis. The fixed rotor shaft is axially adjustable to control the end clearance between the pistons and cam surfaces, and contains fluid flow galleries to the journal and thrust bearings. A magnetically permeable sleeve is mounted between the motor stator and rotor to seal the hydraulic fluid within the rotor space, thereby maintaining the stator windings and associated electronic circuitry in a dry environment.

Abstract: A completely sealed, self-contained, liquid-cooled gas compressor is disclosed. It is made up of vertically superimposed and motive power connected electric motor, gas compressor and oil pump coaxially positioned within a vertical sealed cylindrical housing providing an oil sump at its lower end. Heat exchanger tubes are mounted within the oil sump and in an externally mounted heat exchanger for cooling the oil in the sump and cooling compressed gas derived from a series of compressor stages. Cooled oil is caused to continuously flow over the electric motor and compressor to provide cooling and lubrication and sealing of compressor pistons. A special type of axial swash or wobble plate compressor is used to obtain coaxial alignment and direct connection of motor driven shafts.

Abstract: An arrangement which includes a coned ring forms with the coned portion an interior space. The interior space decreases and increases its volume, when the coned portion of the ring is compressed and de-compressed. The coned ring has a radial outer portion and a radial inner portion. The radial inner portion forms a bore. The radial outer portion is provided with a seat face portion. The seat face portion contacts and bears a respective portion of a body, which may be a second coned ring, a thrust body or an outer ring. The arrangement is utilized to center a coned ring relative to a neighboring body or to provide and effectively seal a working chamber for the reception and expulsion of a fluid.

Abstract: An axial piston pump for pumping a medium such as a viscous liquid in which a wobble element is set into rotating movement via a piston, the wobble element moving at least one feed piston in a piston bore. The piston bore is intended to communicate, via a transverse line and a further piston bore which is occupied by a control piston, with an intake line for the medium to be pumped. By means of this axial piston pump, which is valve-controlled on the compression side and slide-controlled on the intake side, liquid having a high viscosity can be pumped without a loss of efficiency, and any noise produced by the pump can be reduced. These latter advantages are reinforced still further provided the feed system is received in a pump insert that is supported with respect to a pump housing by means of elastic bearing elements.

Abstract: A reversible power transmission unit comprising a housing and a cam block rotatably mounted in the housing and a pumping mechanism associated with opposed inclined surfaces of the cam block. A common shaft is rotatably mounted in the cam block and has its ends extending beyond the cam block. Each pumping mechanism includes a cylinder barrel mounted on the shaft for rotation with the shaft and having a plurality of cylinders with pistons slidable therein and operatively associated with a surface of the cam block. Each cylinder has a port opening to a valve plate provided with inlet and outlet ports in communication with inlet and outlet passages at each end of the housing. When one of the pumping mechanisms is operated as a motor, it drives the other pumping mechanism as a pump.

Abstract: A radial plunger pump is provided which includes a motor housing having a motor mounted therein. A pump housing is further provided and has a pump portion defined therein. A shaft is mounted between the motor and the pump portion so that the pump portion operates when rotation of the motor is transmitted to the pump portion by rotation of the shaft. A constant pressure chamber is defined between a first seal member and a second seal member both of which are fixed to the pump housing. The leakage of oil from the pump housing toward the motor housing is prevented by the first and second seal members and the constant pressure chamber. Further, a plate is provided within the constant pressure chamber which rotates with the shaft and prevents the entry of foreign objects into the constant pressure chamber through a constant pressure port which communicates to the ambient atmosphere.

Abstract: A system for removing material with a high velocity jet of working fluid comprises an ultra-high pressure pump having an odd numbered plurality of composite fluid cylinders disposed radially outwardly of an axis of rotation of an eccentric crank. Each composite cylinder includes an inner low pressure cylinder and an outer high pressure cylinder coaxially aligned therewith and the longitudinal axes of the composite cylinders are spaced equilaterally around the crankshaft axis of rotation in a common radial plane. A low pressure piston is mounted in each low pressure cylinder for reciprocation between inner and outer ends and each low pressure piston is interconnected with the crankshaft eccentric to reciprocate on sequential pressure and exhaust strokes during each revolution of the crankshaft. Each high pressure cylinder includes a high pressure piston interconnected with a respective low pressure piston and adapted to reciprocate therewith.

Abstract: A power transfer unit coupling two otherwise separate hydraulic systems for bidirectional transfer of hydraulic power therebetween without transfer of fluid between the two systems. Control of the power transfer unit is effected using only hydraulic pressures, and static operation of the unit is maintained without power transfer until a determined pressure differential between the coupled systems is achieved to reduce wear and increase service life of the unit. Once dynamic power transferring operation of the unit is initiated, a pressure differential lower than the determined level is maintained between the two systems.

Abstract: A radial piston pump includes an axially slidable rotor which is rotatably connected to a connected shaft through a spring clutch engaging one end face of the rotor. The rotor is located in a housing or in the stator so as to constitute a frontal gap between the rotor and the housing or stator on the pressure side of the machine, through which frontal gap, during operation of the device, pressure fluid of the pressure side is permitted to be supplied to at least one sector area of that end face of the rotor opposite the spring clutch. This causes centering of the rotor by the spring clutch and by the pressure of the pressure side in such a manner that no metallic contacts occur in an axial direction and, thus, no friction losses.

Abstract: A rotating drum pump having a plurality of fluid driven pistons includes a pump housing with an enclosed rotating drum, and connection openings for a supplied and discharged driving fluid and for a supplied and discharged pump flow located in end walls of the housing. The drum comprises several cylinder spaces arranged axially in pairs and concentrically arranged inside the envelope surface thereof. In the cylinder spaces, which are arranged axially in pairs and are separated by a partition, there are arranged a drive piston and a pump piston interconnected by a piston rod passing in a sealed manner through the partition.

Abstract: A pressure intensifier for a fluid comprises at least three piston assemblies disposed along mutually parallel axes equiangularly disposed with respect to a central axis of the intensifier and radially equidistant therefrom. Each piston assembly has two opposed high pressure cylinders and low pressure cylinders. Fluid is supplied to the low pressure cylinders and discharged through a low pressure valve operatively coupled by a swash plate to the pistons of each assembly so as to be driven thereby. A high pressure collector, optionally in the form of a closed circuit, is provided for receiving high pressure fluid from the high pressure cylinders.

Abstract: An electric motor driven inline hydraulic apparatus comprises a common housing, a stationary shaft mounted in said housing and spaced pump cylinder block subassemblies that rotate around and are mounted on said shaft. Each subassembly includes a cylinder block and a plurality of circumferentially spaced pistons. The cylinder block subassemblies are positioned such that the pistons of one subassembly extend toward the other subassembly. A common yoke plate is mounted between the two cylinder blocks and bears the two groups of piston shoes, one on each of its two bearing surfaces. Each cylinder block is driven independent of and in direction opposite to the other by an electric motor integrally mounted such that its hollow rotor houses the block and drives it. All components described above are contained in one housing and operate submerged in hydraulic fluid.

Abstract: An apparatus for generating high hydraulic pressure with reduced pulsations, comprising a valve case attached to a motor main body and having a plurality of pneumatic cylinder units arranged therearound, a rotary valve rotatably fitted in the valve case, links each having one end pivoted to the piston of each pneumatic cylinder unit and the other end connected to an eccentric shaft portion provided on a crank shaft or the rotary valve, and hydraulic bases connected directly to the pneumatic cylinder units individually, the hydraulic pressure fluid being caused to flow-out from the hydraulic bases in succession by the rotation of the rotary valve, in such a manner that when the outflow of the fluid from one of the hydraulic bases is about to cease, the fluid starts to flow out from another hydraulic base, and when the flows of hydraulic fluid from the two hydraulic bases combine, the pulsation of the flow from one base is offset by that of the other single flow, making it possible for the hydraulic fluid to un

Abstract: In a fluid pump or motor improvements are provided to the piston shoes therein to permit a higher pressure in the respective device. Other improvements are done to the hydrostatic bearings in radial piston or radial chamber type fluid motors and pumps. A further arrangement is, that plural pistons are applied to permit the use of two different fluids in the respective device. This leads also to the application of disc springs and their modification in a pump or motor to make the pumping of non-viscous fluids like water possible at very high pressure.

Abstract: A motor-driven radial plunger pump has an outer housing enclosing a motor section and a pump section drivingly connected thereto. The motor section has a motor housing cooperating with the outer housing to define a fluid passage having a fluid inlet adjacent to a part of the motor housing in which a brush unit is disposed. The fluid passage contains a filter element and has a recess disposed upstream thereof and adjacent to motor magnets so that magnetic particles contained in the fluid flow are magnetically adhered to and deposited on the bottom of the recess. The pump section has a rotor with radial plungers slidably disposed in cylinder bores in the rotor. The cylinder bores have radially inner end successively communicated with a suction passage communicated with the fluid passage between the outer and motor housings through feed holes formed in a coupling disc plate drivingly connecting the motor with the rotor.

Abstract: A hydraulic arrangement has a housing which includes a first space of a definite first pressure and a second space with a lower second pressure. A primary pump supplies fluid under the first pressure into the first space to open the entrance ports into cylinders, which contain pistons therein, whereby the pistons are forced partially out of the cylinders and into the mentioned second space. In the second space the pistons are moved inwardly into the cylinders by an eccentric cam ring to supply a flow of fluid of a fourth pressure out of the outlet of the arrangement's housing. In modified embodiments the arrangement is a pressure transmission, which takes in a third pressure to drive a motor in the arrangement which in turn drives the shaft with the eccentric cam and the unit then exits the fourth pressure, which might be a very high pressure of up to more than ten thousand pounds per square inch.

Abstract: A pump of the diaphragm type. The pump has a replaceable unitary cartridge which fits into a cavity of the pump casing. The casing is in two parts, an upper casing and a lower casing, which are held together by detachable means for replacing the cartridge.

Abstract: A fluid pressure energy translating device comprising a housing defining a cavity and a drive shaft having a portion thereof rotatably mounted in the housing and extending into the cavity. The cavity has an open end remote from the drive shaft and a valve block closes the open end of the housing. A removable rotating group cartridge is positioned in the cavity between the valve block and drivingly engaged with the shaft. The cartridge comprises a valve plate engaging the valve block and an angle block, a rotatable cylinder barrel interposed between said valve plate and said angle block in abutment with the valve plate and in driving relation with the drive shaft. The cylinder barrel has a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, a piston in each cylinder, shoes connected to the pistons and engaging an inclined surface on the angle block. The valve plate and angle block are interconnected to form a removable cartridge.

Abstract: In many aircraft, there are flight control surfaces positioned by mechanical actuation systems that are driven by hydraulic power drive units. There are also devices for transmitting hydraulic power from one aircraft hydraulic system to another in the event that one of the system's pumps fails. An integration of structure to perform both of these functions in a single unit would result in a reduction in cost and weight as well as increased reliability. The integrated power drive and power transfer system has a pair of variable displacement hydraulic devices each in a separate hydraulic circuit and each having a drive shaft connected into a summing gear train connected to an output shaft.

Abstract: Disclosed herein is a two-stage fluid pump comprising a base member defining a sump, a first fluid pumping unit including a pumping piston and supply and discharge passages, a second fluid pumping unit including a pumping piston and supply and discharge passages, a plate member fixed on the sump and having mounted thereon the first and second fluid pumping units, the plate member including a conduit communicating with the first unit discharge passage and with the second unit supply passage and a discharge conduit communicating with the second unit discharge passage and terminating in a discharge port in the plate member, a drive engaged with the pistons for effecting reciprocation thereof and including an electric motor mounted on the plate member and including an output shaft, a drive member mounted on the plate member for rotation and having an eccentric portion drivingly connected with the pistons to effect reciprocation thereof in response to rotation of the drive member, and a speed reducing mechanism op

Abstract: A hydraulic pump unit, comprising an electric motor, the stator (5) of wh is disposed in a housing defining an oil reservoir and the rotor of which is mounted on a shaft which drives a hydraulic pump. Each front end of said stator is associated with an end shield for a shaft bearing. A pump element or the pump is secured to at least one end shield. Elongated connecting members which are distributed about said shaft in the circumferential direction support said end shields. The connecting members are designed as rods (17), abut against the outer circumference (7) of said stator (5) and, in the undeformed state, guide said stator in a close sliding fit. At least one tightening strap (19) encompasses said rods (17) and the outer stator circumference (7) for deforming said rods (17) until said stator is fixed in position and for pressing said rods against the stator circumference. A means for preventing rotation can be provided between said stator and said rods or said tightening strap.

Abstract: A pumping apparatus for pumping heavy viscous chemicals and the like. The apparatus has a pump means having means for attachment to a container of the viscous chemicals and the like, and has driving means including a motor and means for detachably connecting the driving means to the pump means so that the pump means and driving means are separable, and the driving means may be used with other pump means.

Abstract: A servo pump for use in a hydraulic system. The servo pump is constituted by a variable displacement type hydraulic pump adapted to be driven by a high-speed motor and to hydraulically drive an actuator. The motor and the pump are housed in a common casing. The motor shaft and the pump shaft are integrated to form a common rotary shaft which is supported rotatably at both its ends by end bearings and at its intermediate portion by an intermediate bearing.

Abstract: An apparatus for moving a fluid medium comprising a positive displacement member movable to move the fluid medium and a drive mechanism adapted to be driven by a motor for driving the positive displacement member to move the fluid medium. The drive mechanism includes a wobble plate coupled to the positive displacement member for driving the positive displacement member. The drive mechanism is responsive to back pressure on the positive displacement member for adjusting the angle of the wobble plate to thereby change the volume of the fluid medium movable by the positive displacement member.

Abstract: A pump for pumping a mixture of a liquid and a coarse-grained material comprises a motor-driven rotor (1) having a plurality of longitudinal cylinders (5, 6, 7, 8) having individual piston members (9), whereby these are driven back and forth by means of a pressure medium which is supplied to one end of the rotor. At the other end of the rotor, the cylinder openings, during rotation, pass a stationary inlet channel (21) and a stationary outlet channel (22) for the mass that is to be pumped. The rotor (1) is designed as a truncated cone, the cylinders being obliquely positioned with respect to the axis of rotation and having the greatest radial distance thereto at the cylinder ends which cooperate with the above-mentioned inlet and outlet channels.

Abstract: Improvements in a compressor unit of the type which includes a radial piston compressor and a drive motor disposed in a housing about a stationary shaft are disclosed. The shaft is suspended from the housing by an elastic coupling to substantially suppress the transmission of vibrations and sound from the compressor unit to the housing. In a disclosed embodiment, the shaft is suspended by a rod-shaped elastic support member fastened to the housing and protruding into a cavity defined by a hollow portion of the shaft where the elastic member is connected to the shaft. According to one aspect of the invention, transmission of vibration and sound can be attenuated without the need to provide additional space by providing the unit's pressure outlet duct as the elastic support member.

Abstract: A two-way transducer for transfering power between two hydraulic circuits, e.g. to ensure uninterrupted hydraulic power in all the hydraulic circuits of a twin engined aircraft, even when one engine has failed. A body (1) has an elongate cavity (4) housing two barrels (14, 15) of cylinders (26) with pistons (28) slidably mounted therein. A common drive shaft (17) enables each barrel to drive the other. A wedge (16) located between the barrels provides two oblique surfaces (18, 19) for the piston heads to slide over. Sealing means (38, 39, 43, 44) to prevent fluid leaking from one circuit to the other. In operation one barrel operates as a swashplate type of motor driving the other barrel which then acts as a pump.

Abstract: Improvements are disclosed in a radial piston compressor having pistons reciprocally disposed in the piston spaces of a cylinder block rotatably supported on a stationary shaft. The radial motion of the pistons is controlled by a rotatable guide which is arranged with its axis of rotation eccentrically to the axis of rotation of the cylinder block. The portion of the stationary shaft covered by the cylinder block includes a suction slot and a pressure slot extending along a portion of the circumference of the stationary shaft. Oil for sealing the cylinder block and the stationary shaft is introduced into the gap between the cylinder block and the stationary shaft. Due to the rotation of the cylinder block, the piston spaces are communicated alternatingly with the suction slot and the pressure slot through an opening provided in the bottom of the piston spaces.

Abstract: A coupling arrangement for coupling a radial piston compressor to an external rotor drive motor is disclosed. The rotor of the drive motor is coupled to a rotatable cylinder block by arranging a plurality of leaf springs between the cylinder block and arms projecting from the rotor. The cylinder block rotatably mounted on the motor stator shaft supports the rotor at the compressor end of the drive motor. The leaf springs prevent canting of the cylinder blocks with respect to the rotor of the drive motor due to manufacturing and alignment errors.

Abstract: The engine disclosed herein comprises a number of pairs of pistons, the two pistons in each pair acting in unison and the number of pairs being arranged parallel to each other and said pistons also being positioned parallel to and in a circle around the mainshaft which has a cam lobe located at a convenient part of the mainshaft and encircling the mainshaft. The cam lobe has opposite surfaces which have rises and dips, or in other words, sinusoidal surfaces, and are in contact with pairs of bearings attached to connecting rods, these bearings being on opposite sides of the cam lobe and at one time being driven in one direction by one of the two pistons in each pair and then at another time in the opposite direction by the other piston in that pair, the two pistons of that pair being connected to each other by the same connecting rod carrying the bearings which press against the cam lobe.

Abstract: Swash plate driving means for cryogenic coolers wherein multiple compress and regenerators are driven. The swash plate driving means may drive one or more compressors off one or both sides of each swash plate, and one or more regenerators may simultaneously be driven by separate swash plates. The swash plates are formed to provide flat topped and bottomed repetitive pressure waves.

Abstract: A reciprocation pump has a plurality of radially arranged pumping chambers each provided with a piston and operatively connected to an external liquid absorbing pipe and an external liquid discharging pipe, and has a central drive mechanism comprising drive members each directly connected to the corresponding one of the radially arranged pistons and a valve structure operated in association with the drive members by a pressure activated fluid injected into the pump at an external inlet thereof, said valve structure sending the pressure activated fluid into and out of the pump simultaneously during the operation thereof.

Abstract: A developing machine has a battery of vessels which receive metered quantities of liquid from discrete membrane-type pumping units. The pumping units constitute part of an apparatus having a single drive for the reciprocable membrane-deforming pumping elements of all units. The components of the drive for the pumping units as well as the pumping units themselves, are discrete modules which are rapidly connectable to or detachable from a single supporting frame. The drive has a rotary eccentric which transmits motion directly to the pumping elements of all pumping units. The strokes of the pumping elements are adjustable independently of each other.