Abstract: A radial piston pump for generating high-fuel pressure in fuel injection systems of internal combustion engines, in particular in a common rail injection system, having a drive shaft which is supported in a pump housing and has an eccentrically embodied shaft portion on which preferably a plurality of pistons, disposed radially in a respective element bore are supported relative to the drive shaft. The pistons move back and forth in the respective element bore by rotation of the drive shaft. An axial bearing disk with a plurality of lugs which are disposed on the circumference and engage corresponding grooves in the pump housing is mounted in the pump housing with the aid of a retaining device.

Abstract: A radial piston pump for a high-pressure fuel supply in fuel injection systems of internal combustion engines, in particular in a common rail injection system, having a drive shaft which is supported in a pump housing and is embodied eccentrically or has cam-like protrusions in the circumferential direction. A plurality of pistons are disposed radially in given cylinder chambers relative to the drive shaft (4), and the pistons are movable radially back and forth in the respective cylinder chamber by rotation of the drive shaft. In carrying out the invention, a transverse force absorbing device is disposed between each piston and the drive shaft. This has the advantage that only forces in the longitudinal direction are brought to bear on the pistons. This means that virtually no moments act on the pistons.

Abstract: The invention relates to a radial piston pump for high-pressure fuel delivery in fuel injection systems of internal combustion engines, in particular in a common rail injection system, having a housing, a drive shaft that is supported in the pump housing and has an eccentrically embodied shaft segment. A ring is slidingly supported on the shaft segment and cooperates with a plurality of pistons. The pistons are disposed radially with respect to the drive shaft in a respective cylinder chamber. Ends of the pistons oriented toward the drive shaft each have a respective plate. To improve engine efficiency, the cylinder chambers are filled with less fuel as the demand drops, this prevents increased wear and damage from occurring during operation. The problem of wear and damage is solved in that all the plates are kept in contact with the ring by a leaf-spring-like device, in particular a single clamp. In a radial piston pump in which a plate is held by a plate holder, the plate holder is secured to the ring.

Abstract: A radial piston pump includes cylinders oriented radially to an axis of rotation of an eccentric shaft and pistons arranged radially movably in the cylinders against the force of a spring member such that the pistons are pressed radially outwards by the rotational movement of an eccentric and radially inwards by the spring members. The pistons have at least one inlet opening connected to an inlet chamber of a pumping medium in the radially inner position of the pistons, and the pumping medium is pressed into a pressure area during the radially outward movement of the pistons. An eccentric shaft is mounted in sliding bearings arranged on both sides of the eccentric and the shaft is traction driven. A pressure connection between an annular duct and one of the sliding bearings advantageously provides a bearing gap between the sliding bearing and the eccentric shaft to constantly supply a close film of oil which has a damping effect upon the radial movements of the eccentric shaft.

Abstract: A radial piston pump for a high-pressure fuel supply in fuel injection systems of internal combustion engines includes a drive shaft, supported in a pump housing, and a plurality of pistons disposed radially with respect to the drive shaft in respective cylinder chambers. The pistons are movable back and forth in the radial direction, and for each piston, one metal insert part forming the respective cylinder chamber is provided inside the housing and radially to the drive shaft to communicate with the intake side and with the high-pressure side. The respective insert part in the direction of the drive shaft between two flangelike metal housing parts with bearing faces extend perpendicular to the drive shaft and rests on these faces. The respective insert part has a fuel delivery opening and a fuel discharge opening, which discharges in the region of the bearing faces and are aligned with a further respective delivery and discharge opening in the housing parts.

Abstract: A radial piston pump for high-pressure fuel delivery in fuel injection systems of internal combustion engines, particularly in a common rail injection system. A drive shaft is supported in a pump housing and is embodied as eccentric or has cam-like projections in the circumference direction. A number of pistons are each disposed in a respective element bore and are situated radially in relation to the drive shaft. The pistons can be set into a reciprocating motion in the radial direction inside the respective element bore through the rotation of the drive shaft in order to aspirate fuel by way of an intake conduit in which an intake valve is disposed. The fuel is aspirated into a cylinder chamber that is defined by the piston in the element bore and is connected to a high-pressure conduit in which a high-pressure valve is disposed. The element bore is disposed together with the intake conduit and the high-pressure conduit in an element head.

Abstract: The invention relates to a radial piston pump for high-pressure fuel delivery in fuel injection systems of internal combustion engines. The pump includes a drive shaft that is supported in a pump housing and is embodied eccentrically or has a number of cam-like projections in the circumference direction, with a number of pistons that are disposed radially with regard to the drive shaft, each piston in a respective cylinder chamber. Each piston can be set into a reciprocating motion in the cylinder chamber upon rotation of the drive shaft. The pump includes an intake side and a high-pressure side check valve, and a component which has a through opening that constitutes the cylinder chamber, into whose radially outer end, a sealing element is inserted. The intake side check valve is integrated into the sealing element.

Abstract: A suction-throttled pump, comprising at least one displacement body for the delivery of a medium and movable in a delivery chamber, into which opens at least one inflow channel extending between the delivery chamber and a suction chamber, and comprising a suction control valve, the pump being characterised in that the suction control valve (33; 33′; 33″) co-operates directly with the inflow channel (25; 25′) and is arranged at the end thereof facing the suction chamber (27).

Abstract: Disclosed is a self-sealing valve and cylinder configuration, an internal combustion rotary engine, or pump or compressor, with a rotating central housing which includes at least one cylinder aperture, a non-rotating timing pulley mount concentrically positioned within the central housing, a crank shaft eccentrically mounted within the central housing, a valve housing attached to the central housing and which retains a cylinder between it and the central housing, a piston within each cylinder, the piston rod is eccentrically mounted to the crank shaft, and a rotating valve within each valve housing.

Abstract: The present invention discloses an electric-motor-and-pump assembly including an electric motor, and the pump-sided end of the motor shaft (3) extends through a housing lid (10), is supported with at least one roller bearing (13) on a pump housing (2), and its purpose is to drive pump pistons (17, 18). The housing lid (10) includes a bore in the area of a shaft passage (9) which leaves open a gap (11) to the motor shaft (3). The gap (11) connects a pump-sided crank chamber (14) to an inside space (19) of the motor. The assembly includes a sealing element (20) which shuts off the gap (11).

Abstract: A hydraulic motor comprises a fixed case, a reaction member secured to the case, a cylinder block mounted to rotate relative thereto about an axis of rotation, and an internal fluid distributor prevented from rotating about the axis relative to the case. The case has a “distribution cover” portion situated around the have respective first and second housings are formed to received a pin which prevents relative rotation while allowing the distribution cover in an axial direction, thereby preventing the distributor from separating from the cover while the motor is being assembled.

Abstract: A fuel supply pump having a plurality of radially disposed plunger sleeves each containing a pumping plunger with a driven end reciprocally movable within the plunger sleeve between a pumping position and a filling position. The fuel supply pump includes a rotatable drive member and a plurality of sliding shoes. Each shoe has a first face adjacent a respective plunger driven end and a second face adjacent the drive member. In one variation, each shoe first face includes a socket which the plunger driven end snaps into and is captured by, creating a sliding shoe assembly. A case couples all of the sliding shoe assemblies. In another variation, the cage includes apertures which the plunger driven end snaps through, thereby capturing the plunger. The plunger driven end engages a seat included on the sliding shoe first face. Rotation of the drive member moves each shoe, and thereby, each plunger toward the pumping position.

Abstract: A radial piston pump for high-pressure fuel delivery in fuel injection systems of internal combustion engines, with a drive shaft which is supported in a pump housing. The drive shaft has an eccentrically embodied shaft section upon which a ring is supported in sliding fashion by means of a bearing bush. The ring cooperates preferably with a number of pistons disposed radially in relation to the drive shaft each in a respective cylinder chamber. The eccentric shaft section and the ring are fixed in the axial direction by means of stop faces and a bearing gap is provided between the bearing bush and the eccentric shaft section into which gap lubricant travels from the inside of the pump housing. The relationship of the parts improves the supply of lubricant to the bearing gap and the hub end faces of the pump housing are embodied as conical so that a wedge-shaped gap is produced which narrows in the direction of the bearing gap.

Abstract: A high-pressure reciprocating pump is constructed such that a plurality of plungers connected to a driver are made to move back and forth and intake channels or discharge channels are opened and closed by valves in synchronism with movements of the plungers for transferring a fluid under high pressure.

Abstract: A Positive Fluid Displacement Device (PFDD) with a removable Fluid Displacement Module (FDM) having two opposing pistons connected to a drive block. The drive block slides over a crankpin bearing in assembly to provide orbital piston motion. Opposing cylinders are held within a carriage for reciprocating motion. An opening in the reciprocating cylinder head allows fluid communication to the displacement chamber through inlet and outlet ports in a floating port plate. The flat surfaces of the port plate and cylinder head wipe across each other during cylinder head movement. The piston head carries a protrusion sized to fill the cylinder head opening. Micro-adjustment mechanisms for the position of the cylinder head together with compliant piston and compliant cylinder mechanisms can provide near zero dead volume. Different sized opposing cylinders enable the delivery of pumped fluids in precise ratios.

Abstract: A variable delivery liquid pump system includes a housing defining an inlet, an outlet and a plunger bore. A rotating shaft includes a cam that defines a fixed displacement distance with each rotation of the shaft. A plunger is slidably positioned in the plunger bore. A supply of liquid at a supply pressure is attached to the inlet by a supply passage. An output control mechanism includes an electronically-controlled flow restriction valve positioned in the supply passage. The plunger retracts less than the fixed displacement distance of the cam during each rotation of the shaft when the flow restriction valve is at least partially closed. The variable delivery pump is particularly suited for use in a hydraulically-actuated fuel injection system.

Abstract: A pumping unit, consisting of two side-by-side identical pumps (1) linked together, each comprising a star arrangement of pistons (9) which at one end are linked to a shaft (7) with a crank (77), and at the other end comprise respective pumping diaphragms (11) housed in corresponding operating chambers (13), each chamber (13) being provided with an intake valve (130) and a delivery valve (131), comprises a common intake or delivery manifold (3) located between the facing sides of said two pumps, and having a single branch for connection to the supply of fluid to be pumped, or to the device using the pumped fluid, and respective branches for connection to said operating chambers for said diaphragms.

Abstract: A radial piston pump for high-pressure fuel delivery in fuel injection systems of internal combustion engines which includes a common rail injection system. A drive shaft having a number of cam-like projections is supported in a pump housing. A number of pistons disposed radially in cylinder chambers are set into a reciprocating motion in the cylinder chambers upon rotation of the drive shaft. A metallic housing part which constitutes the cylinder chamber is provided with a fuel intake opening and a fuel outlet opening, each of which is controlled by a check valve. The housing part rests with a flat contact surface against a flat contact surface of the metallic housing base body and a projecting section of the housing part, which is concentric to the cylinder chamber extends through a radial opening of the housing base body in the direction toward the drive shaft.

Abstract: The invention relates to a pump device for high-pressure fuel delivery in fuel injection systems of internal combustion engines, in particular in a common rail injection system, including a radial piston pump (2, 68, 80) with a drive shaft (38, 74, 114) that is supported in a pump housing (14) and is embodied eccentrically or has cam-like projections in the circumference direction, preferably with a number of pistons that are each disposed in a cylinder chamber radially in relation to the drive shaft and can be driven to reciprocate in the cylinder chamber when the drive shaft rotates, and with a check valve on the intake side and the high pressure side, and a low pressure pump (4, 71, 82) connected before the radial piston pump; in order to improve the pump device in such a way that it is more compact and can be produced more cheaply and the danger of the occurrence of leaks is reduced, the low pressure pump (4, 71, 82) is provided on or in the pump housing (14) of the radial piston pump (2, 68, 80), on the

Abstract: The invention relates to a piston pump with a piston that is axially displaceable in a pump bore of a pump housing. To enable making the piston pump with a short structure, the piston is embodied with a tubular guide portion, which on its inside is guided axially displaceably on a guide element solidly connected to the housing and protrudes into the guide portion. In this way, an inlet and outlet valve can be integrated with the piston and with the guide element protruding into the guide portion of the piston, as a result of which the piston pump can be embodied with only a slightly greater structural length than the length of the piston.

Abstract: A rotational hydraulic transformer for boosting system pressure of a hydraulic system, which is continuous, compact and has little pulsation, comprises: a first volume increasing/decreasing mechanism Y1 for cyclically and continuously increasing/decreasing the volume of a plurality of first annularly arranged spaces 8, by shifting the phase of each, by means of employing relative positional change of two relative moving members 1 and 3; a second volume increasing/decreasing mechanism Y2 for cyclically and continuously increasing/decreasing the volume of a plurality of second annularly arranged spaces, by shifting the phase of each, the second volume increasing/decreasing mechanism Y2 sharing the two relative moving members 1 and 3, and performing the increasing/decreasing by means of employing relative positional change of the two relative moving members; a pair of first channels A01 and A02, wherein one channel is connected to said first spaces of which the volume is increasing while the other channel is con

Abstract: The present invention discloses a combination of an electric motor and a pump with a compact design. It is important that the pump housing 9 is made of plastic material and slid into the housing periphery 2 of the electric motor so that it embraces the pump housing from the outside and thereby imparts stability to it.The pump bores 15, 16 extend radially outwardly and are closed by plugs 22, 23 which bear against the inside of the electric motor housing 2.Because the pump housing is made of plastic material, it can additionally be used as a brush support plate for the brushes 24, 25 of the electric motor.

Abstract: The invention relates to a high pressure reciprocating pump, for a fuel injection system of an internal combustion engine, having at least one piston, which is displaceably supported in a piston guide provided in a housing and therein defines a work chamber. Supported in the housing is a drive shaft, on which a crank element is provided on which a stroke ring, is not rotatable in the housing. The crank element is rotatably supported, the stroke ring has a slide bearing face, associated with the piston on which face the piston is supported with a slide face, so that the piston can be acted upon by the drive shaft. To reduce the danger of so-called seizing of the bearing faces moving back and forth on one another when poorly lubricating media such as fuel and in particular gasoline are being pumped, it is provided that a relief chamber, formed by a recess in the slide face disposed on the piston and open toward the slide bearing face on the stroke ring, communicates with the work chamber.

Abstract: A radial piston hydrostatic machine having a first fluid displacement stage and a second fluid displacement stage, the machine having an outer housing structure for defining an internal chamber, a drive-shaft supported in the housing and operatively connected to a cylinder-barrel located within the internal chamber, the cylinder-barrel having a number of radial cylinders and each cylinder containing a piston operatively connected to a surrounding annular track-ring, the cylinder-barrel and pistons defining a rotating-group and where the rotating-group is positioned in a sub-chamber generally defined axially by the width of the track-ring and radially by the radial distance between the cylinder-barrel and surrounding track-ring.

Abstract: The present invention relates to a pump, more particularly a radial piston pump, including at least two pump pistons (10) with an associated working chamber (13) each, wherein the working chambers (13) are connected to suction lines (4) by way of suction valve devices (8) and to a joint pressure line (5) by way of pressure valve devices (9), wherein at least one of the suction valve devices (8) opens during the pressure stroke in dependence on the pressure in one of the associated lines (4, 5), and wherein at least one of the suction valve devices (8) opens during the pressure stroke in dependence on the pressure in the pressure line (5).

Abstract: A pump includes a housing defining a cavity, at least one bore, a bore inlet, and a bore outlet. The bore extends from the cavity to the outlet and the inlet communicates with the bore at a position between the cavity and the outlet. A crankshaft is mounted in supports and has an eccentric portion disposed in the cavity. The eccentric portion is coupled to a piston so that rotation of the crankshaft reciprocates the piston in the bore between a discharge position an intake position. The bore may be offset from an axis of rotation to reduce bending of the piston during crankshaft rotation. During assembly of the pump, separate parts of the housing can be connected together to facilitate installation of internal pumping components. Also disclosed is a method of reducing vapor lock by mixing vapor and liquid portions of a substance and introducing the mixture into a piston bore.

Abstract: A hydraulic reciprocating piston machine having a housing, a rotatable cylinder-barrel having a series of cylinders and each cylinder containing a piston which is operatively connected to a reaction member. The reaction member being urged by the forces created from those pistons subject to the pressure phase of the working cycle toward and against an abutment-member. The reaction member is purposefully provided with a limited freedom for movement with the housing, and the action of the pistons forces in urging the reaction member towards the abutment-member provides for a substantial reduction in the normal vibration of the reaction member without binding between the adjacent bearing surfaces.

Abstract: An engine including a crankshaft having a crankshaft pump portion including at least one cam lobe for operably engaging a pump integral to the engine block of the engine, such that the pump is actuated directly by the crankshaft pump portion, thereby eliminating the typical drive train so as to reduce weight of the pump and engine combination while enhancing the reliability thereof and improving pump efficiency.

Abstract: The eccentric end portion (5) of a pump shaft (3) is mounted in a needle roller bearing (6) which comprises a sheet metal bushing (9) and needle rollers (7) guided in a cage (8), wherein the end of the sheet metal bushing (9) remote from the pump shaft (3) is provided with a closed bottom (18) to prevent a displacement of the sheet metal bushing (9) in axial direction.

Abstract: The pump has a number of cylinders arranged with their respective axes at a predetermined angular distance about a drive shaft; and a number of piss, each sliding inside a respective cylinder. The inner radial end of each piston is fitted with a pad engaging a respective flat portion of a cam rotating on an eccentric portion of the drive shaft; and, to ensure against seizure, each pad has a cavity inside which is fitted a shoe having at least one layer of self-lubricating material engaging the respective flat portion of the cam.

Abstract: A fuel pump (10) for supplying fuel to an internal combustion engine employs at least one composite pumping plunger (43) disposed within a plunger bore (46) for reciprocation therein. Each composite plunger comprises at least a high-pressure plunger element (48), which is in contact with a high-pressure fuel charge to be delivered by the pump, and an abutting leak-off plunger element (47) disposed between the high-pressure element and a plunger actuating member (50, 52). The plunger elements of each composite plunger are stacked in the direction of reciprocation such that the abutting plunger elements form confronting end faces. The confronting end face of at least one of the elements in each composite plunger is contoured and the confronting end face of the abutting element is non-complementary in shape.

Abstract: A pump for providing a pressurized fluid flow. The pump includes a pump casing that defines a pump chamber. A pump shaft is has a head end in the pump chamber; the head end has a circumferential outer surface. The pump shaft head end has inwardly extending piston chambers. A discharge manifold is formed in the pump shaft head end. The discharge manifold has one end in fluid communication with the piston chambers and a second end in fluid communication with a discharge conduit that extends outside of the pump casing. A piston is mounted in each piston chamber. The pistons are formed with flow-through bores that provide fluid communication between the pump chamber and the piston chambers. A suction valve associated with each piston regulates fluid flow from the pump chamber through the flow-through bore into the associated piston chamber. Discharge valves regulate fluid flow from each piston chamber into the discharge manifold.

Abstract: A hydraulic motor with propulsion members located between an eccentric cam associated with a shaft and a counter-element. The propulsion members consist of two elements slidable telescopically with respect to one another in the longitudinal direction and having annular bearing shoulders kept pressed against corresponding sliding-contact surfaces of the eccentric cam and the counter-element by springs. The resilient springs are located outside the propulsion members and are arranged between the annular edges and elements for mechanically retaining them.

Abstract: Fuel pump for delivering high pressure fuel to a fuel injection system of an internal combustion engine is provided. The fuel pump has a body, a drive shaft rotatably mounted in the body, at least one cam on the drive shaft, a plurality of pumping plungers mounted in the body for movement in the radial direction relative to the axis of rotation of the drive shaft, a pumping chamber defined radially outwardly of each plunger, and a delivery valve associated with each pumping chamber. Each pumping plunger is mounted in a support member which provides sliding support for its associated plunger in the circumferential direction of the drive shaft over substantially the entire length of the plunger in all working positions thereof. Each plunger is coupled to at least one cam by a pin which is secured to the plunger and extends outwardly from the plunger through a slot which extends through the support member in the axial direction of the drive shaft.

Abstract: An adjustable rotor and/or a radial piston machine which may utilize an adjustable rotor. The rotor has a primary eccentric rotatable around an axis and a secondary eccentric adjustable in position relative to the primary eccentric. The radial piston machine includes a plurality of piston cartridges arranged radially around the axis and both high pressure and low pressure fluid distribution systems. Multiple units may be axially coupled. A single unit may handle a variety of fluids in various combinations.

Abstract: The device relates to a piston pump, in particular a high pressure pump for a fuel injection device of an internal combustion engine, with at least one piston that is supported so that the piston can slide in a piston guide provided in a housing. A drive shaft is supported in the housing (10) on which drive shaft a crank element is provided. A stroke ring is supported in rotary fashion on the crank element and the piston can be acted upon by the drive shaft by way of this stroke ring. In order to prevent high lateral forces on the piston, the piston is supported on the non-rotating stroke ring with a sliding surface disposed on it against an associated slide bearing surface, wherein lubrication grooves are let into the slide bearing surface, crosswise to the relative motion between the piston and the stroke ring.

Abstract: A pump for conveying a medium, especially a gas-liquid mixture, with a housing, an annular surface extending inside the housing, an eccentric arranged off center in relation to the annular surface and at least one displacer arranged between the annular surface and the eccentric. The displacer is held in position in relation to the annular surface and the annular surface can rotate in relation to the eccentric. A hollow shaft delivers mixture to the eccentric which has connections to the displacer for delivering mixture to and receiving it from the displacer.

Abstract: The invention is based on a reciprocating piston pump having two radial pistons disposed symmetrically to one another, which are drivable to a reciprocating motion by an eccentric disposed between them and are held in contact with the eccentric by a hoop spring that engages the pistons. For ease of installation, the invention proposes embodying the hoop spring as a bent wire part, with two open, hooklike eyelets on their ends, which ends are inserted into annular grooves of the pistons and enter into a snap connection with them in order to hold the pistons tightly against the eccentric.

Abstract: Disclosed is a self-sealing valve and cylinder configuration, an internal combustion rotary engine, or pump or compressor, with a rotating central housing which includes at least one cylinder aperture, a non-rotating timing pulley mount concentrically positioned within the central housing, a crank shaft eccentrically mounted within the central housing, a valve housing attached to the central housing and which retains a cylinder between it and the central housing, a piston within each cylinder, the piston rod is eccentrically mounted to the crank shaft, and a rotating valve within each valve housing.

Abstract: A high pressure pump for a fuel injection device of an internal combustion engine, having a housing, which has an inflow region and a delivery region, having at least one piston, and having a drive element which act upon the piston. The piston is movably disposed in a piston guide of a pump cylinder element and establishes a work chamber in the piston guide which is operatively provided between the inflow region and the delivery region, which chamber, depending upon the movement direction of the piston, can alternatingly communicate with the inflow region and the delivery region. In order to reduce the assembly and handling expenditure for the assembly and to thus cut corresponding assembly costs, it is provided that the pump cylinder element together with a valve which is provided between the work chamber and the delivery region, is fixed in a retaining element which is fastened to the housing.

Abstract: A cooperating rotor device having a first rotor supported for rotation about a first rotation axis (R1) and a second rotor supported for rotation about a second rotation axis (R2). A cylinder rotor (32), supporting a plurality of radially aligned cylinders (33) spaced apart and supported for collective rotation about one rotation axis (R1). Each cylinder (33) having a piston (39) slidable within. A piston rotor (61) has a number of piston rollers (64) corresponding to the number of cylinders (33), each radially supporting a piston (39), with each piston roller (64) independently rotatably supported and all piston rollers (64) collectively rotatable about the other rotation axis (R2). Members including the piston rollers (64), pistons (39), cylinders (33), and cylinder ports (34), all sharing a common plane of rotation about diametrically opposed non-rotating valve ports (74a) and (74b).

Abstract: A hydraulic pump includes a pump housing block, a rotary drive shaft and plural pumping assemblies extending radially from the rotary drive shaft. Each pumping assembly includes a reciprocating piston, a cylinder lining, and a piston return spring mounted between the piston and the lining. The cylinder linings are inserted into the pump block from the outside and a detachable latching device secures the linings to the block. The cylinder lining, the piston and the piston return spring can be easily removed and replaced after the latching device, for instance a locking ring, has been removed.

Abstract: A radial piston hydrostatic machine having an outer housing structure and defining an internal chamber, a drive-shaft supported in the housing and operatively connected to the cylinder-barrel, the cylinder-barrel having a number of radial cylinders, each cylinder containing a piston such that the pistons bear on the track-ring, the track-ring eccentrically position within the internal chamber by means of fixed abutment means in the housing, the abutment means disposed radially adjacent the track-ring for resisting the action of the pistons on the track-ring and thereby suppressing vibration emanating from the track-ring.

Abstract: A multistage compressor has a yoke with a cross slider and roller bearings pressed against the sides of the cross slider by spring forces to enable the cross slider to slide smoothly within the yoke. The spring forces are generated by springs disposed between the yoke and a liner plate that urges the roller bearings against the cross slider. By this construction, the yoke and cross slider are not damaged during operation of the compressor even if the dimensions of the members change due to thermal expansion.

Abstract: The present invention relates to an eccentric arrangement for a reciprocating piston pump, having a drive shaft drivable by a drive device, an eccentric part of a rubber-elastically deformable material is disposed on the drive shaft in a manner fixed against relative rotation. A bearing ring is provided on an outer circumferential surface of the eccentric part, by which ring a reciprocating piston is displaceable driven substantially perpendicular to the drive shaft. To avoid stroke losses, first and second support faces are provided on the drive shaft which the eccentric part disposed between them in such a way that the eccentric part rests with its axial ends on the first and second support faces.

Abstract: A reduced noise radial piston pump with a driving motor for a controlled brake system. The noise reduction is primarily accomplished by locating and orienting the motor/pump bearings with respect to the pump pistons.

Abstract: A piston pump for the delivery of hydraulic fluid, in particular for ABS braking systems, comprises a pump housing 10 with an inlet 12 and an outlet 14 for the hydraulic fluid. A piston 16 is guided in the pump housing 10 without a sliding sleeve and supplies hydraulic fluid from the inlet 12 to the outlet 14 of the housing 10. A valve assembly 20 together with the piston 16 and a return spring 34 for the piston is joined as an asseembly capable of being handled independently and arranged directly in the pump housing 10.

Abstract: An efficient, cost effective eccentric bearing assembly is provided for use in a multiple piston hydraulic pump. The eccentric bearing assembly includes a roller bearing having an annular race. The race includes a groove around its outside perimeter. The groove engagably receives parti-spherical faces of a pair of opposed pistons. The parti-spherical face evenly loads the race and rollers as the race reciprocates with the eccentric. The invention avoids the use of rotating thrust bearings and instead axially supports the piston clip with stationary surfaces. Placement of the parti-spherical face or an optional conical face, at the interface between the pistons and the grooved race maintains the sliding contact point for piston intake strokes near the center of the face.

Abstract: A central impeller is sandwiched between fixed walls and is driven through a circular path of small radius, but prevented from rotating by a ring-shaped shutter or slider which surrounds and guides it. The shape of the impeller and slider are such that displacement chambers are formed between them, which expand and contract as the impeller follows a circular path and imparts a reciprocating motion to the slider. The two fixed walls contain suction and discharge ports which are covered and uncovered by the impeller and the slider as they perform their motions.

Abstract: A plurality of plungers situated radially in a pump body, are sequentially actuated inwardly by a rotatably driven, eccentrically mounted actuating ring. A central valve housing is coaxially received within the body and includes a fuel inlet chamber and a fuel discharge chamber, which are closely axially aligned. The pump body closely engages the valve housing such that radially extending bores in the body and a portion of the valve housing between the inlet and discharge chambers, together define the pumping chambers. All pumping chambers are connected via short passages in the valve housing, to the common inlet chamber and the common outlet chamber. This configuration, by which all fuel passages and associated valves subject to the pumping pressure are within the central valve housing, not only minimizes the dead volume, but keeps all fuel flows confined within a radius that is smaller than the actuator ring sliding radius, i.e.