Abstract: A vane cell pump, including: a rotor and a plurality of vanes rotatable with the rotor, wherein the rotor includes a sub-vane chamber for each vane, and each vane forms a shifting wall of the sub-vane chamber assigned to it; first and second end-facing walls adjoining the rotor on end-facing sides and which, in order to control pressure to the sub-vane chamber, include sub-vane cavities which extend in the circumferential direction of the rotor and include control edges as viewed in the circumferential direction; wherein the control edge of the sub-vane cavity of the first end-facing wall, and the control edge of the sub-vane cavity of the second end-facing wall which is similar to it, are arranged angularly offset about the rotational axis as the apex with respect to each other.

Abstract: An oil pump includes: a first core in which an inner rotor having external teeth and an outer rotor having internal teeth are housed; a housing having a recess in which the first core is held; a second core disposed in contact with the first core in an axial direction; and a cover having a holding hole in which the second core is held. The first core has a first recess/projection portion formed on a first axial end surface at a side opposite to an axial end surface opposing a bottom wall of the recess. The second core has a second recess/projection portion formed on a second axial end surface that is in contact with the first axial end surface. A gap is formed between opposing surfaces of the housing and the cover in a state where the first and second axial end surfaces are in contact with each other.

Abstract: A dual-section gear pump that enhances compactness of the design includes two pump sections separated by a divider. Each pump section includes a pump cavity and a gear set configured to convey fluid from an intake side to a discharge side of the respective pump cavities. The divider includes a fluid flow passage that enables the two pump sections to share common intake flow via the flow passage provided across the divider. The divider also is configured to enable each gear set in each pump section to provide independent pressurization of the fluid in each pump section, which is discharged from each pump cavity via separate outlets. The gear pump is configured to provide suitable sealing between each pump section and support of the respective gear sets in each pump section while enhancing compactness of the design.

Abstract: A fluid pump includes a stator. A rotor is rotationally operable with respect to the stator. A drive shaft extends from the rotor to a pump assembly that delivers a fluid from an inlet to an outlet. A pump housing includes an interior cavity that contains the stator, the rotor and the pump assembly. A pump cover is disposed at an end of the pump housing. The pump cover defines an end of the interior cavity. A spring assembly biases the pump cover in an axial direction toward the pump assembly.

Abstract: A cartridge vane pump includes a rotor, a plurality of vanes, a cam ring, a side member brought into contact with a first end surface of the cam ring, a cover member brought into contact with a second end surface of the cam ring, the cover member being attached to the body, and a linkage member provided to extend between the side member and the cover member over an outer circumferential surface of the cam ring, the linkage member being configured to link the side member and the cover member.

Abstract: A pump apparatus includes a housing, a shaft, a rotor, a plurality of vanes, a pressure relief passage, and a bearing. The housing includes suction ports and discharge ports. The rotor and the vanes transport hydraulic oil to the discharge ports. The hydraulic oil is sucked from the suction ports. The pressure relief passage is defined in a portion of the housing facing an outer peripheral surface of the shaft. The pressure relief passage brings the discharge ports into communication with a low pressure region where the hydraulic oil is low in pressure. When a pressure of the hydraulic oil in the discharge ports is lower than a first predetermined pressure, the bearing keeps the pressure relief passage out of communication with a passage. When the pressure of the hydraulic oil in the discharge ports has increased to reach or exceed the first predetermined pressure, the bearing brings the pressure relief passage into communication with the passage.

Abstract: A pump assembly comprising a housing, a support frame that can be attached to the housing, and a rotor that can rotate within the housing. The housing consists of resilient material and comprises an interior surface, an inlet portion including an inlet for fluid, an outlet portion including an outlet for the fluid, and a diaphragm portion. A housing-engaging surface area of the rotor will form a sealing interference contact with the interior surface, and a chamber-forming surface area of the rotor disposed radially inward from the housing-engaging surface area will form a chamber with the interior surface. When the rotor rotates within the housing as in use, the chamber can convey fluid from the inlet portion to the outlet portion. The diaphragm portion will bear against the chamber-forming surface as the chamber-forming surface travels from the outlet to the inlet, to prevent fluid passing from the outlet to the inlet and to expel the fluid from the chamber through the outlet portion.

Abstract: In a vane pump, a communication groove that provides communication between a communication hole and a discharge port is formed in an outer side face of a rear housing. An opening of the communication groove is blocked by a fitting face of a control valve case. A back-pressure introduction passage that provides communication between the communication hole and an outlet is formed by the communication groove and the fitting face of the control valve case. The back-pressure introduction passage is formed between the rear housing and the control valve case, that is, on the outer side of the housing.

Abstract: A rotary directional pressure engine having a case within which a plurality of rotors rotate in parallel. The rotors include asymmetrical cavities on the circumferential faces thereof, which cavities function to move air and/or other gases into a combustion chamber area during an intake phase, to cooperatively form a combustion chamber during an ignition and combustion phase, and to move exhaust gases to the area of one or more exhaust ports for removal from the engine during an exhaust phase. Continued rotation of the rotors is accomplished by harnessing and properly directing the forces of combustion against the asymmetrical cavities of the rotors.

Abstract: A gear pump includes a drive gear mounted to a first gear shaft, a driven gear meshable with the drive gear, a plurality of journal bearings, and a first porting path. The first porting path is adapted to provide high pressure fluid communication from a discharge of the gear pump to a first hybrid pad location for a first journal bearing selected from the plurality of journal bearings, the first hybrid pad location circumferentially adjacent to a first fluid film location. Each location is disposed annularly between an inner surface of the first journal bearing, and an outer surface of the first gear shaft or second gear shaft corresponding to the first journal bearing.

Abstract: A liquid gear pump includes a gear pump assembly and an electric motor with an motor shaft. The gear pump assembly includes a pump housing which defines a pump chamber, an inlet and an outlet which are in fluid communication with the pump chamber, and a driving gear and an idle gear which are received in the pump chamber. The driving gear is driven by the motor shaft. The idle gear is supported on an idle shaft and engaged with the driving gear. The driving gear and the idle gear are made of a material with a main component of PPS.

Abstract: In order to highly precisely adjust a gap between a bearing and a gear rotor by a simple configuration, a gear pump of the present invention includes: a casing that includes an inlet and an outlet; a pair of gear rotors each of which is formed by integrating a gear portion with a shaft portion and which is disposed so as to engage with each other inside the casing; a bearing portion that supports the shaft portion so that the gear rotor is rotatable, the bearing portion being movable in the thrust direction of the gear rotor; and a gap adjustment unit that moves the bearing portion in the thrust direction so as to adjust a gap between the gear rotor and the bearing portion.

Abstract: One embodiment includes a gear pump with a drive gear, a gear shaft passing through the drive gear, and a stationary journal bearing. Also included is a fluid film location annularly between a surface of the stationary journal bearing and a surface of the gear shaft, and a hybrid pad location on the stationary journal bearing adjacent the fluid film location. The hybrid pad has a minimum leading edge angular location on the stationary journal bearing of 31.0° and a maximum trailing edge angular location on the stationary journal bearing of 43.0°. The gear pump also includes a porting path for supplying high pressure fluid from a discharge of the gear pump to the fluid film at the hybrid pad.

Abstract: A hydraulic pressure supply system of an automatic transmission may generate low hydraulic pressure and high hydraulic pressure using oil stored in an oil pan and may supply the low hydraulic pressure and the high hydraulic pressure respectively to a low pressure portion and a high pressure portion. In the hydraulic pressure supply system, a low-pressure hydraulic pump pumping the oil stored in the oil pan and generating the low hydraulic pressure and a high-pressure hydraulic pump changing the low hydraulic pressure supplied from the low-pressure hydraulic pump into the high hydraulic pressure and supplying the high hydraulic pressure to the high pressure portion may be integrated as one hydraulic pump.

Abstract: A rotating pumping apparatus is provided which may be employed in an automotive brake system. The rotating pumping apparatus includes a sealing member and a pressure member. The sealing member is disposed around a pump drive shaft. The pressure member includes a plate spring, a first rotation stopper, and a second rotation stopper. The first rotation stopper serves to stop the pressure member from rotating following rotation of the pump drive shaft. The second rotation stopper engages the seal ring to stop the sealing member from rotating following the rotation of the pump drive shaft. The plate spring works to elastically press the sealing member against a stopper wall of a pump casing to stop the sealing member from moving in an axial direction of the pump drive shaft.

Abstract: A pump unit of a vane-type pump having no dedicated housing including a drive shaft, a rotor that interacts with the drive shaft and accommodates vanes, a contour ring surrounding the rotor, and a first and a second side plate which are disposed laterally of the contour ring.

Abstract: A pump has a suction region, a pressure region, and a pressure space which has an outflow region. A rotor is connected to a shaft in which rotor delivery elements are displacably received. The rotor has expelling regions connected to the pressure region by way of a first fluid path. A cold starting device is prestressed into a first functional position to shutoff a second fluid path from the pressure region to the pressure space, and is configured to be displaced counter to the prestress into a second functional position to open the second fluid path. The cold starting device is arranged in its second functional position at least in regions with a relief face which faces away from the pressure region in a relief receptacle. The relief face is loaded during operation of the pump with a pressure being smaller than a system pressure in the outflow region.

Abstract: A self-adjusting gear pump is disclosed. The pump may be a crescent internal gear pump, a gerotor pump, or an external gear pump. The pump includes a pump housing, gear housing, first and second gears, a side plate housing with a side plate, a shim and an end plate. The side plate moves between a first position contacting the first and second gears and gear housing, and a second position contacting the end plate. The side plate is spring biased toward the first position. A method is disclosed for match grinding the crescent plate (if used), gear housing and gears as a unit to provide a uniform surface. The side plate housing and side plate are similarly match ground. An assembly method is disclosed which allows the crescent plate to be moved with respect to the gear housing so that clearances between the crescent and the gear teeth are eliminated.

Abstract: A pump, particularly a vane-type pump, including a rotor guiding at least one vane and resting against at least one pressure plate, which has at least one pressure through-hole and at least one under-vane through-hole, the holes being connected to a pressure outlet provided in a housing of the pump or in a transmission housing. In between the pressure plate and the housing a flow guide device is arranged, which delimits a fluid path from the pressure through-hole past the under-vane through-hole to the pressure outlet.

Abstract: A pump having an actuator mounted on a rotatable shaft, and a pump mounted on the shaft, which is selectively engageable with the actuator. When the actuator is actuated, the pump will receive rotational force from the shaft, creating a pumping. action.

Abstract: A pump, particularly a vane-type pump, including a rotor guiding at least one vane and resting against at least one pressure plate, which has at least one pressure through-hole and at least one under-vane through-hole, the holes being connected to a pressure outlet provided in a housing of the pump or in a transmission housing. In between the pressure plate and the housing a flow guide device is arranged, which delimits a fluid path from the pressure through-hole past the under-vane through-hole to the pressure outlet.

Abstract: A pump unit of a vane-type pump having no dedicated housing including a drive shaft, a rotor that interacts with the drive shaft and accommodates vanes, a contour ring surrounding the rotor, and a first and a second side plate which are disposed laterally of the contour ring.

Abstract: A pump assembly includes a pump housing, a stator ring supported within the pump housing, and a pump ring also rotatably supported within the pump housing. The pump ring interfaces with the stator ring to define a plurality of variable volume pressure chambers. A cover plate covers the stator ring and pumping ring within the pump housing. The cover plate is axially displaceable relative to the pump housing and defines a wall of each of the pressure chambers. Pressure within the pressure chambers induces linear movement of the cover plate away from the stator ring and the pump ring.

Abstract: A pump assembly includes a pump housing, a stator ring supported within the pump housing, and a pump ring also rotatably supported within the pump housing. The pump ring interfaces with the stator ring to define a plurality of variable volume pressure chambers. A cover plate covers the stator ring and pumping ring within the pump housing. The cover plate is axially displaceable relative to the pump housing and defines a wall of each of the pressure chambers. Pressure within the pressure chambers induces linear movement of the cover plate away from the stator ring and the pump ring.

Abstract: In a rotary pump in which axial end surfaces of outer and inner rotors is in pressurized direct contact with an axial end surface of a second side plate to form a mechanical sealing, both of the axial end surfaces of the outer and inner rotors and the axial end surface of the second side plate are provided with radial line grinding stripes. Teeth gap portions formed by the outer and inner rotors in mesh communicate with an outer circumference gap between the circumference of the outer rotor and inner circumference of a center plate and also with a shaft hole of the inner rotor through extremely slight gaps formed by concave and convex of the radial line grinding stripes so that contact surface between the outer and inner rotors and the second side plate is well lubricated to reduce torque loss.

Abstract: A rotary vane device for hydraulic transmission of mechanical energy with industrial scale measures of power and rotational velocity. The device offers high measures of both volumetric efficiency and rotational velocity and hence substantial measures of functional excellence in terms of power density and functional efficiency. Additionally the device functions without the use of reciprocating primary components and for this reason potentially offers substantial measures of excellence in terms of enhanced operational reliability and relatively low measures of radiated mechanical noise and vibration.

Abstract: An improved high pressure intermeshing gear pump that achieves high efficiency and a low cost by forming the pumping cavity such that no fillets exist at the corners permitting closed fits without utilizing bearing end plates. In addition an improved coupling between the gears and their supporting shafts is disclosed as is a simplified machining method that eliminates burrs that may be formed during the drilling operations.

Abstract: A gerotor pump is provided that includes a pump housing having a pump cover and a pump end plate. The pump cover defines an open end, an axial bore, and a bottom end. The pump end plate engages the open end of the pump cover thereby enclosing the axial bore of the pump cover and creating an inner cylindrical chamber in the pump housing. A wear plate and a gerotor gear set assembly are operatively disposed within the inner cylindrical chamber such that the gerotor gear set assembly is operatively disposed between the wear plate and the pump end plate. A biasing member is disposed between the bottom end of the pump cover and the wear plate, and is adapted to operatively bias the wear plate against the gerotor gear set assembly and the pump end to create an axial zero tolerance condition between the pump elements.

Abstract: A vane pump including a rotating group comprising a thrust plate and a pressure plate which cooperate with a cam ring, rotor and vanes to provide a plurality of pump chambers. The thrust plate includes a pair of thrust plate passageways. Each thrust plate passageway comprises a pair of kidney shaped passages. The first kidney shaped passage is radially aligned with the discharge port of the thrust plate. The second kidney shaped passage is radially aligned with the inlet port of the thrust plate. The first and second kidney shaped passages are connected with a metering groove. Each thrust plate passage is isolated or blocked from the next adjacent thrust plate passage in the low-to-high pressure transition area of the thrust plate.

Abstract: A pump is proposed, in particular a vane pump, for a liquid or gaseous medium, which can be driven with the help of a motor, in particular an electric motor, and which comprises a rotor (15) that can be coupled to a drive shaft (29) of the motor and is arranged in an operating chamber and at least one pressure plate (25) that closes the operating chamber (11) in the axial direction and on its lateral face (27) facing away from the rotor (15) is connected to a pressure chamber (23), and also a coupling element (47; 47′) which surrounds part of the drive shaft (29), cooperates with at least one seal and contributes to sealing off the pressure chamber (23) with respect to the motor, the drive shaft (29) extending through a through opening (35) in the pressure plate (25). The pump (1) is characterized in that the coupling element (47; 47′) has a sleeve-like section (49) which engages in the through opening (35) in the pressure plate (25).

Abstract: A radial vane type machine intended for production of compressed gaseous and vaporous fluids with industrial scale measures of compression amplification and throughput. Fluid compression is accomplished by mechanical volume manipulation but without the use of reciprocating pistons and/or intermittently operating mechanical valves. The machine incorporates features for thermal control necessary for high performance single stage pressure amplification, and features for minimization of mechanical friction necessary to ensure functional viability. The physical and input power characteristics of the machine are compatible with the physical and output power characteristics of modern, commercially available internal combustion and electrical power sources. Compared with reciprocating piston type fluid compressors the machine potentially offers substantial measures of excellence in terms of vibration-free operation, functional efficiency, reliability, and power density relative to both space and weight criteria.

Abstract: A vane pump comprising a pump housing, including an inlet, an outlet, and therein a hollow space, a cam ring received in the hollow space, a rotor placed in the cam ring and defining a rotation axis. The rotor comprises plural vanes arranged in corresponding slots formed in the rotor with a slidable contact in a radial direction of the rotor. A first wall member is received in the hollow space, one side of the first wall member faces one side of the cam ring, and the first wall member comprises an intake passage provided with a groove that is formed so that a partition wall portion is defined between the intake passage and an interface between the first wall member and the cam ring. A pair of intake ports are formed on the one side of the first wall member, each intake port is connected with the inlet by the intake passage, and a pair of outlet ports are formed on the one side of the first wall member.

Abstract: A gerotor pump is provided that includes a pump housing having a pump cover and a pump end plate. The pump cover defines an open end, an axial bore, and a bottom end. The pump end plate engages the open end of the pump cover thereby enclosing the axial bore of the pump cover and creating an inner cylindrical chamber in the pump housing. A wear plate and a gerotor gear set assembly are operatively disposed within the inner cylindrical chamber such that the gerotor gear set assembly is operatively disposed between the wear plate and the pump end plate. A biasing member is disposed between the bottom end of the pump cover and the wear plate, and is adapted to operatively bias the wear plate against the gerotor gear set assembly and the pump end to create an axial zero tolerance condition between the pump elements.

Abstract: The geared feed pump has a housing, in which a pump chamber is formed between a housing part and a cap part, and a pair of gear wheels, driven to rotate and meshing with one another on their outer circumference, are disposed in the pump chamber and pump a feed medium into a pressure chamber along feed conduits formed between the outer circumference of the gear wheels and circumferential walls of the pump chamber. On its inside toward the face ends of the gear wheels, the cap part has an indentation with a cross section that is at least as large as the cross section of the face ends of the gear wheels. Between the cap part and the face ends of the gear wheels, a platelike cover element covering the indentation is disposed; at least when the geared feed pump is not in operation, the cover element rests with initial tension on the face ends of the gear wheels and can be deflected into the indentation, away from the face ends of the gear wheels.

Abstract: A vane pump comprising a pump housing, including an inlet, an outlet, and therein a hollow space, a cam ring received in the hollow space, a rotor placed in the cam ring and defining a rotation axis. The rotor comprises plural vanes arranged in corresponding slots formed in the rotor with a slidable contact in a radial direction of the rotor. A first wall member is received in the hollow space, one side of the first wall member faces one side of the cam ring, and the first wall member comprises an intake passage provided with a groove that is formed so that a partition wall portion is defined between the intake passage and an interface between the first wall member and the cam ring. A pair of intake ports are formed on the one side of the first wall member, each intake port is connected with the inlet by the intake passage, and a pair of outlet ports are formed on the one side of the first wall member.

Abstract: The geared feed pump has a housing, in which a pump chamber is formed between a housing part and a cap part, and a pair of gear wheels, driven to rotate and meshing with one another on their outer circumference, are disposed in the pump chamber and pump a feed medium into a pressure chamber along feed conduits formed between the outer circumference of the gear wheels and circumferential walls of the pump chamber. On its inside toward the face ends of the gear wheels, the cap part has an indentation with a cross section that is at least as large as the cross section of the face ends of the gear wheels. Between the cap part and the face ends of the gear wheels, a platelike cover element covering the indentation is disposed; at least when the geared feed pump is not in operation, the cover element rests with initial tension on the face ends of the gear wheels and can be deflected into the indentation, away from the face ends of the gear wheels.

Abstract: A multistage pump includes a shaft assembly and a housing and spacing plates. The shaft assembly completed by forming shafts and rotors integrally. The spacing plates defining a plurality of successive compression chambers, each chamber is delimited by two symmetrical spacing plates, there has a ring groove associated with the spacing plates, and having an elastic component placed. When the elastic component pressed by the housing, it became leakage and the clearance between the rotors and the spacing plates be easily controlled, by this way, the pump using parts are easy to manufacture, can be machined accurately and which enable highly accurate assembly to be achieved. As to the assembling method, which is characterized by mounting the high pressure end axial bearing seat and the high pressured end plate, then to control the clearance between the high pressure end plate of the bearing seat and the rotors. Furthermore, to install the spacing plates and the housing make the compression chamber formed.

Abstract: The invention provides a rotary-vane machine having a stationary shell including a casing member (2), a camming ring (4) having an internal, noncircular camming surface (6), and a flange member (8); a rotor (10) including at least two first vanes (12) fixedly attached to, or integral with, the rotor (10), a first cover plate (14) fixedly attachable to the rotor (10); a second cover plate (16) fixedly attachable to the rotor and integral with a first shaft (22) supported on its free end by bearing (26) mounted in the casing (2), and being provided with at least four ports (a) for access or egress of a working medium; a second shaft (23) supported by a first bearing (28) accommodated in the first cover plate (14) and by a second bearing (30) accommodated in the second cover plate (16); at least two second vanes (38) fixedly attached to the second shaft (23) and oscillatably accommodated within the rotor (10), and defining, together with the rotor (10), the first vanes (12) and the first and second cover plates

Abstract: A gerotor motor of the type having an end cap (13), and a stationary valve plate (15) disposed adjacent a rearward surface of the gerotor gear set (17). Adjacent a forward surface of the gerotor star (27) is a balancing plate assembly (19) including a radially outer balance plate (73) and a radially inner balance plate (75), the balance plates defining inner (77) and outer (79) profiles, respectively, which are closely spaced apart and are radially inward from the gerotor volume chambers (29) to provide sufficient sealing land. The inner balance plate (75) is biased toward the star end surface (81) by a Belleville washer (87). The end surface (81) of the gerotor star (27) defines individual star tooth surfaces (97), each of which includes a radial fluid passage (99) receiving system pressure, and a fluid passage (101) oriented generally perpendicular to the radial passage, and having a decreasing flow volume in a direction away from the radial passage (99).

Abstract: A rotational mechanism which consists of a circular armature fitted with a plurality of radial vanes which rotates within a stationary, cylindrical, containment structure with a circular bore. The rotational armature is concentrically installed on a rotational shaft which passes through the axial ends of the containment structure and which is supported by low friction rotational bearings such as to rotate on an axis which is parallel to, but radially separated from, the axis of the containment cylinder. The axial ends of the shaft provide the interface with external mechanically dynamic systems. The armature is a hollow cylinder which incorporates a plurality of uniformly distributed radial slots each of which extends through the annulus. The axial slots are each sized such as to provide annular support for a radial vane but allow relative sliding movement of the vane in axial and radial directions.

Abstract: A hydrostatic transmission and a charge pump for supplying operating oil which are housed in a housing, in which a pump casing of the charge pump is mounted to a center section of the hydrostatic transmission without using mounting bolts. A spring is interposed between the pump casing and the inner surface of the housing. For defining pump discharge pressure, the center section receives all of the radial force generated in the pump casing. Between the center section and the charge pump is interposed a plate of material made of less friction resistance so as to reduce the sliding resistance. The charge pump is simple in construction and inexpensive to produce.

Abstract: A pump, particularly a vane or roller pump, with at least two pump segments, each having a suction region and a pressure region, with a first fluid path leading from the pressure side to a consumer, and with at least one hydraulic resistance element, which is arranged in the first fluid path to the consumer, is proposed. The pump is characterized in that the hydraulic resistance element is arranged in a second fluid path connecting the pressure regions of the at least two pump segments.

Abstract: An adjustable one-way rotary liquid pumping device including a housing, a cover fixedly engaged with the housing, a first bearing a first bearing fitted in the housing, a second bearing fitted in the cover, an axle extending through the housing and the cover and supported by the two bearings, a rotor fixedly mounted on the axle and having a plurality of pawls, a collar enclosing the rotor, a seat having two protuberances supporting the collar thereby locating the collar at an eccentric position with respect to the axle, a plurality of rollers each fitted between every two of the pawls of the rotor, a plurality of springs urging respective rollers against an inner wall of the housing and an inclined side of the pawls, and an adjustable valve fitted through the housing, the collar, and the seat, whereby the liquid can be pumped in one direction only and the speed of the axle can be adjusted as required.

Abstract: A floating bearing having an oval body located in a cavity along with a fixed bearing retains a pair of intermeshing gear members in the cavity in a housing of a pump. A spacer member engages an axial rib on the oval body to form a control chamber between the spacer member and the oval body. A resilient member provides an initial force which urges the floating bearing into engagement with the pair of intermeshing gears and forms a gap between the spacer and the oval body. Entrance fluid pressure from an entrance chamber is communicated to the control chamber while discharge fluid pressure from a discharge chamber is communicated to the gap. The entrance and discharge fluid pressures act on the floating bearing to provides a secondary force which urges the floating bearing into engagement with the pair of intermeshing gears to seal the entrance chamber from the discharge chamber.

Abstract: A housing for a pump having a cavity therein formed by first and second side walls connected to first and second semicircular end walls. A pair of intermeshing gear members are journaled in a floating bearing and a fixed bearing are located in the cavity. The intermeshing gear members respond to a clockwise rotary torque to pressurize fluid in transporting a fluid from an entrance chamber to a discharge chamber. The fluid in the discharge chamber acts on and urges the floating bearing and fixed bearing into engagement with portions of the first and second semicircular end walls and first side wall to seal the entrance chamber from the discharge chamber. The intermeshing gear members respond to a counterclockwise torque by transporting fluid from the discharge chamber to the entrance chamber to develop an internal fluid pressure. The internal fluid pressure acts on and urges the floating and fixed bearings toward the first and second semicircular end walls and second side wall.

Abstract: The invention relates to a gear pump for oil for an internal-combustion engine, in particular for motor vehicles, comprising a pump housing mounted on the motor and an outer rotor which is arranged in the pump housing, an inner rotor additionally being arranged within the outer rotor or within the pump housing and at least one suction and/or at least one pressure passage being provided in the pump housing, a drive further being present; the pump according to the invention is integrated in a drive wheel or guide pulley of the internal-combustion engine and the outer rotor or the outer rotors are driven by the drive wheel or the guide pulley.

Abstract: A positive displacement device is presented. The mechanism comprises a nutator capable of nutating within a nutating chamber defined by the interior surface of the body of the positive displacement device between an inlet into and an outlet out of the positive displacement device, an inverted pendulous, low friction, substantially non-sliding nutator, vertically elongated double pivoting fulcrum; a magnetic signal pickup mechanism comprising a pivoting cruciform shaped magnet element low inertia wire magnetically tracking a nutator and a means of sensing movement; a third magnetic element to dampen or amplify movement of the cruciform wire; a balance plate bearing on the basic elements of the positive displacement device by means of a resilient spring force; and static elements which provide magnetic attraction to the moving elements effecting a sealing influence between the static and moving elements.

Abstract: The balanced vane hydraulic pump designed for automotive power steering applications employs a two-piece aluminum housing construction, a cam ring, rotor flow regulating valve, a high pressure gallery, and a pressure plate, all located in the rear housing section, and a set of needle bearings located in the front housing section for supporting the pump drive shaft from one end only. The pressure plate has a sculpted portion which communicates with the cam ring side of the pressure plate. The sculpted portion is a wishbone-shaped gallery and a low pressure area, recessed within the face of the pressure plate. The pressure plate also includes high pressure windows which deliver high pressure fluid from the cartridge to the high pressure gallery located within the rear portion of the pump housing.

Abstract: A gear pump for use in a metered liquid dispensing system utilizes a pair of carbon graphite wear plates to increase pump vacuum or suction lift capabilities. The wear plates are disposed on opposite sides of the pump spur gears and are biased against the sides of the gears to reduce internal pump clearances. The biasing force is provided by a resilient O-ring positioned between a surface of the pump housing and one of the wear plates. The gears are mounted for limited movement so the urging of the one wear plate is transferred through the gears to the other wear plate. The gear pump is driven through a gear reducer unit by a reversible electric motor. The use of a gear pump assures accurate metering of the amount of fluid delivered by the system.

Abstract: A liquid dispensing system utilizes a microprocessor based electronic control and a positive displacement gear pump to accurately meter predetermined batches of liquid pumped from a supply tank. The gear pump is driven by a reversible motor through a gear reducer, and is operative to pump a predetermined fixed volume of liquid for each revolution or fraction of revolution of the pump drive shaft. A passive magnetic sensor is positioned adjacent the toothed periphery of a target wheel, which is mounted on the motor shaft, and generates a signal representative of the amount of rotation of the pump drive shaft. The electronic control is responsive to this signal for calculating the total volume of liquid dispaced by the pump. The electronic control includes a keyboard which enables a user to preprogram the precise amount of liquid to be dispensed.