Patents in subclass Pumps/Axial Cam
Parent class: Pumps
| Number | Patent title | Issue Date |
|---|---|---|
| 07367783 | Rotating fluid machine A rotary valve for switching supply passages, and discharge passages of high-temperature and high-pressure steam for a rotor rotatably supported at a casing is constructed by making a fixed side valve plate and a movable side valve plate... |
05/06/2008 |
| 07364408 | Crank case shut off valve The invention provides a compressor with a shut off valve disposed between the crank case and the suction cavity. The valve is moveable between an open and closed position in response to the pressure in the discharge cavity of the... |
04/29/2008 |
| 07364409 | Piston assembly for rotary hydraulic machines A piston assembly for a hydraulic machine is formed with a part spherical cavity in the piston to receive a spherical bearing of a slipper assembly. The spherical bearing is secured in the cavity by swaging the walls of the piston and... |
04/29/2008 |
| 07320576 | Clutchless variable displacement refrigerant compressor with mechanism for reducing displacement work at increased driven speed during non-operation of refrigerating system including the compressor In a variable displacement swash plate type refrigerant compressor (10), a stopper (28) is provided for setting an initial angle of the inclination angle of a swash plate (23) when a drive shaft (19) is not driven. When the drive shaft... |
01/22/2008 |
| 07232293 | Manual hydraulic pump A manual hydraulic pump includes a cylinder block 10 and an end block 8. The rear end of the cylinder block 10 and the end block 8 defines an end space 21 between them. The cylinder block 10 has cylinders 13 and oil passages 23. Each oil... |
06/19/2007 |
| 07207784 | Hybrid compressor and control device When a hybrid compressor starts being driven by an electric motor, the electric current of a capacity control valve is applied at an initial control electric current SS that is greater than a control electric current S, which is from the... |
04/24/2007 |
| 07172393 | Multi-cylinder compressors and methods for designing such compressors A multi-cylinder compressor includes a valve plate having a plurality of cylinder suction ports formed therethrough, and a plurality of cylinder bores centered on an arc having a radius (R). The cylinder bores are substantially equally... |
02/06/2007 |
| 07172394 | Saddle bearing liner for axial piston pump A saddle bearing liner (30) for a variable displacement axial piston pump (10) includes two axially-spaced apart bearing surfaces (62, 64) with an offset central section (54) integrally joining them. A hollow projection (80) extends... |
02/06/2007 |
| 07162948 | Variable stroke assembly balancing An assembly includes a piston and a transition arm coupled to the piston. The position of the transition arm is adjustable to vary a stroke of the piston. A balance member is adjustable relative to the transition arm to counterbalance the... |
01/16/2007 |
| 07144227 | Reciprocating-piston machine with a driver In a reciprocating-piston machine, in particular a refrigerant compressor for a motor vehicle air-conditioning system, comprising a machine shaft rotatably supported in a housing with a plurality of pistons arranged circularly around the... |
12/05/2006 |
| 07114432 | Torque limiting device for hydraulic piston pump A torque control for a hydrostatic piston pump that provides for a servo piston rod that is connected to the swashplate of the pump and connected to a servo piston within a first cavity that receives compensation pressure that urges the... |
10/03/2006 |
| 07048515 | Hydraulic drive system and method using a fuel injection control unit A fuel injection control unit, including an electronic governor and a controller for an engine performs control in a governor region based on an isochronous characteristic. A working machine controller receives a delivery pressure signal... |
05/23/2006 |
| 07033149 | Medium pump adapted for ease of disassembly and assembly A medium pump for a motor includes a pump case with a pump cylinder and a pump piston positioned displacaebly in the pump cylinder in the direction of a pump axle. The pump piston rotates about the pump axle by running off an oblique... |
04/25/2006 |
| 07004729 | Compressor with pot-shaped housing and housing sealing cover A compressor, in particular for air conditioning systems in motor vehicles, having a housing, a housing sealing cover, a drive shaft with bearings and a drive device for pistons that are displaced back and forth. The drive device... |
02/28/2006 |
| 06991435 | Variable displacement compressors which estimate an inclination angle of a plate of the compressor A variable displacement compressor includes a plate having a variable inclination angle, and a piston engaging the plate. The piston reciprocates within a bore of the compressor in accordance with a rotation of the plate, and the piston... |
01/31/2006 |
| 06957604 | Axial-piston drive system with a continuously adjustable piston stroke The invention relates to an axial piston drive with a continuously adjustable piston stroke, which comprises a drive shaft (10, 12) on which a swash plate (16) is supported in a crank chamber (14) in such a way as to be tiltable and... |
10/25/2005 |
| 06957950 | Compressor with compact screw connected housing and adjustable mounting means According to the invention, a compressor having a threaded screw connection portion formed directly on a fitting portion of the housing is provided. Since no through bolt or the like for connecting two-parts of the housing is used, the... |
10/25/2005 |
| 06926501 | Two-piece swashplate pump housing A housing for a hydraulic pump is provided. The pump has an input shaft connected to a swashplate, a plurality of pistons, a plurality of check valves, and a metering device having an actuator. The housing includes a first housing member... |
08/09/2005 |
| 06913447 | Metering pump with varying piston cylinders, and with independently adjustable piston strokes A metering pump includes an actuating mechanism, and a plurality of piston cylinders coupled to the actuating mechanism. A first of the cylinders has a working volume that differs from a second of the cylinders. The actuating member is... |
07/05/2005 |
| 06866484 | Multi-cylinder high-pressure plunger pump The invention relates to a multi-cylinder high-pressure plunger pump with a plurality of plungers and a drive unit therefor which is arranged in a housing, the plungers being arranged equidistantly on a circle and the drive unit... |
03/15/2005 |
| 06863503 | Variable capacity compressor A variable capacity compressor like a swash plate type where a pressurized fluid is fed to a control pressure chamber such as a swash plate chamber to apply a backpressure to a piston etc. and the backpressure is changed by the capacity... |
03/08/2005 |
| 06863505 | Wind driven high pressure water pump This invention relates to a wind mill which is designed to convert rotational energy to mechanical energy to drive one or more pistons to raise a liquid such as water to an elevated location if necessary at a positive pressure. In... |
03/08/2005 |
| 6848888 | Sensor for a variable displacement pump A sensor for a variable displacement pump is provided. The pump has a housing containing a swashplate that is adapted to rotate about an axis. The sensor includes a magnet connected to the swashplate to rotate with the swashplate. A... |
02/01/2005 |
| 6848888 | Sensor for a variable displacement pump A sensor for a variable displacement pump is provided. The pump has a housing containing a swashplate that is adapted to rotate about an axis. The sensor includes a magnet connected to the swashplate to rotate with the swashplate. A... |
02/01/2005 |
| 06848888 | Sensor for a variable displacement pump A sensor for a variable displacement pump is provided. The pump has a housing containing a swashplate that is adapted to rotate about an axis. The sensor includes a magnet connected to the swashplate to rotate with the swashplate. A... |
02/01/2005 |
| 06846165 | Hydrostatic machine The invention relates to a hydrostatic machine (1) comprising at least one first hydrostatic unit (E1) and one second hydrostatic unit (E2), each hydrostatic unit (E1, E2) comprising respective pistons (14a, 14b) guided in respective... |
01/25/2005 |
| 06823768 | Nitrided surface layer on a swash plate boss A swash plate for a swash plate-type, variable displacement compressor, such that the compressor is driven by a drive shaft having a shaft axis. The swash plate includes a boss that is penetrated slidably by the drive shaft. The boss is... |
11/30/2004 |
| 06799952 | Pneumatically operated compressor capacity control valve with discharge pressure sensor A pneumatically-operated control valve selectively opens and closes a passage between discharge and crankcase chambers of a variable capacity refrigerant compressor for purposes of controlling the compressor capacity, and includes an... |
10/05/2004 |
| 06796774 | Axial piston engine An axial piston engine (1), including a housing (2) in whose inner compartment (4) a cylinder drum (17) and a swash plate (26) located axially adjacent thereto are situated. Several piston bores (21), which extend approximately parallel... |
09/28/2004 |
| 06793463 | Tandem pump and interface for same A method of assembling a tandem pump comprising first and second pumps connected in tandem by an interface. Each pump has a housing and an end cap containing hydraulic porting. The interface connects the end cap of one pump to the housing... |
09/21/2004 |
| 06786202 | Hydraulic pump circuit A hydraulic pump is provided that includes a housing having a fluid inlet and a fluid outlet. A pumping element is operable to increase the pressure of fluid received through the fluid inlet and to generate a flow of pressurized fluid... |
09/07/2004 |
| 06786704 | Compressor with single shaft support A piston type compressor having a drive plate (swash plate), wherein sliding friction between the drive plate and shoes is reduced and the compressor is made smaller by slidably attaching the shoes engaged with spherical ends of pistons... |
09/07/2004 |
| 06736605 | Tandem pump unit The present invention provides a tandem pump unit that includes: a first hydraulic pump and a second hydraulic pump respectively having a first pump shaft and a second pump shaft respectively having adjacent ends connected together so... |
05/18/2004 |
| 06729853 | Displacement control device for variable displacement compressor A first bleed passage and a second bleed passage each connect a crank chamber of a compressor with a suction chamber of the compressor. A first supply passage and a second supply passage each connect the crank chamber with a discharge... |
05/04/2004 |
| 06715997 | Housing for a rotary hydraulic unit with a servo piston A variable displacement hydraulic power unit has a housing and a rotating piston block with a rotatable axis and a servo piston bore having a reciprocal piston therein with the bore extending in a direction parallel to the rotatable axis... |
04/06/2004 |
| 06705181 | Torque transmission apparatus A torque transmission apparatus absorbs torque fluctuations (vibrations) while limiting the size of the outside dimensions of a pulley. Elastomeric dampers and pendulum type vibration-absorbing mechanisms are located between an outer tube... |
03/16/2004 |
| 06705841 | Variable displacement compressor with stepped shaft A variable displacement piston compressor comprising a housing and a shaft supported within the housing for rotational movement about an axis. The shaft includes a stepped down portion defining a reduced diameter within the shaft. A pin... |
03/16/2004 |
| 06682312 | Tandem pump and interface for same A tandem pump comprising first and second pumps connected in tandem by an interface. Each pump has a housing and an end cap containing hydraulic porting. The interface connects the end cap of one pump to the housing of the other pump. |
01/27/2004 |
| 06663354 | Hydrostatic axial piston machine with a control port, a cradle supported swashplate and a swashplate actuating piston A hydrostatic axial piston machine has a cylinder block with bores holding reciprocating pistons, a swashplate supporting the pistons, and control cams to supply the bores with hydraulic fluid. The swashplate is a pivoting cradle mounted... |
12/16/2003 |
| 06659733 | Variable displacement compressor A variable displacement compressor includes a cylinder block and a valve plate connected to the cylinder block. The cylinder block has cylinder bores and a central supporting hole. A piston is housed in each cylinder bore to compress gas.... |
12/09/2003 |
| 06640687 | Control system for hydrostatic pump A non-feedback proportional system is provided to achieve desired operating characteristics which will allow the control of a hydrostatic transmission to closely approximate the control performance of a displacement feedback control... |
11/04/2003 |
| 06632074 | Pressure setting means for a multistage type piston compressor A multistage piston compressor includes a case and a suction chamber and a discharge chamber provided in the case. A rotary shaft is supported in the case. A valve plate provided in the case includes suction ports and discharge ports. A... |
10/14/2003 |
| 06629823 | Compressors Compressor are taught that may include a suction port to draw refrigerant and a discharge port to discharge compressed refrigerant. A driving shaft is disposed within a compressor driving chamber. A swash plate is inclinably and slidably... |
10/07/2003 |
| 06623247 | Method and apparatus for controlling a variable displacement hydraulic pump A method and apparatus for controlling a variable displacement hydraulic pump having a swashplate pivotally attached to the pump. The method and apparatus includes determining a desired swashplate angle as a function of a power limit of... |
09/23/2003 |
| 06595886 | Hydrostatic axial piston machine with a swashplate construction A hydrostatic axial piston machine with a swashplate construction formed with an axially short construction. The cylinder block has a plurality of bores received in movable pistons. The pistons are each supported by respective slippers... |
07/22/2003 |
| 06572342 | Variable capacity compressor and method of manufacturing An easy method for manufacturing a swash plate and a variable capacity swash plate compressor adopting the swash plate are provided. The method for manufacturing a swash plate or a hub having a boss including a through hole includes:... |
06/03/2003 |
| 06547531 | Variable-displacement axial piston pump A conventional variable-displacement, axial piston-type hydraulic fluid pump having a pump housing is provided with co-operating pump rotational speed, thrust plate position, and working pressure operating-condition sensor assemblies that... |
04/15/2003 |
| 06540488 | Slant plate-type variable displacement compressors with capacity control mechanisms A slant plate-type variable displacement compressor includes a housing enclosing a crank chamber, a suction chamber, and a discharge chamber. The housing includes a cylinder block, and cylinder bores are formed therein. Pistons are... |
04/01/2003 |
| 06517321 | Variable displacement compressor A variable displacement compressor has a crank chamber defined in a housing. A drive shaft is arranged in the housing. A piston is accommodated in the cylinder bore. A swash plate is connected to the piston to convert a rotation of the... |
02/11/2003 |
| 06517322 | Hydrostatic variable displacement pump having a compact housing to facilitate swash plate installation A hydrostatic variable displacement pump of swash plate construction has a cylinder block 2, in a housing 1, with displacement pistons 3 guided therein, a swash plate 4 and at least a first bearing 5 and a second bearing 6, which supports... |
02/11/2003 |