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| Number | Title | Issue Date |
| 8037808 | Axial piston machine An axial piston machine utilizing a swashplate design has a cylinder drum (3) that is mounted so that it can rotate around an axis of rotation (2). The cylinder drum (3) is provided with cylinder bores (4), in each of which a piston (5... | 10/18/2011 |
| 7739945 | Bent axis pump A bent axis pump wherein the coupling between a cylinder body and a connecting pin of a back body takes place by the interposition of a bush suitable for guiding the rotation of the cylinder body limiting the friction between the cylinder body and the pin. The pin l... | 06/22/2010 |
| 7546797 | One piece slipper holddown device A holddown pin mechanism for hydraulic power units is a ball guide with a cylindrical flat base having a central opening, a plurality of spaced elongated holddown pins have one end rigidly secured to one side of said ball guide. The pins extend outwardly at right an... | 06/16/2009 |
| 7367259 | Pressure pin and axial piston machine having said pressure pin An axial piston machine (1) having a rotatably mounted cylinder drum (5) which in turn has a center recess (38) and a plurality of cylinder bores (6) that extend substantially axially relative to the center bore (38) and in which p... | 05/06/2008 |
| 7363849 | Axial piston machine with offset positioning element and cam disk for such an axial piston machine The invention relates to an axial piston machine (1) comprising a housing (2) in which a drive disk (7) and a cylinder block (12) axially disposed next to it are received so as to be rotatable relative to each other about longitudinal cen... | 04/29/2008 |
| 7340988 | Hydraulic machine having axial pistons with a synchronization system The hydraulic machine having axial pistons comprises: a cylinder block mounted to rotate about a first axis of rotation; and a swash plate supporting a sliding disk in rotation about a second axis of rotation which is inclined relative to the first axis of rotation.... | 03/11/2008 |
| 7337869 | Hydraulic hybrid vehicle with integrated hydraulic drive module and four-wheel-drive, and method of operation thereof A vehicle includes an integrated drive module coupled to an axle thereof. The module includes a hydraulic motor configured to provide motive power at an output shaft, and a differential for distributing the motive power to right and left portions of the axle. The hy... | 03/04/2008 |
| 7331272 | Multiple-stroke hydrostatic axial piston machine A multiple-stroke hydrostatic axial piston machine has a plurality of piston-shaped displacement bodies (13) that can each move longitudinally in a displacement chamber (12) and are each supported by a roller body on a track (9) that is provided... | 02/19/2008 |
| 7325477 | Device for reducing energy losses in a machinery unit The present invention relates to a device for reducing energy losses in a machinery unit (1), having at least one part (4) which is arranged to rotate in fluid about a rotation axis (6) in a substantially closed chamber (3) delimited in t... | 02/05/2008 |
| 7320273 | Compressor A compressor used in a refrigerating cycle is provided as a miniaturized and lightweight unit at low production cost by selecting an optimal material to constitute components or by forming the housing in a specific shape so as to allow the components to have smaller... | 01/22/2008 |
| 7305915 | Efficient pump/motor with reduced energy loss A bent axis pump/motor includes a back plate positioned within a casing, and a check valve positioned in the back-plate, the check valve configured to control passage of fluid from within the casing to an interior of the back plate. A yoke, coupled to the back plate... | 12/11/2007 |
| 7178449 | Hydraulic device driving a rotating receiver Hydraulic device driving a rotating receiver such as a shaft (1) includes at least one hydraulic motor having axial pistons (7) bearing against a fixed swash-plate (9) via shoes (10), the pistons (7) being arranged in a rotating ba... | 02/20/2007 |
| 7174827 | Mounting clip for thrust bearing A compressor assembly comprising a housing having a shaft bore therein, a main shaft positioned for rotation within the shaft bore, at least one roller thrust bearing and a thurst surface bearing clip. The thrust surface bearing clip comprises a first position confi... | 02/13/2007 |
| 7121190 | Fluid machine for gas compression refrigerating system A fluid machine for a gas compression refrigerating system comprises a first and a second working for performing a pump mode operation, in which working fluid of low pressure is sucked into and compressed by the working chambers. The fluid machine further comprises ... | 10/17/2006 |
| 7114434 | Reciprocating compressor A reciprocating compressor, comprising a cylinder block (1) having a cylinder bore (12) formed therein, a rear head (3) fixed to the cylinder block through a valve plate (2) and having a suction chamber (26) and a discharge chamber... | 10/03/2006 |
| 7076948 | Hydraulic continuously variable transmission To reduce the projection of a swash plate servo mechanism in the radial direction, and to make a hydraulic continuously variable transmission compact, a swash plate plunger pump includes a pump casing provided with an input driven gear. A pump cylinder and a motor c... | 07/18/2006 |
| 7029241 | Circumferential piston compressor/pump/engine (CPC/CPP/CPE); circumferential piston machines A rotary piston machine includes a first spheroidal element including pistons and/or cylinders and a second spheroidal element including pistons and/or cylinders, wherein the first element can move relative to the second element. The machine can be used as part of a... | 04/18/2006 |
| 6996980 | Bent axis hydrostatic unit with multiple yokes A hydrostatic module is disclosed, including a pair of shafts rotatably supported by a frame. Two yokes are pivotally mounted on the frame, each having complimentary surfaces to the other yoke and to the frame, minimizing the space occupied by the yokes. Stop means ... | 02/14/2006 |
| 6981321 | Hydrostatic cylinder block and method of making the same A hydrostatic cylinder block having a split cylinder block with a slipper hold-down created by breaking down the cylinder block into its basic geometries through near net shaping technology. The cylinder block is broken down into four separate components: a hub, a w... | 01/03/2006 |
| RE38843 | Hydrostatic slewing drive A hydrostatic slewing drive suitable for use in construction equipment, in particular excavators, has a pinion shaft that is rotationally mounted in a housing. A slewing pinion is connected to the pinion shaft. An axial piston motor that utilizes a swashplate constr... | 10/25/2005 |
| 6938590 | Rotary piston motor An internal combustion, reciprocating piston, motor has a rotating cylinder block. A journal bearing supports a roller that is fastened to a piston connecting rod or fastened to the piston so the roller pushes against an inclined surface on a stationary guide track ... | 09/06/2005 |
| 6908286 | Main rotor shaft mounted hydraulic pressure system A rotor system includes a hydraulic pressure system located within a rotor shaft along an axis or rotation. The hydraulic pressure system is within the rotating field such that fluid pressure is generated and supplied from within the rotational field without the nee... | 06/21/2005 |
| 6887045 | Hydraulic transformer A hydraulic transformer wherein a multiplicity of displacers are guided in a displacement member. The stroke of the displacers is determined through the intermediary of a cam element, with pressure medium supply and discharge being controlled through the intermediar... | 05/03/2005 |
| 6874994 | Hydraulic pump and motor A hydraulic unit has a drive shaft (52) mounted in a manifold block (54) and coupled to a torque plate (80) on a central axis. A bent axis motive unit (60) has a yoke connected to the manifold block supported for rotation on the yoke. Hol... | 04/05/2005 |
| 6779433 | Axial piston engine The invention relates to an axial piston engine (1) with a housing (2), inside the housing interior (4) of which a drive shaft (7) and a cylinder drum (16), arranged axially adjacent to said shaft, are rotatably mounted. The longit... | 08/24/2004 |
| 6736048 | Hydrostatic axial piston machine A hydrostatic axial piston machine has a drum-like cylinder block which is supported in a manner fixed against rotation on a driving or output shaft and is provided concentrically and parallel to its center line with cylinder boreholes in which axially displaccable ... | 05/18/2004 |
| 6669450 | Rotary slant shaft type gas compressor with multi-stepped exhaust system A rotary slant shaft type gas compressor having a multi-stepped exhaust system is provided, which includes: a driving shaft fixed with a cylinder head formed with gas holes; a gas guide member for intake of gas and discharge of compressed gas; a case head... | 12/30/2003 |
| 6644170 | Double spline hydraulic pump In a hydraulic pump assembly, an annular sleeve member is radially interposed between an outer peripheral surface portion of an input shaft and an inner peripheral surface portion of a cylinder block or barrel within which are provided a plurality of pist... | 11/11/2003 |
| 6604450 | Hydrostatic slewing drive A hydrostatic slewing drive suitable for use in construction equipment, in particular excavators, has a pinion shaft that is rotationally mounted in a housing. A slewing pinion is connected to the pinion shaft. An axial piston motor that utilizes a swashp... | 08/12/2003 |
| 6579072 | Swash plate pump with low stress housing A rotary pump has a rotor with a first end, a second end opposite the first end, a central bore and a plurality of cylinder bores arranged about the central bore and extending completely through the rotor from the first end to the second end. There is a p... | 06/17/2003 |
| 6564693 | Axial piston pump of the type having intersecting axes The invention relates to a hydraulic pump having axial pistons, the pump being of the type having intersecting axes, and comprising a rotary rotor with a central axis co-operating with an associated distribution seat via a bearing surface that is substant... | 05/20/2003 |
| 6554582 | High pressure pump with improved hub A pump has a main unit (18) for pumping a transferred liquid which is actuated by an secondary unit (20) which pumps a working liquid. The secondary unit (20) has a hub (64) which is rotably mounted in a housing (16). The hub has a cylindrical guiding sur... | 04/29/2003 |
| 6422129 | Swash plate type refrigerant compressor A piston-operated compressor, of swash plate type and using CO2 as a refrigerant, having a casing member in which a cylinder bore is formed to have a cylindrical peripheral wall surface and a piston reciprocating for compression in the cylinder... | 07/23/2002 |
| 6336391 | Hydraulic rotating axial piston engine A hydraulic rotating axial piston engine having a housing enclosing a rotatable cylinder barrel. The engine has a number of axial cylinders with a number of reciprocating pistons. The pistons reciprocate between two defined end positions, and cooperate wi... | 01/08/2002 |
| 6324959 | Piston pump motor The invention can prevent a heat generation and a seizure due to a sliding friction between a piston and a cylinder in inclined shaft type and swash plate type hydraulic pumps even when they are made high speed. In order to achieve this, a piston pump mot... | 12/04/2001 |
| 6318236 | Reciprocal motion type compressor having a piston in which strength is increased There is provided a reciprocal motion type compressor which has a piston reciprocally movable in a cylinder. The piston has a piston cover and a piston body portion. The piston cover has an insertion portion engaged with the piston body portion. The inser... | 11/20/2001 |
| 6301891 | High efficiency, air bottoming engine An air bottoming powertrain, suitable for use in automobiles includes an internal combustion engine, a compressor which receives gaseous working fluid and compresses it to an elevated pressure, a cooler for operating the compressor isothermally, an expand... | 10/16/2001 |
| 6279452 | Axial piston motor with bearing flushing The invention relates to an axial piston motor constructed as a swivel-slide structure with a channel to feed cleaning fluid to the driving shaft bearings. The axial piston motor (1) comprises a swivelling cylinder drum (8) and a driving shaft (3) support... | 08/28/2001 |
| 6256989 | Method and apparatus for improved hydrostatic transmission having bypass An improved hydrostatic transmission having means for hydraulically bypassing the hydrostatic transmission, and the method for bypassing the hydrostatic porting to enable free wheeling of the vehicle. The bypass in one embodiment includes a plate or simil... | 07/10/2001 |
| 6250204 | Compressor, in particular for a vehicle air conditioning system A compressor, in particular for a vehicle air conditioning system, with a housing, which contains a device for conveying a compressed medium driven by a drive shaft, designed as an axial piston machine and having at least one piston reciprocating in a cyl... | 06/26/2001 |
