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| Number | Title | Issue Date |
| 7334514 | Balanced fluid-powered modular actuation system This invention provides a modular, efficient and self-feedback/balance, fluid-powered actuation system. This system comprises two basic modules; actuation module and positioning module, which are directly connected to each other. The actuation modules can be constru... | 02/26/2008 |
| 7168929 | Pump aggregate for a hydraulic vehicle braking system A pump unit for a hydraulic vehicle brake system with traction control has an electric motor driving a radial piston pump. A rotor shaft of the pump unit has a hollow shaft with two standardized, hardened cylindrical pins that are press-fitted into the ends of the h... | 01/30/2007 |
| 7093528 | Seal and valve systems and methods for use in expanders and compressors of energy conversion systems An epicycling device with improved sealing. A housing is provided with adjacent walls spaced apart to allow a substantially planar partition to pass. A piston is linked eccentrically to a drive shaft and positioned within the housing, has a cross sectional shape for... | 08/22/2006 |
| 7028600 | Hydraulic radial piston engine A hydraulic radial piston engine has a lifting ring fixed to the casting, a rotor mounted opposite the lifting ring such that it is rotatable about an axis of rotation, multiple piston seats aligned radially in the rotor relative to the axis of rotation, and multipl... | 04/18/2006 |
| 5897302 | Reciprocating piston pump with radial cylinders based by a wire hoop spring against an eccentric shaft 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 ... | 04/27/1999 |
| 5839349 | Noise-abated pump unit, in particular for controlled brake systems 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.... | 11/24/1998 |
| 5655486 | Engine combustion A machine having a piston unit within a cylinder arrangement wherein each piston unit comprises a plurality of in-line pistons within their respective cylinders such that the pistons are in fluid communication with a common compression chamber and where t... | 08/12/1997 |
| 5573386 | Reciprocating piston pump A reciprocating piston pump having a housing, pistons disposed opposite one another in the housing, an eccentric between the pistons, annular grooves that fit around the piston necks machined into piston ends oriented toward the eccentric, and a U-shaped ... | 11/12/1996 |
| 5279209 | Rotary machine A machine that converts between reciprocating motion of a piston and rotary motion of a shaft. The shaft rotates an integral web that carries a number of lobe wheels spaced evenly about a pitch circle centered on the shaft. The lobe wheels are planetary d... | 01/18/1994 |
| 4983100 | Radial piston pump A radial piston pump in which an annular coupling device (10), whose axially directed extensions (11) each engage a working piston, has a preset break point (15) in the area of the axial extensions (11).... | 01/08/1991 |
| 4977606 | Radial piston pump A radial piston pump has diametrically opposed pistons coupled to each other by a coupling ring mounted in circumferential grooves located adjacent the facing ends of the piston. The coupling ring is formed with axially projecting bifurcated arms received... | 12/11/1990 |
| 4920862 | Trunk piston compressor The cylinders of the compressor each have a guide piston connected with a work piston with each being reciprocally mounted within a guide cylinder and work cylinder. In addition, seals are provided between the guide piston and the guide cylinder within a ... | 05/01/1990 |
| 4747339 | Radial piston machine In a radial piston machine which includes a driven rotatable rotor with radial pistons displaceable in radial recesses of the rotor by pressure medium and carrying rollers which cooperate with a cam track of the rigid cam plate, the length of the rollers ... | 05/31/1988 |
| 4745846 | Devices which take in and expel fluid by a chamber which may border a coned ring In a fluid pump or motor improvements are provided to the piston shoes therein to permit a higher pressure in the respective device. Other improvements are done to the hydrostatic bearings in radial piston or radial chamber type fluid motors and pumps. A ... | 05/24/1988 |
| 4653381 | Motor suspension apparatus for hydromotors A motor suspension apparatus for a hydromotor of the radial-symmetrical type, characterized by an arm which, in operation, is substantially horizontal, and one end of which is adapted for attachment to the hydromotor and the other end of which is pivotall... | 03/31/1987 |
| 4610606 | Gas refrigerant compressor including ported walls and a piston of unitary construction having a domed top A gas refrigerant compressor comprises a shaft having a first portion and an offset portion. A body supports the first portion of the shaft for rotating movement around an axis of rotation and defines a compression chamber. A compression member is adapted... | 09/09/1986 |
| 4545732 | Radial piston pump with a star-shaped connecting piece The pump contains cylinders (1) which are arranged in the form of a star and which are attached to a molding (12) with valve cartridges (8 and 9) being interposed. This molding (12) consists of two sets of pipes (17 and 18) which are arranged in the form ... | 10/08/1985 |
| 4370917 | Piston-rack rotary actuator A piston-rack rotary actuator having four pistons each with an integral rack and each displaceable along a cylinder unique thereto, the racks meshing with a center gear at equiangularly spaced points and causing angular movements of a shaft about its rota... | 02/01/1983 |
| 4331064 | Pressurized fluid mechanism such as a hydraulic engine The invention relates to a hydraulic engine with radial pistons, comprising girders which transmit the thrusts of the pistons and rest against strips secured to the cylinder block. The surface of the cylinder block has a degree of roughness at least equal ... | 05/25/1982 |
| 4256018 | Radial piston fluid engine The invention relates to an engine with radial pistons 9, which are coupled to elastic return means 25 for free-wheeling operation. Said elastic means are constituted by springs 25 whose number is equal to that of the pistons and by levers 21 mounted to pivot,... | 03/17/1981 |
| 4223595 | Device for coupling the pistons to the rotor in a radial-piston hydraulic motor The device is comprised of an auxiliary annular element concentrically mounted on each piston end facing the spherical surface of the rotor. Each piston end is provided with an annular shoulder bearing against a matching annular shoulder formed on the inn... | 09/23/1980 |
| 4212230 | Slide faces of piston shoes in radial piston machines Piston shoes in radial piston devices of the prior art were provided with balancing fluid pressure pockets of circular configuration or of elongation normal to the movement direction of the piston shoes. Piston shoes had to provide the space for said pock... | 07/15/1980 |
| 4077267 | Fluid transducer A fluid transducer including a reciprocatory piston member and a drive mechanism for converting reciprocation of the piston member into rotation of a rotary member coupled to the mechanism, or vice versa. The drive mechanism includes a first elliptical me... | 03/07/1978 |
| 4041844 | Hydrostatic piston machine The guide means for reciprocating the pistons of the cylinder block are mounted on rings which have bearing surfaces eccentric to the surface on which the cylinder block rotates. These rings are also of a diameter greater than the diameter of the surface ... | 08/16/1977 |
| 4037523 | Application of an entering or deep-diving piston shoe with a central radial support member and means for securing the same in fluid handling radial piston devices A radial-piston machine has a rotor formed with a plurality of axially extending slots in each of whose bases is formed a piston-carrying radial cylinder. Each such piston is formed on its radially outer end with a part-spherical seat and a part-spherical... | 07/26/1977 |
| 4033239 | Radial piston machine The moving parts of the machine are mounted as a unit on the control journal. These parts include the cylinder block, pistons, piston guide ring, lateral support disks and drive shaft. The unit may be removed as such without having to remove the control j... | 07/05/1977 |
| 4004498 | Hydraulic motor An intermittent hydraulic motor which comprises: a crank shaft; a plurality of hydraulic cylinders having pistons engaging with an eccentric member of said crank shaft; pressure oil lines connected to said hydraulic cylinders; check valves having choke va... | 01/25/1977 |
| 3968736 | Radial fluid-pressure apparatus A radial type of fluid-pressure apparatus, such as a pump or motor, wherein a crankshaft is supported for rotation about its axis and has a crankpin radially spaced from its axis and connected with the inner end region of a piston which extends outwardly ... | 07/13/1976 |
| 3945303 | Hydrostatic piston machine The bearing surface of each piston is provided with hydrostatic pressure medium during operation to maintain the axis of the piston perpendicular to the guide surface. The pressure medium is supplied through throttle passages which terminate in feed openi... | 03/23/1976 |
