Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 451 - 500 out of 6,286

Document Document Title
WO/1999/056018A1
The invention relates to an axial piston variable displacement machine for converting hydraulic work into mechanical work or vice versa, comprising a plurality of hydraulic cylinders (2) that are rotationally mounted with substantially p...  
WO/1999/054624A1
A hydraulic rotating axial piston engine, having a housing (2), enclosing a rotatable cylinder barrel (11), having a number of axial cylinders (13) with a number of reciprocating pistons (12). The pistons reciprocate between two defined ...  
WO/1999/054625A1
A pressure transformer (10) has an adjustable port plate (26) between the barrel (40) of the rotating cylinder block and the head block (28). The barrel (40) contains a plurality of cylinders (44) for the pistons (47). The cylinder ports...  
WO/1999/051881A1
The invention relates to a hydraulic axial piston pump, motor or pressure transformer with a plurality of fluid chambers in the rotating cylinder block (6). The volume of the fluid chambers (7) changes between a minimum value (discharge)...  
WO/1999/050085A1
The invention relates to a hydrostatic mechanical drive, comprising a hydrostatic radial piston motor (4) whose pistons are supported by rollers on an outerlying cam ring (8), said cam ring being rigidly connected to the drive housing (1...  
WO/1999/046504A2
The invention concerns a technically optimised radial piston engine comprising a cam ring and a cylinder block arranged so as to rotate about an axis of rotation relative to the cam ring and having a plurality of cylinders oriented in th...  
WO/1999/041500A1
A hydraulic rotating axial piston engine (1), having a housing, enclosing a cylinder barrel (111) journalled in said housing for rotation around a barrel axis and having a number of circumferentially arranged cylinders (113b) with a numb...  
WO/1999/041499A1
A hydraulic rotating axial piston engine (1), having a housing (2), enclosing a rotatable cylinder barrel (11), having a number of axial cylinders (13a, 13b) with a number of reciprocating pistons (12). Said pistons being reciprocating b...  
WO/1999/039099A1
A lubrication path in a gerotor motor (10) extending in the face of the rotor (45) or an adjoining surface (27) from a gerotor cell (47) having a relatively high pressure to the central cavity (52) of the device to provide cooling and lu...  
WO/1999/030034A1
A hydraulic rotating axial piston engine, having a housing, enclosing a rotatable cylinder barrel, having a number of axial cylinders with a number of reciprocating pistons, said pistons reciprocating between two defined end positions. T...  
WO/1999/030030A1
The invention relates to a drive device (10) which has small dimensions in an axial and radial direction. The small dimensions of said device are a result of the brake body (202) of a friction brake (200) provided in the drive device bei...  
WO/1999/027254A1
The stator, rotor and/or flex shaft of a progressive cavity motor is made up of composite materials, e.g., fiberglass and resin, in a variety of combinations with and without bonded resilient elastomers. The composites are formulated to ...  
WO/1999/025954A1
A small rotor (7) integrated with a main shaft (6) is eccentrically disposed in a large rotor (8) composed of an annular tube for holding a bearing in a bearing housing (9); paired slide grooves (12, 13) having prescribed relative orient...  
WO/1999/024711A1
The invention concerns a radial-piston hydraulic motor (10), which comprises one or several cylinder groups (1) placed in a stationary position, which cylinder groups contain piston mechanisms (16a¿1?, 16a¿2?,; 17a¿1?, 17a¿2?...) mov...  
WO/1999/020899A1
A hydraulic pump or motor adapted to reliably prevent the contact surfaces of a piston and a shoe from being separated from each other while allowing a slight slide thereof, comprising a hemispherical shoe contacting a rotary board membe...  
WO/1999/002855A1
The invention concerns a device comprising first and second brake means (16, 20) respectively integral with the first and second element (10, 12) in rotation about an axis of rotation (14), and a brake piston (18) capable of taking up an...  
WO/1999/002854A1
Moteur hydraulique (1) comprenant un carter (2A, 2B), un organe de réaction ayant un profil de réaction (4), un bloc-cylindres (6), un distributeur interne de fluide (16) susceptible de mettre les cylindres (12) du bloc-cylindres (6) e...  
WO/1998/037324A1
An inclined shaft type axial piston pump motor is capable of preventing galling and seizure at spherical-shaped sliding surfaces of a cylinder block and a valve plate and permits high speed. Thus the axial piston pump motor comprises a s...  
WO/1998/030800A1
A radial piston motor comprising a cylinder block (1), a motor case (3) fitted rotatably to the outer peripheral surface of the cylinder block and having a rotating cam (12) on the inner surface thereof, a plurality of cylinder portions ...  
WO/1998/020255A1
A cam motor device (A) comprises a plurality of cylinders (5, 5, ...) provided in a cylinder block (2) adapted to rotate together with an output shaft (10), and arranged radially in a direction perpendicular to a rotating axis (X), pisto...  
WO/1998/020258A1
The invention concerns an axial piston machine (1) which comprises a cylinder block (2) having cylinder bores (3, 4) in which pistons (5, 6) are movably guided, said pistons (5, 6) being supported on an inclined or wobble plate (25) in o...  
WO/1998/018646A1
An electric car in which an electric current sent from one of battery cassettes (5), which are used in an interchanging manner, and through a high-voltage relay (6) is regulated by a controller (3), a rotational force obtained by operati...  
WO/1998/016744A1
A hydraulic motor (100) for incorporation in a vehicle which has road engaging wheels and rail engaging wheels. The motor (100) has a shaft (102) which rotatably supports an outer housing (103) fixed to a wheel (129). Mounted on the shaf...  
WO/1998/016738A1
In a hydraulic system, a rotary type hydraulic transformer is continuous, small in pulsation and compact, and intended for increasing a system pressure. The hydraulic transformer comprises a first volume increasing and decreasing mechani...  
WO/1998/016743A1
A rotary hydraulic machine (10) for incorporation in a drill string (92) of a well formation (86). The machine (10) is particularly adapted to act as a motor and includes an outer housing (11) of a generally cylindrical configuration hav...  
WO/1998/015734A1
When molding a casting (77) which is a material for a casing body (62), metallic pipes (76) are integrally cast which are to make oil passages (64) for inclinedly rotating actuators (14) for a swash plate (12). The metallic pipes (76) ar...  
WO/1998/011345A1
The invention relates to a hydraulic pump in which a pump drive mechanism is rotationally driven by a drive shaft and accomodated in a housing chamber. The housing has two connecting openings for the supply and discharge of the hydraulic...  
WO/1998/007962A1
A thermal hydraulic engine (7) including a frame (202). A working fluid changes volume with changes in temperature. A working fluid container (130) houses the working fluid. A cylinder (100) secured to the frame (202) includes an interio...  
WO/1997/040273A1
The stator, rotor and/or flex shaft of a progressive cavity pump is made up of composite materials, e.g., fiberglass and resin, in a variety of combinations with and without bonded resilient elastomers. The composites are formulated to p...  
WO/1997/029334A1
The invention relates to a rotary, regenerative heat exchanger having a vertical hub (2) supporting a rotor (1) containing a heat exchange medium. The bottom end of the hub (2) is supported by a thrust bearing (3). The upper end is guide...  
WO/1997/012123A1
A hydraulic machine (1) is disclosed, having a gearwheel (4), which is arranged on a shaft (2) so that they rotate together and which has a first external toothing (5), a gear ring (7), which has a second external toothing (8) and a firs...  
WO/1997/004233A1
An axial piston micropump (100) is disclosed, having a cylinder drum (2), in which several cylinders (41, 42) are provided, and a swash plate (1), with respect to which the cylinder drum (2) is rotatable. It is desirable for such a micro...  
WO/1997/002406A1
A vane motor comprises a housing and a vane rotor mounted inside the housing with a friction brake device mounted in the housing and used for braking, stopping and releasing the vane rotor. At least one (first) of the two faces of the va...  
WO/1996/041951A1
A hydraulic planetary piston motor (1) is disclosed, having a set of gearwheels (4) comprising an internally toothed annular gear (2) and an externally toothed gearwheel (3) which mesh with one another and form working chambers (5), whic...  
WO/1996/041950A1
A hydraulic planetary piston motor (1) is disclosed having a set of gearwheels (4) comprising an internally toothed annular gear (2) and an externally toothed gearwheel (3) which mesh with one another and form working chambers (5), which...  
WO/1996/032587A1
An apparatus for controlling swash-plate pumps and motors, provided with a piston (40) fitted slidably in a cylinder bore (31) formed in a housing (20), a large-diameter pressure receiving chamber (43) and a small-diameter pressure recei...  
WO/1996/020355A1
A brake device for a hydraulic motor comprising a fixed side friction plate and a movable side friction plate mounted, respectively, on a housing of a hydraulic motor and a cylinder block, a piston for press contacting the fixed side fri...  
WO/1996/012889A1
A variable-speed hydraulic motor comprising a cylinder block (25), a plurality of pistons (28) and a swash plate (30) for changing the strokes of the pistons. The swash plate is swung to increase its tilt by the resultant force (F1) of t...  
WO/1996/011336A1
A hydraulic motor including a motor housing (22) formed by coupling a motor case (20) and an end cover (21), a cylinder block (23) rotatably fitted into the motor housing (22) through a shaft (24), a plurality of cylinder holes (25) form...  
WO/1996/002756A1
A hydraulic piston machine (1) is disclosed, having a cylinder body (2), which has at least one cylinder (5), in which a piston (6) is arranged to move back and forth and bears by way of a slide shoe (9) against a control surface, and ha...  
WO/1995/031641A1
The invention concerns a radial-piston hydraulic motor, which comprises one or several cylinder groups (1), which cylinder groups include piston mechanisms (2) that move radially back and forth. The piston mechanisms (2) comprise a pisto...  
WO/1995/016128A1
Hydraulic piston engine such as a radial piston motor which is driven by a lubricant-free, water-based pressure fluid. The drive shaft (6) is made of steel and is supported by radial journal bearings placed in bearing bushings (9) fabric...  
WO/1995/016129A1
A hydraulic piston engine (1) driven by a lubricant-free, water-based pressure fluid, and comprising an enclosing housing (2) and a piston-connected drive shaft (6) supported by radial journal bearings in bearing bushings (9). One of the...  
WO/1995/016131A1
A hydraulic axial piston motor (1) is disclosed, having a rotatable cylinder drum (4), in which several work pistons (6), each provided at one end with a slider shoe (7), are arranged in work cylinders (5) so as to be axially movable, ha...  
WO/1995/016132A1
A hydraulic axial piston motor (1) is disclosed, having a cylinder drum (4) which is connected, so that it is non-movable axially, to a shaft (3) and so that they rotate together, and which has at least one cylinder (5), for each cylinde...  
WO/1994/028317A1
Cavitation in axial piston motors (20) caused to act as a pump by an aiding load (28), and the related difficulty of loss of hydrostatic film (52), and tipping or hammering of motor slippers (64), can be reduced by a method which include...  
WO/1994/023918A1
A hydrostatic-mechanical gear is disclosed for driving a mixing drum, in particular the drum of a concrete mixer truck. In order to improve cooling, oil is continuously removed from the high pressure circuit (pipe 4 or 5). Cooled oil is ...  
WO/1994/023209A1
A gear pump or compressed air motor for delivering a liquid has the following characteristics: meshing pairs of gears (1, 2) with parallel axes; a housing (3) that encloses the gears and has an envelope wall (3.1, 3.2); an inner wall sur...  
WO/1994/023198A1
The invention relates to a hydraulic drive system for driving primarily heavy industrial units, where the drive system comprises a plurality of hydraulically driven piston units (14) with cam rollers (30), which are disposed to act again...  
WO/1994/021915A1
A pressure medium operated device generating to-an-fro motion to one or several pistons (14, 15) or a similar motion transmitting arm, comprised of a primary piston (3), to which motion is brought in transmitting pressure medium alternat...  

Matches 451 - 500 out of 6,286