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Matches 451 - 500 out of 2,276

Document Document Title
WO/1998/016738
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/1998/016743
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/1998/015734
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/1998/011345
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/1998/007962
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/1997/040273
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/1997/029334
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/1997/012123
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/1997/004233
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/1997/002406
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/1996/041951
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/1996/041950
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/1996/032587
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/1996/020355
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/1996/012889
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/1996/011336
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/1996/002756
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/1995/031641
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/1995/016128
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/1995/016129
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/1995/016131
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/1995/016132
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/1994/028317
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/1994/023918
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/1994/023209
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/1994/023198
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/1994/021915
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...  
WO/1994/018451
The invention concerns a radial-piston hydraulic motor equipment, which comprises a cam disc (12) of the radial-piston hydraulic motor (10), which cam disc is placed in a stationary position, the piston parts (15a1, 15a2...) and the rela...  
WO/1994/016221
A pressure-applying arrangement in a hydraulic axial piston machine is disclosed, having a pressure plate (7) and a piston (9) that is axially displaceable in a cylinder body (3), is biased by a spring (10) and acts against the pressure ...  
WO/1994/016218
A hydraulic piston machine is proposed, with a cylinder body (1), which comprises at least one cylinder (2) with a piston (3) movable therein, and a control counter-plate (7) which engages the cylinder body (1) by way of a contact surfac...  
WO/1994/016219
A hydraulic axial piston machine is disclosed, with a cylinder drum (2), which has at least one cylinder (3), in which a piston (6) is mounted so as to be axially displaceable, and with a control counter-plate (11) which, on rotation of ...  
WO/1994/015966
Growth differentiation factor-9 (GDF-9) is disclosed along with its polynucleotide sequence and amino acid sequence. Also disclosed are diagnostic and therapeutic methods of using the GDF-9 polypeptide and polynucleotide sequences.  
WO/1994/016224
A hydraulic axial piston machine is disclosed, having an inclined plate (7), on which a slider shoe (9) of at least one piston slides on relative movement between a cylinder body (2) receiving the piston and the inclined plate (7), and a...  
WO/1994/016217
A hydraulic machine with a piston and slider shoe unit (1) is disclosed, in which the piston (2) and the slider shoe (3) are joined to one another by way of a ball-and-socket joint (4) forming a first contact surface, and the slider shoe...  
WO/1994/015097
A device for controlling pressure in a cylinder chamber of a hydraulic pump motor, wherein a piston is inserted into a cylinder bore of a rotatable cylinder block to form a cylinder chamber, and said cylinder block is rotated, whereby a ...  
WO/1994/010452
An engine (1) for driving a piston arrangement (13, 14, 15) for pumping water from an inlet (26) to an outlet (27) at a higher level. The engine (1) includes a hollow housing (2) having an inlet (3) and an outlet (4) between which a liqu...  
WO/1994/008139
A hydraulic pump/motor as a hydraulic pump or hydraulic motor having a rotating type rotor characterized in that a rotor accommodating chamber having a circular cross section is formed in a housing, that a rotor is accommodated in said r...  
WO/1994/007028
A drive unit comprises a piston (11, 13, 15, 17) arranged to execute motion within a cylinder (3, 5, 7, 9). This defines a pressure chamber (19, 21, 23, 25) bounded by part of an internal wall of the cylinder and a face (35, 37, 39, 41) ...  
WO/1994/005912
In order to compensate in an efficient manner the radial and axial forces in a vane cell machine, and at the same time to increase its service life, the vane cell machine for liquids has a slotted rotor (1) mounted in a stator (4), and i...  
WO/1994/004824
A gerotor pump is made of extremely compact axial dimensions by using a shaft (30), which is neither fast with the pump body (10) nor journalled in the pump body (10). This is achieved by making the shaft fast with either or both of the ...  
WO/1993/014327
A hydraulic piston type motor having a rotating piston barrel (28) abutting a fixed porting plate (46) or head with a starting charge device (78) operating to supply a limited hydrostatic pressure between the porting plate (46) and rotat...  
WO/1993/004281
The invention relates to an axial piston motor with an adjustable absorption volume for fitting in a wheel hub, with a motor casing open on one side and closed off by a connection block, a drive shaft fitted so as to rotate in the casing...  
WO/1993/001394
A spring loaded biasing cylinder (100) on one side of an orbiting valve (14) is utilized to seal the orbiting valve to the manifold structure (21) on the opposing side of the valve to eliminate the necessity for physical seals therebetwe...  
WO/1992/021856
A rotary fluid machine including a rotor (2) provided with a plurality of lobes (7), a ring (1) surrounding the rotor and with the lobes defining a plurality of chambers (9), a housing (2) surrounding the ring and provided with a plurali...  
WO/1992/010677
A motor or pump assembly (1) comprises a cylinder block (4) with a plurality of radially positioned cylinders (3), a piston (2) arranged slidably reciprocable in each of the cylinders, a cam ring (7) cooperating with the pistons and bein...  
WO/1992/010676
A motor or pump assembly (1) comprises a cylinder block (4) with a plurality of radially positioned cylinders (3), a piston (2) arranged slidably reciprocable in each of the cylinders, a cam ring (7) cooperating with the pistons and bein...  
WO/1992/008892
The object of the invention is a radial piston eccentric motor/pump, which consists of a ring structure (1') and an axle (7) as an opposing member rotating in relation to it in bearings, a joint ring formed of first joints (13') and set ...  
WO/1992/008049
This gerotor-type hydraulic motor operates at two speeds (low speed, high torque and high speed, low torque) at a given flow rate and pressure of driving hydraulic fluid. It includes first and second rotating power elements disposed alon...  
WO/1992/000455
An adjustable rotor and a radial piston machine which may utilize an adjustable rotor. The rotor has a primary eccentric (2) rotatable with a shaft (1) and a secondary eccentric (3) adjustable in position relative to the primary eccentri...  
WO/1991/018204
A hydraulic drive device, especially for robot arms with several joints, has as the power drive an axial-piston hydraulic motor (13) in which the pressure medium supply is controlled by a follow-up servo valve (14) and there is an electr...  

Matches 451 - 500 out of 2,276