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Patent Searching and Data


Matches 501 - 550 out of 2,278

Document Document Title
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...  
WO/1991/016540
The device is a radial reciprocating engine with a built in synchronizing mechanism, which is designed thus that the two rotating main parts of the machine, the centre shaft (1) and the outer rim (2), by means of two cam rollers (24 and ...  
WO/1991/010831
A fluid motor is disclosed that has a housing with a body portion (10) formed as a hollow circular cylinder. A series of peristaltic tubes (30) are disposed in the housing with one end of each tube leading from an inlet manifold (19) on ...  
WO/1991/005966
Hydraulic circuit for limiting the torque of a hydrostatic hydraulic motor (2) connected in closed circuit to a hydraulic pump (1), which in braking mode operates as a hydraulic pump, in which pressure-control valves (6, 7, 8, 9) are con...  
WO/1990/012970
A hydraulic motor equipped with a reduction gear wherein the lubricating oil in the gear case is cooled to improving the lives of the sealant and the bearing. Said motor is provided with a pair of supply/discharge ports (18, 17) for circ...  
WO/1990/009510
The present invention provides a motor suitable for use in down-hole drilling applications. The motor is a wing motor and comprises a generally tubular casing (1, 2) and a rotor (4) mounted for rotation therein and substantially radially...  
WO/1990/007632
A power conversion machine comprising a rotor assembly having a first rotor part (124) with a first pair of pistons (137, 138) and a second rotor part (125) with a second pair of pistons (135, 136) which are rockable back and forth in re...  
WO/1990/007059
A hydraulic axial piston motor or pump (8) of the type in which a rotor (10) has an odd-numbered plurality of cylinder ports (30) with which the arcuate ports (40, 42) of a port plate (36) successively register. The port plate (36) is pr...  
WO/1990/006443
A machine for converting pressure energy of a fluid into mechanical work comprises a working chamber (27, 28) the volume of which is cyclically variable in response to reciprocatory motion of a wall (20) which defines the working chamber...  
WO/1990/004101
This invention relates to a variable capacitance, oblique spindle type hydraulic machine which supports the reaction of oil pressure acting on a cylinder block (8) by a radial static pressure bearing (23) or by a thrust static pressure b...  
WO/1990/001637
The rotor (18) of an axial piston engine (10) is connected to the engine shaft (16) so as to remain fixed during rotation and during sliding and is supported on the engine housing (91) without play in the axial direction. The cross-secti...  
WO/1989/011593
This invention relates to a main bearing device for the motor of a bent axis type axial piston pump constructed in such a fashion that the sum of a thrust load and a radial load acting on first and second bearings disposed in a tandem ar...  
WO/1989/010487
A roller-blade hydraulic machine comprises a hollow casing (1) with channels (2, 3) for the inlet and outlet of the working medium. The casing (1) is provided with recesses opening toward the hollow of the casing (1), inside which are pl...  
WO/1989/006604
An apparatus for mounting and demounting tyres on to and from a rim, respectively, comprises a device (14) for turning the rim, designed as a pneumatic motor with a rotor and a stator having radially disposed piston and cylinder units an...  
WO/1989/006216
A rotator for crane-mounted working implements comprises a housing (7) swingably connectible with the tip of the crane via a joint, and a pivot shaft (8) connectible with the working implement and pivotal relative to said housing by mean...  
WO/1989/002515
A gearwheel motor has two mutually engaged externally toothed wheels (14, 15) against the side surfaces of which is pressed a sealing plate (26) by means of two approximately concentric compression fields (A, B). The two compression fiel...  
WO/1989/002032
The motor described comprises a casing (1) containing a stack of piston chambers (35) incorporated between a basic piston chamber (2) and a sealing block (3-5). The annular space between the casing and the piston chamber is divided into ...  
WO/1988/009872
Motor apparatus which converts hydraulic energy and change of state expansion energy to mechanical energy. The motor (10) includes a main chamber (32) divided by a piston (34) into a charging chamber (36) and an exhaust chamber (38) duri...  
WO/1988/007133
A variable-capacity hydraulic motor capable of being mounted simply on a power shovel without interfering with or projecting outward from a truck frame, and capable of being manufactured easily. The variable-capacity hydraulic motor (M')...  
WO/1988/003992
A variable-capacity piston machine having a valve plate (3) provided with a high-pressure port (5) and a low-pressure port (6) used to supply and discharge a fluide into and from a piston chamber (80) in a cylinder block (2), and first a...  
WO/1988/001348
The hydromechanical drive consists of three main parts: hydraulic drive cylinders (2), a regulator and a gear box (6). In applying the drive cylinders (2) and the regulator these are showing a completely new principle deviating of all co...  
WO/1987/005972
A piston engine, in particular a radial piston engine, is provided with a housing (1) containing movable pistons (8) and a drive shaft (3) carried on a bearing in said housing. The drive shaft is provided with a second bearing designed a...  
WO/1987/003927
Conventional rotary-vane hydraulic actuators require external pressure sources. The hydraulic actuator (35) disclosed utilizes the centrifugal head developed in its pressure chambers (52, 54) when the entire actuator (35) rotates as a so...  
WO/1986/006787
A high torque, low speed hydraulic motor with radial slots (14) formed in the inner face of a housing forming working chambers; lobed rotors (22) have lobes (23) meshing with each chamber in turn as a drive element, on which the rotors (...  
WO/1986/005554
A hydraulic motor, in which a rotating motion is generated by a combined effect of a cam ring (2) and roller means (6) connected to the pistons (5) of a cylinder group (3). The object is to provide a new dummy coupling solution for a mot...  
WO/1986/004638
Apparatus (20) responsive to fluid pressures and capable of providing fluid under pressure to provide a unit which may selectively be used as a fluid motor or a fluid driven motor pump unit depending upon fluid directing and control stru...  
WO/1986/003547
Unitary cage assembly (52) annularly positioning a plurality of rollers (36) in a pair of roller bearings (32 and 34) supporting a cradle swashplate (24). By utilizing the unitary cage assembly, a parallel relationship between the roller...  
WO/1986/002128
The pinion motor has two pinions which engage on their external sides (14, 15) the shafts of the pinions being supported on both sides in bearings (18 to 21). The bearing elements (19, 21) on one side of the pinions are designed with a l...  
WO/1986/000956
Energy efficient variable displacement motor driven power drive unit using a multi-variable feedback control system to control system output position and speed. More particularly, a variable displacement hydraulic motor (10) connected to...  
WO/1986/000376
The motor is provided with supply pistons (2) axially displaced by an oblique plate (10) with respect to the motor shaft (5), said plate being orientable by a controlling device with respect to a pivoting axis. The pivoting axis (S) is e...  
WO/1986/000377
The pump comprises a cylinder drum (20 converted to a shaft (1) and equipped with pistons (4) fitted in cylinders (3). The piston heads press against the oscillating plate (7) in such a way that the forces of the pistons do not produce o...  
WO/1985/005402
A rotary hydraulic engine (10) having a stationary crankshaft (14) with an eccentric crank portion (16) disposed thereon. A housing (18) is rotatable about the crankshaft (14). At least two pairs of cylinders (20) are connected to the ho...  
WO/1985/004929
Construction of a large-capacity motor constituting a driving mechanism for a rotary system, which is operated at a comparatively low rotational speed, and which requires strong torque, in a large structure. This motor is of the system i...  
WO/1985/003554
New type of piston machine operating as a piston pump or piston engine, preferably called a diagonal engine, which, with the aid of hydrostatic bearings (9, 39), is constructed with the cylinder through-bores (5, 6, 35) having an area fr...  
WO/1984/003330
A rotary blade machine, for example, a blades pump mainly comprising a rotor (1) having outwardly opening, axial slots (3), a blade (7) slidably arranged in each slot and a stator surrounding the rotor with the blades and having inlet an...  
WO/1983/004284
A rotary radial piston pump or motor has a cylinder barrel (13) rotating on a fixed pintle (14) with a fluid exit (9) at the fixed end of the pintle and an inlet (8) at the opposite free end. A fluid impeller (65, 66) boosts the pressure...  
WO/1983/003445
An electro-hydraulic control system for a power drive unit having a wobbler controlled variable displacement hydraulic motor (10) wherein the electro-hydraulic control system causes the displacement of the hydraulic motor to match a load...  
WO/1983/002482
A hydraulic radial piston pump or motor comprises a rotary cylinder unit (20) mounted to rotate on a fixed pintle (25), the unit (20) having radial cylinder bores formed by cylinder sleeves (23) each housing a piston (40) connected by a ...  
WO/1983/001649
A fluid motor operated by a gas or a liquid and having two relatively rotatable parts comprises a plurality of pistons (10) which cooperate with a cam member (1) to produce the rotational output from the motor. The cam member (1) has at ...  
WO/1982/001030
A planetary hydromotor comprises a casing (1) with a stator gear (2) and, mounted inside the casing, a shaft (3) with a gear (4), an annular rotor (11) mounted eccentrically in relation to the shaft (3) and two covers (5 and 6). The shaf...  
WO/1981/000597
In a pump or fluid motor (11, 11a, 11b) having a closed chamber (57) in which cylinders (38) orbit and reciprocate, leakage and cooling fluid which accumulates in the chamber (57) is formed into a rotating annular volume by centrifugal e...  
WO/1981/000287
A radial piston device such as a radial piston motor (10) has a rotor assembly (34) rotatably positioned within a cylindrical race (43) which is movable to a first displacement position by a first piston (52) and a second displacement po...  
WO/1980/001936
A planetary gear mechanism comprising a casing (1) which contains inside at least one kinematic pair with internally-toothed gears. The kinematic pair includes an element (3) having a transient motion in relation to another element (2), ...  
WO/1980/000867
A pumping apparatus for pumping liquids such as slurrys comprises a pumping cylinder/piston (6, 8) driven by the piston/cylinder (16, 18) of an operating device, the supply of fluid under pressure either to an upper port (16a) of the cyl...  
WO/1979/000264
A hydraulic pressure motor with low speed and high torque for applications in mechanical engineering mainly in large-sized equipment, hydrostatic transmissions, and the like. Current hydraulic motors have countless moving components and ...  
WO/1979/000263
A constant displacement reversible hydraulic vane motor capable of being used in power hydraulic systems, hydrostatic transmissions, and the like. In existing motors with vanes mounted in the rotor and inlet and exhaust passages in the h...  
WO/1979/000264
A hydraulic pressure motor with low speed and high torque for applications in mechanical engineering mainly in large-sized equipment, hydrostatic transmissions, and the like. Current hydraulic motors have countless moving components and ...  
JP2014051957
To provide a hydraulic rotary machine capable of restricting abrasion of a bearing rotatably supporting a rotary part.This invention relates to a hydraulic rotary machine using water as working fluid that comprises a rotary part 50 and a...  
JP2014020367
To provide: a new engine which generates rotational power by using environmentally friendly electric energy and has improved performance and a long life span; and new, environmentally friendly oil hydraulic power units that can extrude a...  

Matches 501 - 550 out of 2,278