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Patent Searching and Data


Matches 501 - 550 out of 2,255

Document Document Title
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 ...  
JP2013253605
To provide a hydrostatic positive displacement machine in which material erosion due to a flow of affecting cavitation of a switching control device and noises caused by the flow affecting the cavitation are reduced by improving such a h...  
JP2013227879
To apply braking to a drive shaft when necessary while ensuring smooth rotation of the drive shaft without decreasing motor efficiency.A bent axis-type axial piston motor allows relative rotation of a separate plate 91 and a friction pla...  
JP2013221431
To prevent oil leaks between a valve plate and a cylinder block more reliably without causing the support ends of a center shaft and the support ends of piston rods to separate from the end face of a drive shaft.A center shaft 90 is equi...  
JP2013221458
To prevent increase in a load of a driving source which drives a pump, with excellent responsiveness, and to effectively decrease energy consumption, in an oil pressure rotary machine.A pump unit includes: a hydraulic pump 74 (82); a ser...  
JP2013209918
To provide a hydraulic motor improved in lubricating performance of a sliding bearing.A hydraulic motor 10 driven by a plurality of hydraulic pistons 12 radially arranged around a crankshaft 11 includes: sliding bearings 13A, 13B that su...  
JP2013204536
To improve mountability of a fluid pressure drive unit.A hydraulic drive unit 100 supplies hydraulic oil to a hydraulic actuator, and drives it. The hydraulic drive unit 100 includes a hydraulic pump 10 that sucks the hydraulic oil and d...  
JP2013204773
To provide a hydrostatic pressure transmission device capable of preventing ingress of any water content in a closed circuit.A hydraulic device (hydrostatic pressure transmission device 1) has a closed circuit for circulating working flu...  
JP2013199837
To easily adjust an inclination angle of a swash plate of a swash plate hydraulic motor.A swash plate hydraulic motor includes a rotating shaft 11 outputting a rotational force, a cylinder block 12 which is rotated together with the rota...  
JP2013185520
To provide a liquid pressure rotary machine capable of further enhancing the anti-wear characteristic and the lubricating performance of sliding surfaces between a cylinder block and a piston, and to provide a method for manufacturing th...  
JP2013181446
To provide a hydraulic device capable of more surely preventing any leakage of working fluid communicating between a side plate end face and a gear end face, preventing abnormal wear in the side plate from occurring, and thereby ensuring...  
JP2013170536
To provide a hydraulic motor with which a casing is sufficiently cooled irrespective of operating conditions.A hydraulic motor (piston motor 1) includes a motor mechanism 40 which operates to rotate by a working fluid fed and discharged ...  
JP2013170537
To provide a hydraulic motor with which a casing is sufficiently cooled irrespective of operating conditions.A hydraulic motor (piston motor 1) includes a motor mechanism 40 which operates to rotate by a working hydraulic pressure led fr...  
JP2013160353
To provide a low-cost and safe hydraulic motor device attaining speedy and efficient mooring and cargo handling in a ship, minimizing power to a load, and reducing CO2 by energy saving without depending on a high-cost VVVF system.A hydra...  
JP2013148042
To provide a power recovery device for boosting low-pressure raw water to a predetermined pressure by switching a flow path valve without requiring external power and using a boosting pump, and to provide a fresh water production plant.I...  
JP2013133741
To provide a hydraulic motor configured to perform opening and closing operation of a supply port on-off valve by the internal pressure of a power unit, which can be started up from a stopping state, and an industrial vehicle such as a f...  
JP2013133703
To start up a hydraulic motor.This hydraulic motor 7 includes a start-up means 15 for rotating a crankshaft, based on a motor starting-up command from a stopped state, in the hydraulic motor 7 including power parts provided plurally corr...  
JP2013124611
To improve reliability by enhancing durability of a bearing arranged between a swash plate support part and a swash plate, and members around it.A plurality of rolling rollers 19 arranged at a position becoming an intermediate part in th...  
JP2013122233
To solve a problem that understanding becomes impossible when there are three or more places that receive fluid pressure.If a pressure receiving part is formed by forming a single piece from a recessed part of a rotor to a rotor protrusi...  
JP2013119780
To provide a hydraulic apparatus capable of ensuring high volumetric efficiency, and maintaining the high volumetric efficiency for a long period of time.A hydraulic apparatus includes a pair of gears 20 with their tooth parts engaged wi...  
JP2013119846
To provide a swash plate motor or a swash plate pump provided with a structure capable of stably holding a swash plate without mounting shoes at a swash plate side end of an tilt control piston.In the swash plate motor 1, a spherical fac...  
JP2013053601
To provide a small uniaxial eccentric screw pump and a fluid motor having high accuracy, and rotatable at high speed.A female screw type stator 20 has an inner peripheral surface defined by a peritrochoid curve, and a male screw type rot...  

Matches 501 - 550 out of 2,255