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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...
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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 (...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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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 ...
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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...
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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...
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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...
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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), ...
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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...
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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 ...
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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...
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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 ...
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JP2013015066 |
To provide a swash plate type hydraulic motor or a swash plate type hydraulic pump having a construction with which abrasion/cracking of the swash plate can be prevented, without applying a hardening process such as heat treatment to the...
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JP2013015108 |
To provide a gear pump or a motor that can prevent a large thrust actuation from being applied to lateral plates with a simple structure, in the gear pump or the motor including: a gear pair comprising a driving gear and a driven gear wh...
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JP2013002411 |
To provide a swash plate type hydraulic rotary machine capable of retaining a lubricating oil film between a sliding surface of a swash plate and a shoe and preventing generation of wear and seizure for a long period.In the swash plate t...
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JP2012255357 |
To provide a hydraulic motor or a hydraulic pump that includes a retainer, the strength of which is increased and the thickness of which is made small.The hydraulic motor or the hydraulic pump includes: a case 2; a rotary shaft 3 housed ...
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JP2012251458 |
To provide a double-acting type variable capacity liquid drive engine which is simple in structure, facilitated in assembling work and maintenance work, and changes the amount of a drive liquid.When driven by a prime motor, the phase dif...
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JP2012237214 |
To improve a cooling effect for both of a valve plate side bearing and an output shaft side bearing, and to extend lives of the bearings and an oil seal.The hydraulic motor includes: a front side casing 3; an output rotating shaft whose ...
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JP2012211441 |
To provide a hydraulic and electric hybrid motor in which a hydraulic motor, an electric motor and a speed reducer are arranged on the same axis and a power combining mechanism is made unnecessary, thereby a rise in cost and an increase ...
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JP2012207573 |
To prevent a second swash plate from separating from a bearing metal of a bearing part, in an opposed swash plate type piston pump-motor.This opposed swash plate type piston pump-motor includes a support mechanism 101 for restricting rad...
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JP2012207556 |
To prevent a second swash plate from separating from a bearing metal of a bearing part in an opposed swash plate type piston pump motor.The opposed swash plate type piston pump motor includes: an oscillation link 48 which is swingably su...
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JP2012202298 |
To prevent a second swash plate from being floated from a bearing metal of a bearing part, in an opposed swash plate type piston pump motor.An opposed swash plate type piston pump motor includes: an oscillating link (48) which is oscilla...
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JP2012177347 |
To provide a swash plate-type motor equipped with a cylinder hole structure for a tilting piston, with which abrasion resistance can be increased and the time required for a hardening operation is shortened.Laser hardening is performed i...
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JP2012163081 |
To provide a rotary fluid-pressure system that prevents torque decease and seizure of external tooth member due to an acting force based on the pressure of pressurizing fluid acting axially on the external tooth member.A ring-like intern...
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JP2012132433 |
To provide a reciprocating piston type fluid machine that has a simple conversion mechanism of the reciprocating motion and the rotating motion, and also a simple switching mechanism of fluid supply and discharge.The fluid machine has a ...
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JP2012082747 |
To provide a swash plate type piston pump-motor for simplifying a structure.A piston pump is provided for expanding and contracting a volume chamber by a piston, by reciprocating the piston in response to rotation of a cylinder block by ...
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JP2012077686 |
To prevent cracks of a movable side plate due to repetition of a deflected state and a deflection-eliminated state.A gear pump or a motor includes: a pair of meshed gears; a movable side plate 6 adjacent to a side surface of the gears, h...
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JP2012067749 |
To provide a hydraulic system of a multiple circuit type piston machine having flexibility improved more than a conventional technology, and to provide an energy-saving type hydraulic system for a special purpose.One high pressure connec...
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JP2012057589 |
To lubricate a counterpart member using a drain oil when a hydraulic motor is attached to the counterpart member and to hold the drain oil in a motor housing when the hydraulic motor is detached from the counterpart member.An oil path 38...
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JP2012047277 |
To provide a vane type generator that can be made compact while achieving stable rotation.The generator is so structured that an output shaft as a rotary shaft and an input shaft as a rotary shaft are joined together, and has a ball bear...
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JP2012041978 |
To provide an electro-hydraulic drive system for a work machine, allowing efficient operation by fluid pressure and electricity, the system including a hydraulic motor for driving a structure of the work machine and an electric motor, an...
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JP2012036774 |
To provide a motor-operated hydraulic actuator unit and a hydraulic four-wheel drive working vehicle which are capable of preventing the volume of a hydraulic actuator from being involuntarily changed by an external force applied to a vo...
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JP2012036873 |
To provide a hydraulic motor that strikes a balance between the suppression of slip at a stop and the improvement of start efficiency at a start.A port 100 communicates with an oil chamber 100a facing the right end surface of a valve pla...
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JP2012031758 |
To provide a hydraulic pump motor capable of reducing erosion against a cylinder bore inner wall or a piston generated when an ejection port and a cylinder port are communicated with each other via a commutation hole or the like.In the a...
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JP2012013088 |
To provide an axial-piston machine that continues to keep a function of a brake device when an entrained tooth alignment has a fail.In addition to the entrained tooth alignment provided in a region of a cylinder block collar, additionall...
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JP2012007509 |
To prevent occurrence of scoring/seizure and the like, by inhibiting wear of contacting area between respective cylinder holes of a cylinder block and tapered pistons.On a surface side of a cylinder block 6, a surface treatment layer 15 ...
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JP2012002109 |
To provide a pump motor which can reduce costs and raise assembling properties of a vane, and to provide a driving force distribution device for a vehicle.A vane motor 4 includes: a rotor 8 which is connected to a rear axle shaft not to ...
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