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Patent Searching and Data


Matches 701 - 750 out of 2,276

Document Document Title
JP2008064082
To eliminate a clearance, since the clearance is inevitably formed between a rotor and a rotor frame, and between the rotor and the rotor.A micromotion tip part 1 is formed of two pieces or more, and both rotors are formed in the same sh...  
JP2008057343
To enhance contamination resistance and seizure resistance while increasing sealing effect between a piston and the inside wall of a cylinder.A piston member 31 is swingably connected to one end of a piston rod 32 through a universal joi...  
JP2008057342
To prevent hydraulic oil from leaking out of the connected portion between a cylindrical plate and a cylinder to the outside when the cylinder is slid on the cylindrical plate.The head part 40A of a cylinder 40 is formed in a generally s...  
JP2008057344
To eliminate insufficient rotating force and energy loss even if the pressure and displacement are varied.When a force matching a pressure P in a cylinder oil chamber 4b at the bottom dead center is larger than the spring force of a spri...  
JP2008051118
To make small the size of a bent axis fluid pressure unit wherein a pushing and removing quantity is adjustable.On a flame 12, a fluid pressure module containing one pair of shafts 25, 26 is rotatably supported, two yokes 14 and 16 are p...  
JP2008051072
To smooth a motion when moving a piston in an inside of a cylinder hole while a great load acts thereon, by simple working, and to enhance abrasion resistance or the like.Micro recesses 21 forming a gently sloped face 21a from the deepes...  
JP2007177764
To provide a swash plate piston motor supplying a bearing part of an motor inside with appropriate pressurized oil as lubricating oil.The swash plate piston motor has a concave part 60 opening at a rear side of an output rotary shaft 50 ...  
JP2007170412
To provide a hydraulic turbine of high hydraulic turbine efficiency constructing a runner enclosing a pressure receiving surface body of large flowing water pressure receiving area and a casing composed of a tube having an inner surface ...  
JP2007162534
To keep vibration generated in a drive force transmitting system between a piston and an oscillating plate mutually converting reciprocating motion and rotational motion minimum.The oscillating plate 22 fixed on an oscillating rod 21 and...  
JP3958113
To provide a swash plate type fluid pump/motor capable of preventing pulsation by a working fluid, and having a piston allowing its weight to be reduced and excellent in specific gravity balance. This swash plate type fluid pump/motor is...  
JP3954944
To provide a swash plate angle operating lever for a hydraulic infinite variable speed transmission for operating a swash plate of a hydraulic pump in the hydraulic infinite variable speed transmission having the hydraulic pump and a hyd...  
JP3950614
To provide a gear pump or a gear motor capable of easily inserting a positioning pin into a positioning hole by a nonprofessional, and being assembled with high workability. Inner diameters of first positioning holes 18 and 19 formed on ...  
JP2007107493
To provide a radial piston type fluid rotary machine provided with a shoe capable of surely preventing an edge part of the shoe from biting into a cam surface and scratching on the cam surface.An oil grove 26 is formed on a slide surface...  
JP2007100317
To improve a hydraulic circuit, including a structural change of an feed pump and a revolving motor, so as to increase the efficiency of a hydraulic system, during excavation work in the state of abutment on the lateral surface of a ditc...  
JP2007071030
To serviceably utilize pressure water as power generation energy.This hydraulic power generation system 10 has a driving device 18 driving a generator 16. The driving device 18 has a plurality of piston-cylinder mechanisms 24A to 24D dri...  
JP2007071195
To solve a problem wherein fluid pressure receiving area is constrained in radius dimension of a rotor main body, because a sinking position of a vane body attached to a rotor or an oscillating part after action depends on a system chang...  
JP2007056685
To easily manufacture a swash plate capable of tiltably operating a variable displacement hydraulic motor.The rear surface 32 of the swash plate 30 is formed in a stepped surface with steps 34 and 35. A pair of rear surface portions 32a,...  
JP3915223
To reduce a noise and a vibration by reducing the pressure variation width of the oil enclosed in filing space, without hurting the compact property, in a gear pump or a motor. In a gears 1 respectively, an additional machining is applie...  
JP3913399
To improve performance of an oscillation type hydraulic pressure equipment by providing a simply-configured vane assembled body, which is composed of a rotor shaft and a vane with satisfactory dimensional accuracy and assembling accuracy...  
JP3913920
To improve the workability of assembling and to miniaturize a device by using the components of a tilting and rotating actuator in common and reducing the number of part items. The casing main body 2 of a casing 1 is provided with one ti...  
JP3909444
To position an overlapping part of an annular pressure chamber with adjoining fluid port of spider form in the proximity of the overlapping part of the fluid port of spider form with static valve passage to provide more desirable axial p...  
JP3911211
To provide a hydraulic motor capable of certainly eliminating the friction resistance of a brake disc when the brake is disengaged. The hydraulic motor 1 is composed of a plurality of pistons 6 reciprocating with liquid pressure, a cylin...  
JP3909988
To prevent erosion of a valve plate in a rotary swash plate type piston pump. In the rotary swash plate type piston pump wherein a surface layer which is brought into slide contact with a cylinder block is formed of a material having a h...  
JP2007023927
To provide an installation structure for a swash plate support stand inhibiting looseness of the swash plate support stand and enabling to easily attach and detach the swash plate support stand on and from a casing.The casing 6 of a pist...  
JP2007022197
To provide a wheel motor device capable of directing a hydraulic oil port and an oil port to proper directions respectively, in a wheel motor device with a hydraulic motor unit having a motor housing provided with the hydraulic oil port,...  
JP2007009801
To miniaturize a hydraulic motor by providing a spring for a brake pressing a brake piston against a flange at an outside of a swash plate and a rotation stopping pin of the brake piston on a same circumference.A plurality of spring hole...  
JP3894253
To provide a brake energy regeneration device which realizes the high speed of the rotation frequency in the pump operating time of a hydraulic pump/motor, and realizes the small type and the light weight of the hydraulic pump/motor. In ...  
JP3894463
To surely prevent the proximal end of a piston from being separated out of a piston shoe while allowing them to slightly slide, relative to each other. A thread part 20A on the distal end side of a connection rod 20 is fastened in a thro...  
JP2006336561
To provide a variable capacity type swash plate type pump-motor capable of preventing running-out of oil in a contact part accompanying with sliding of a control member for controlling tilting rotation of a swash plate and letting air mi...  
JP3889588
To provide a variable displacement type hydraulic rotary machine capable of stably holding its swash plate in the maximum and the minimum tilting position and allowing enhancement of the processing easiness. The hydraulic rotary machine ...  
JP3889592
To shorten an axial dimension of a casing and to simplify a drilling process of an oil passage for supplying oil liquid. Inclined rotation support members 24, 40 are fitted into fitting recess parts 6, 8 of a rear casing 5 and a front ca...  
JP2006329093
To provide a power generating device capable of generating power efficiently and having the appearance protruding not from a running passage.This power generating device is provided with a seesaw 1 provided with a shaft 2 provided in the...  
JP3880755
To provide a small electric hydraulic servomotor. In the electric hydraulic servomotor 100 for rotating an output shaft 61 according to a rotating speed difference between a rotary shaft 41 and an output shaft 61, a longitudinal groove 7...  
JP3877307
To provide a pressure oil energy recovery device of such a structure that the displacement of a hydraulic motor fed with the returning pressure oil is controlled and stable operating performance of a working machine is established. The p...  
JP2006266176
To provide a hydraulic motor device with a reduction gear utilizing working fluid lubricating the hydraulic motor for lubricating a reduction gear and suppressing enlargement of a casing of the hydraulic motor.The device is used as a sle...  
JP2006266090
To reduce or suppress vibration and noise by properly discharging an excess working fluid while an entrapped area is compressed.In this gear pump, a high-pressure side relief groove 41 is formed on the inner surface of a member 4 that ad...  
JP2006233972
To provide a hydraulic multi-stroke type axial piston machine capable of increasing output and enlarging the range of use with a simple construction.Rollers 14 are provided as rolling elements, the rollers are disposed in cutout parts A ...  
JP3846758
To miniaturize the whole of a radial piston motor by miniaturizing a brake device. In the brake device of a radial piston motor, a radial piston motor comprises a motor case 3, which is rotatably provided on the external peripheral face ...  
JP2006226139
To provide a jig for assembling a coil spring by which a compression coil spring can be surely assembled even in a hydraulic motor with brake whose motor cover is thin.The jig for assembling a coil spring is equipped with a spring retain...  
JP2006220306
To provide an electric hydraulic motor capable of avoiding that a return oil passage becomes very high pressure.The electric hydraulic motor is connected to a hydraulic actuator for revolving an output shaft 21 by the working oil pressur...  
JP2006214381
To provide a rotary piston device easy to start to easily obtain rotating force even in the low-pressure condition and even in the low-flowing-speed condition by providing a means remarkably effective to exchange fluid force to rotation ...  
JP2006214356
To provide a multistage-piston type fixed displacement axial piston pump and its motor, which is compact, and whose pulsation can be reduced by changing the shape of a piston and a cylinder block hardly increasing the number of parts, an...  
JP2006207493
To provide an inclined shaft type variable displacement pump motor positively detecting position of a tilt angle control piston with simple constitution without requiring a new stroke length for detecting the position of the tilt angle c...  
JP2006207501
To provide a hydraulic piston rotating machine preventing the occurrence of erosion of a casing surface with which back flow of high pressure oil from a cylinder port collides, and moreover preventing the formation of bubbles, pulsation ...  
JP3827655
To provide a non-circular gear that reduces the change in an engagement pressure angle, is advantageous for setting the tool pressure angle of an engagement teeth surface, can reduce the number of teeth without forming an overhang sectio...  
JP3825972
To restrict the rotation of a drive member by a rational structure, and to reduce a manufacturing cost. In this hydraulic pump motor 100 having a rotary casing 115 rotatably arranged on a fixed casing 101, an internal teeth member 106 fi...  
JP2006170422
To provide a high output type multistage hydraulic device with hydraulic pumps and hydraulic motors integrated for driving a working machine which requires high output for driving a self energy generating hydraulic driven generator, with...  
JP2006170125
To obtain smooth operability even in inertia rotation in a hydraulic motor.In the hydraulic motor provided with a piston mechanism reciprocating a piston by supplied pressurized working fluid and rotating an output shaft, supply and disc...  
JP3818175
To reduce mechanical loss of a radial type fluid machine such as an expander. A plunger sliding axis CLp is shifted from the rotational center of a rotating cylinder 12. As a result, when refrigerant flowing into a working chamber 12b ap...  
JP2006161753
To make it possible to always perform proper lubrication and cooling etc. for a reduction gear.A part of pressure oil (a pressure oil signal for tipping) for tipping flowing through an oil passage 17 for tipping is introduced as lubricat...  

Matches 701 - 750 out of 2,276