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Matches 351 - 400 out of 1,378

Document Document Title
JP4410104B2  
JP2010014101A
To provide a multiple vane pump superior in pump efficiency.This multiple vane pump has a switching valve 26 connected by at least one vane pump among a plurality of vane pumps 101 and 102, and switching the supply of a working fluid del...  
JP2010001742A
To provide a variable displacement pump capable of varying the displacement by axially moving an inner rotor and of minimizing loads on the pump and an engine by gradually raising a hydraulic pressure and a drive torque.This variable dis...  
JP2009264109A
To reduce noise and vibration in a work vehicle mounted with a hydraulically driven operating machine.A double gear pump 32 for forcibly feeding hydraulic fluid by engagement/rotation of a pair of gears composed of a drive gear and a dri...  
JP4348850B2  
JP2009236074A
To provide a double gear pump whose components for actualizing the function of controlling the discharge amount of operating liquid in two steps are simplified and built in a body.Operating oil carried by a high pressure gear pump 21 is ...  
JP2009215932A
To provide a tandem pump in which friction and leak are suppressed.A tandem pump includes a first gear section and a second gear section which are rotatingly driven by driving of a rotating shaft, a pump housing section provided in a hou...  
JP4332772B2  
JP2009203811A
To provide a variable displacement type gear pump capable of efficiently recovering energy as a motor and achieving commonization of return passage returning oil to a suction side during low displacement operation as a pump and a return ...  
JP4327579B2  
JP2009197796A
To provide a lubricating pump with reduced number of components, weight and size.The lubricating pump having: a first stage 5 and a second stage 10; the first stage 5 in turn has an intake connectable hydraulically to a tank of lubricati...  
JP2009079572A
To provide a multiple gear pump which has not strict restrictions on mounting it on various liquid pressure machines by suppressing increase of length of a pump main body in a connection direction.As an input side 14a of a driving shaft ...  
JP2009052467A
To provide a gear pump achieving a durability enhancement and reduction of manufacturing cost by parts commonalization, which includes a drive gear rotating shaft and a driven gear rotating shaft supported at portions each having a diffe...  
JP4237438B2  
JP2009030546A
To provide a gear pump implementing operation with a plurality of gear pair simultaneously and mutually meshed without backlash, by eliminating the need of improvement in precision in machining of parts, in a gear pump with multistage st...  
JP4221541B2  
JP4206646B2  
JP2008223755A
To reduce friction while maintaining characteristics identical to pressure characteristics of a common oil pump based on provision of a plurality of discharge sources and a newly devised method of switching oil passages.The device is con...  
JP4154327B2  
JP2008537580A  
JP2008202488A
To reduce friction with keeping equivalent characteristics to pressure characteristics of ordinary oil pumps in a variable flow rate type oil pump having two delivery ports and using three rotors.This device comprises a first delivery pa...  
JP4144343B2  
JP4137361B2  
JP4128221B2  
JP4122398B2  
JP4115548B2  
JP4099337B2  
JP2008512595A  
JP4065721B2  
JP2008045482A
To provide a valve structure for a tandem pump of good operability with a simple structure.When pressure in a main liquid feed passage 5 is lower than non-load operation start pressure, an auxiliary liquid feed passage 6 is connected to ...  
JP4038740B2  
JP4035742B2  
JP4023969B2  
JP4019694B2  
JP2007315211A
To provide a gear pump which can reduce the pulsation of discharge. A piston 40 repeats the reciprocation according to the turning angle of a cam 32. As a result, the volume of a discharge port 27 is varied. The cam curve of the cam 32 i...  
JP4013246B2  
JP4005035B2  
JP3985023B2  
JP3982115B2  
JP2007177687A
To provide a tandem trochoid pump capable of preventing a spacer eccentric to a drive shaft from sliding and rotating with accompanying rotation of each pump structure.In the tandem trochoid pump, the drive shaft 3 transmitting drive for...  
JP3971369B2
To further improve a motor pump unit of a conventional structure with relation to manufacturing cost and necessary space especially. This motor pump unit is provided with at least two internal gear pumps respectively including a small ge...  
JP3960517B2
To provide an oil pump structure in which the influence of the pulsation of oil upon a relief valve is reduced and, thus, the operation of the relief valve is stabilized. In the oil pump structure, a bent part 11 for changing the flow di...  
JP2007125930A
To provide a vehicle brake device equipped with a pump body having structure capable of easily machining a suction port.The suction port 62 is formed by expanding a third central hole 72c formed on a third cylinder 71c to the diameter of...  
JP2007127071A
To effectively prevent wear of a bearing and a shaft end part of a drive shaft in a two stage pressure boosting type internal gear pump even when the same is used for pressurizing a liquid containing a lot of contamination in the liquid ...  
JP3922120B2
To provide a method for manufacturing a tightening joint member, capable of generating a prescribed load by adjusting a position, and realizing time reduction for the position adjustment. This method is to manufacture the tightening join...  
JP3915241B2
To satisfactorily drive pumps in a pump device which has the plural rotational pumps by suppressing flexure of a driving shaft even when high pressure at discharge ports is applied to the driving shaft. In this pump device 100, a rotatio...  
JP3911135B2
To prevent a hydraulic fluid leaking from one hydraulic pump from penetrating into a pump function part of the other hydraulic pump. The pump device comprises one motor 2 disposed in the center, two hydraulic pumps 1 and 3 that sandwich ...  
JP3872104B2  
JP3899785B2
To bleed pump devices in vehicular brake systems of air in appreciable fashion. A drive shaft 54 is arranged in a horizontal position, and a plurality of rotary pumps 10 and 13 are disposed with their discharge openings 61 and 63 and suc...  
JP3876128B2
To provide a device structure in a lubricating device provided with a triple oil pump and its manufacturing method miniaturizing and compactifying an oil pump, shortening an oil pump attaching part size, facilitating assembly work of the...  

Matches 351 - 400 out of 1,378