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JP05202878 |
PURPOSE: To guarantee silent and balanced rotation of a main shaft and reduce magnetic attraction, gap higher harmonies and vibrational noise in a motor. CONSTITUTION: A rotary compressor comprises a motor, a main shaft 5 connected rotat...
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JP05195963 |
PURPOSE: To provide a double vane pump preventing the generation of cavitation in a common passage so as to enable the high-speed rotation of the pump and also preventing the lowering of pump durability at the time of increasing the rota...
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JP05133348 |
PURPOSE: To obtain a pressure energy translating device with a simple structure, useful in a pump or a fuel system by providing a pressure contained vane unit assembly comprising a pair of support plates, a cam ring, a rotor having a plu...
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JP05079472 |
PURPOSE: To provide a variable capacity pump which is more favorable in terms of the space and cost than a conventional pump, and the capacity of which is variable. CONSTITUTION: A drive shaft 2 to which a plurality of gears 4-8a are fix...
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JP05071475 |
PURPOSE: To provide a positive displacement pump capable of reducing torque fluctuation through a rotor phase difference of 60 degrees by using a shaft made of a solid metal material and a multistage three-lobe rotor. CONSTITUTION: A pos...
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JP04353284 |
PURPOSE: To reduce a thrust load applied on a bearing by making a set of two compression units, connecting rotors of the compression units of each set to a common drive mechanism and constituting them to supply pressure oil to a space be...
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JP04347383 |
PURPOSE: To miniaturize a joint, namely, a pump mechanism as a whole by reducing a burden to be imposed on the first joint, in a multiple gear pump mechanism. CONSTITUTION: This gear pump mechanism is of a triple structure connecting thr...
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JP04321783 |
PURPOSE: To easily and certainly solve the problem of lubrication defect of an intermediate joint. CONSTITUTION: A spline connecting part 31 is lubricated in such manner that a low pressure side communicating passage 27a is kept opened i...
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JP04303190 |
PURPOSE: To simplify machining for forming a spline coupling portion while effectively keeping the smoothing effect of pulsation rate and simultaneously serve the convenience in strength design. CONSTITUTION: Each number of teeth of driv...
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JP04265484 |
PURPOSE: To prevent seizure by making the plate thickness of the first vane which is held by the first rotor, smaller than that of the second vane which is held by the second rotor. CONSTITUTION: The plate thickness of the first vane 37 ...
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JP04262081 |
PURPOSE: To provide a fluid pump capable of controlling the discharge flow with a simple structure. CONSTITUTION: Gaps 39, 41, 67, 69 are formed on at least one of both sides in the axial direction of rotors 25, 57 of a front pump P1 and...
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JP04252885 |
PURPOSE: To abate the discharge pressure pulsation of a positive displacement type rotary pump as well as to reduce the extent of noise attribute to the pressure pulsation. CONSTITUTION: A pump part 30 is provided with both trochoidal fi...
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JP04234588 |
PURPOSE: To provide a dual capacity pump which has a simple structure and which can reduce the manufacturing cost, by incorporating two constant volume pump-up elements each of which is commonly provided with a one-way flow valve and a f...
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JP04231688 |
PURPOSE: To provide a gerotor pump of inexpensive manufacturing and assemblying costs and capable of reducing pressure pulsation to a lower value than the same kind of conventional pumps. CONSTITUTION: A plurality of pump chambers of var...
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JP04178143 |
PURPOSE: To attain driving excellent in synchronization without using a drive transmitting device by arranging magnetic pole surfaces of fellow rotors, brought into contact or opposed approximately, in a stator, in which an armature is p...
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JP04109089 |
PURPOSE: To improve the capacity of compressing the gas phase by providing a vane pump for discharging the gas phase and the liquid phase into a casing after compressing the gas-liquid two-phase flow, and a gear pump for compressing the ...
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JP04096641 |
PURPOSE: To conduct force-feeding of oil through a pump and cooling of a motor simultaneously by housing the motor and pump part in the same case and by causing the oil to pass through the motor part. CONSTITUTION: When power is applied ...
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JP04027785 |
PURPOSE: To make a center plate thin by communicating branch passages formed on both sides of the center plate to a feed port, and communicating them to suction passages of a front pump and a rear pump. CONSTITUTION: A front pump P1 and ...
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JP03281995 |
PURPOSE: To realize a compact size by composing a high pressure side chamber in a single chamber, while making an intermediate plate provided between a pair of cam rings function as the pressure plate of one side cam ring and the thrust ...
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JP03271578 |
PURPOSE: To drive hydraulic equipments, of which working pressure and flowing quantity is different from each other, with one two-stage vane pump by setting a discharge flow quantity of a first-stage rotor larger than an inlet flow quant...
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JP03258984 |
PURPOSE: To enhance the miniaturization and reduction in noise by conforming the discharge directions to release the discharge flows from first and second compression chambers into a single muffler. CONSTITUTION: A first cylinder 31 form...
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JP03217674 |
PURPOSE: To prevent the sacrifice of the efficiency of a pump unit or the mechanical completeness of the whole pump design by mounting spacer means on a journal portion and axially positioning the vane of a middle pump unit between the j...
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JP03011177 |
PURPOSE: To keep a large capacity pump and a small capacity pump always in a proper oil suction state by installing an opening degree adjusting means for an oil passage midway in the oil passage which leads to at least one between the la...
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JP02308963 |
PURPOSE: To keep pump vibration and out-of-balance from being transmitted to the pump housing of a fuel tank supporting body by mounting one end of a rotary pump shaft on one end of a flexible spindle and accommodating the spindle in an ...
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JP02245485 |
PURPOSE: To increase the containment capacity by making first inner teeth and first outer teeth differ by one in the number of teeth, making second outer teeth and second outer teeth differ by at least two in the number of teeth, and con...
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JP02227548 |
PURPOSE: To facilitate the assembly by arranging a rotary axial line of a toothed ring having an inner tooth of a pump coaxially for a rotary axial line of a motor in a fuel conveyance device in which the drive motor and the conveyance p...
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JP02221692 |
PURPOSE: To prevent hydraulic pressure and abnormal rise of the hydraulic pressure by providing a main pump and a sub pump the rotor axes of which make contact with and part from each other in accordance with the magnitude of a discharge...
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JP02196176 |
PURPOSE: To aim at the uniformization of oil levels in each oil separator by installing each overflow port in a proper oile-level height position of these oil separators, and connecting each port to a low pressure part, in a device which...
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JP02185682 |
PURPOSE: To shorten axial length by journalling a rotor directly or indirectly on a shaft while fixing the shaft in a pump body. CONSTITUTION: A shaft 18 is fixed in a main body 10, for example, by press in, bushes 20, 22 are arranged, a...
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JP02171386 |
PURPOSE: To obtain the function of an unloading valve in a simple structure by forming a gap between the outer surface of a spool and the inner surface of a valve hole, and thereby making it possible that oil within a chamber to which pr...
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JP02153281 |
PURPOSE: To enable constantly optimum circulation of oil by a method wherein a main inner rotor and a drive magnet body are secured on a drive shaft pivotally supported in a casing having a main and auxiliary rotor chambers and the drive...
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JP02023283 |
PURPOSE: To ensure a necessary amount of oil delivered during high speed running by a method wherein the high oil pressure spaces of trochoidal pumps are intercommunicated in series, and an oil suction passage is connected in parallel to...
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JP02009991 |
PURPOSE: To reduce troubles and damages by increasing the pressure in a center circular area higher than sleeve inner pressure with a means that injects pressure liquid to a suction chamber of a turbine, and lubricating the interval betw...
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JP01310186 |
PURPOSE: To pressurize efficiently a small flow of liquid, by providing a rotor having an axial flow passage, within a pipe-shaped can body fixed within a stator generating a rotary magnetic field. CONSTITUTION: At the upper part of a pu...
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JP01305179 |
PURPOSE: To reduce a clearance between slide surfaces without generating a scuffing and reduce wear of bearings by providing both main and sub pumps rotating in contra directions with respect to each other, and arranging a rotary port pl...
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JP01277690 |
PURPOSE: To divide a discharge quantity into plural numbers of parts accurately by constituting an intermediate shaft bearing, supporting each of driving an driven shafts of a gear, to be shiftable as far as the specified range in the ax...
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JP01195985 |
PURPOSE: To reduce the number of constituent parts of a tandem pump in comparison with the conventional one by feeding working oil used to drive two actuators to these actuators simultaneously from a single vane pump. CONSTITUTION: The p...
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JP01177478 |
PURPOSE: To provide an increased life for a rotary shaft and a bearing, by a method wherein pump parts in a 2-stage are connected on a rotary shaft, the suction port and the delivery port of each of the pump parts are positioned facing e...
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JP01119336 |
PURPOSE: To ejection a high viscosity fluid at high pressure by providing an extraction screw on a gear shaft of a gear pump, reducing the installation size of the gear pump on a tank due to said extraction screw, and using the boosting ...
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JP01116372 |
PURPOSE: To outwardly discharge chips produced by a tooth profile portion at the time of press fitting by press fitting a stater shaft from the side of housing oil pump rotating elements of a casing toward the outside while providing a t...
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JP01104989 |
PURPOSE: To eliminate the pulsation of the output of a pump so as to supply solvent by at an accurate flow rate providing a control means for regulating the stroke length of the first piston and the second piston in a pump device for sup...
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JP01077778 |
PURPOSE: To obtain a compact double combination pump by arranging two sets of pump mechanisms with line symmetry in a pump casing, making opposing gear trains mesh with each other, and making one gear a drive side while making other thre...
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JP01060790 |
PURPOSE: To intensify a supercharging effect by providing a sub-intake path affording communication between an intake path and a bypass path in the proximity of an opening of a valve receiving hole for receiving a flow regulating valve. ...
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JP01024189 |
PURPOSE: To make it possible to control the discharge amount of a pump and to minimize the power loss by arranging plural rotors in parallel, furnishing a suction passage and an injection passage to each rotor, and providing a back flow ...
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JP01024188 |
PURPOSE: To increase the torque of a motor by arranging an inner suction aperture and an inner injection aperture to an outer gear and an inner gear, furnishing vanes to the outer periphery of the pump outer gear, and making the motor in...
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JP63302190 |
PURPOSE: To enable reduction of pulsation of mortar, delivered through the delivery port of an upper pump, to a very low value, by a method wherein the delivery port of a lower squeeze pump is connected, as one faces a delivery direction...
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JP63106384 |
PURPOSE: To prevent the generation of suction shortage even if the fluid which flows through one suction passage into two pump elements by forming a suction introducing passage which communicates to each bypass passage of two pump elemen...
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JP63080085 |
PURPOSE: To obtain an efficient pump, by employing an internal gear in main section of a pump thereby forming an internal gear pump at the inside thereof and a vane pump at the outside thereof. CONSTITUTION: Main section of a pump is con...
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JP63068787 |
PURPOSE: To prevent a hydraulic fluid being used in each unit from being mixed as well as to make the hydraulic fluid separately usable for each unit, by installing an oil seal between two pump units set up in series inside a housing. CO...
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JP63068788 |
PURPOSE: To obtain a supercharging character along an overall operation range utilizing the fluid in a suction chamber by crossing respective outflow ends of an inlet passage and a bypass passage with each other to be connected to the su...
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