Title:
HYDRAULIC PUMP/MOTOR
Document Type and Number:
WIPO Patent Application WO/1994/008139
Kind Code:
A1
Abstract:
A hydraulic pump/motor as a hydraulic pump or hydraulic motor having a rotating type rotor characterized in that a rotor accommodating chamber having a circular cross section is formed in a housing, that a rotor is accommodated in said rotor accommodating chamber, that a fluid operation chamber is formed outside said rotor in said rotor accommodating chamber and a shaft member adapted to rotate integrally with said rotor extends outwardly of said housing. A pressure receiving projection is integrally formed on the rotor, and a sealing portion is formed on this pressure receiving projection, the sealing portion being adapted to be brought into sliding contact with the inner circumferential surface of the rotor accommodating chamber in a surface contacting fashion. A vane mechanism is provided in the housing in which a movable partition member is biassed toward the rotor by means of a spring, and furthermore in the housing a supply port and an exit port are formed in positions on the sides of the vane mechanism. A pair of vane mechanisms may be provided in the housing, a plurality of pressure receiving projections may be provided on the rotor, and the movable partition member of each vane mechanism may be constituted by a plurality of members. Moreover, a plurality of the afore-mentioned hydraulic pumps/motors may be arranged in series to form a unit, and a common shaft member may be provided for the plurality of hydraulic pumps/motors.
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Inventors:
OKAMURA TOSHIO (JP)
Application Number:
PCT/JP1993/001413
Publication Date:
April 14, 1994
Filing Date:
September 29, 1993
Export Citation:
Assignee:
OKAMURA TOSHIO (JP)
International Classes:
F03C2/30; F03C1/30; F04C2/356; F04C11/00; F04C27/00; (IPC1-7): F04C2/356; F03C2/00
Foreign References:
| JPS5390008A | 1978-08-08 | |||
| JPS5914990U | 1984-01-30 | |||
| JPS57203895A | 1982-12-14 | |||
| JPS5217908U | 1977-02-08 | |||
| JPS49113203U | 1974-09-27 | |||
| JPS4928725A | 1974-03-14 |
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