Vane pump

Details Vane pump Vane pump

1992-05-14

1993-08-17

Gluck, Richard E.

Rotary expansible chamber devices

With changeable working chamber magnitude

Spring or fluid biased movable member

418 27, 418 31, 277165, F04C 1504, F03C 200

Patent

active

052363198

ABSTRACT:
A vane pump or a vane motor is here specified, having a variable displacement volume. The vane pump has a vane rotor and an annular stator that surrounds the rotor eccentrically and that is stabilized by means of a piston arrangement for adjusting the eccentricity that determines the displacement volume. The piston arrangement includes at least one pendulum piston that is acted upon by a pressure medium, the pendulum piston being guided in a sealed manner in a housing bore by a piston head that delimits a control space. To simplify the assembly and to decrease manufacturing costs while simultaneously improving the sealing action and increasing the peripheral life of the guide surfaces, plastic rings, which are composed of wear resistant, sliding material, or are prestressed radially, to guide the piston in the piston bore and to seal the control space are embedded, inserted or emplaced in the piston head.

REFERENCES:
patent: 2935365 (1960-05-01), Dega
patent: 3636824 (1972-01-01), Clark
patent: 3918855 (1975-11-01), Bornholdt
patent: 4780069 (1988-10-01), Dantlgraber et al.
patent: 4950137 (1990-08-01), Fischer et al.

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