Vane pump

Details Vane pump Vane pump

2011-06-07

2011-06-07

Denion, Thomas E (Department: 3748)

Rotary expansible chamber devices

With changeable working chamber magnitude

By adjustably limiting vane or abutment movement

C418S024000, C418S026000, C418S268000, C417S213000

Reexamination Certificate

active

07955062

ABSTRACT:
A vane pump for pumping hydraulic fluid wherein fluid at a pressure intermediate the inlet pressure and the outlet pressure of the pump is supplied to under vane passages of the vanes located in and passing through the rise region of the pump. This assists in preventing damage to the vanes caused by driving the vanes through the protective coating of oil on the wall of the pump chamber when the vanes are travelling through an inlet region of the pump.

REFERENCES:
patent: 3421413 (1969-01-01), Adams et al.
patent: 3586466 (1971-06-01), Erickson
patent: 4260343 (1981-04-01), Watanabe et al.
patent: 5509793 (1996-04-01), Cherry et al.
patent: 6015278 (2000-01-01), Key et al.
patent: 6634865 (2003-10-01), Dalton
patent: 7070399 (2006-07-01), Konishi et al.
patent: 7094044 (2006-08-01), Strueh
patent: WO 95/08047 (1994-09-01), None
International Search Report, mailed Sep. 4, 2006.

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