Rotary vane pump with pressure biased flow directing end plate

Details Rotary vane pump with pressure biased flow directing end plate Rotary vane pump with pressure biased flow directing end plate

1981-04-28

1983-11-22

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

418133, F04C 200, F04C 1500

Patent

active

044165986

ABSTRACT:
In a sliding vane type of rotary pump usable for power steering systems a seal of hour glass shape is provided between the flow directing plate, on the outlet side of the vane rotor and the outlet pressure chamber, to confine exposure of the high pressure of the outlet chamber to the downstream side of the plate within a predetermined area only partially balanced by exposure of the upstream side to such high pressure and to also isolate suction passages from the outlet chamber pressure. The result is a flexing of the flow directing plate at the center toward the pump rotor to reduce rotary clearance and permit the use of thinner and lighter weight flow directing plates.

REFERENCES:
patent: 2759423 (1956-08-01), Keel
patent: 2884865 (1959-05-01), Pettibone
patent: 3311064 (1967-03-01), Eichele et al.
patent: 3632238 (1972-01-01), Searle
patent: 3787151 (1974-01-01), Carlson

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