Rotary type machine with check valves for relieving internal pre

Details Rotary type machine with check valves for relieving internal pre Rotary type machine with check valves for relieving internal pre

1982-03-29

1984-02-21

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Plural working members or chambers

137860, F03C 222, F04C 222, F04C 1500, F16K 1514

Patent

active

044327102

ABSTRACT:
The invention relates to a hydraulic pump or motor having expansible chamber section at one end thereof, which may be a gerator gear set, and a drive shaft at the other end thereof. A distributor valve having a central bore directs fluid between inlet and outlet ports in the housing and the expansible chamber section. The leakage of pressurized fluid into the central bore of the valve causes certain problems including the problem of directly or indirectly causing destructive forces to be applied to the seal provided between the drive shaft and the housing. This problem is addressed by providing check valve arrangements in the housing between the central bore of the valve and the inlet and outlet ports. The check valves open in the direction of the inlet and outlet ports so that when fluid pressure in the valve bore exceeds the fluid pressure in either of the ports, the pressure in the bore is lowered by fluid being forced outwardly through the port having the lower pressure.

REFERENCES:
patent: 3547564 (1970-12-01), Charlson
patent: 3802012 (1974-04-01), Middleton, Jr.
patent: 3862814 (1975-01-01), Swedberg
patent: 4087215 (1978-05-01), Miller
patent: 4362479 (1982-12-01), Pahl

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