Drain for internal gear hydraulic device

Details Drain for internal gear hydraulic device Drain for internal gear hydraulic device

1988-04-19

1989-11-21

Croyle, Carlton R.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Plural working members or chambers

418102, F03C 208, F03C 1113

Patent

active

048818801

ABSTRACT:
An improved, high-pressure fluid draining, internal gear hydraulic device of the type having a rotatable valve plate which selectively communicates inlet and outlet ports of a commutator with opening and closing fluid chambers between internal and external gear. The valve plate has radially extending drain ports which drain high pressure fluid from the area inside the valve plate to a check valve system outside the valve plate. This check valve system can drain to a low pressure fluid port of the device such as the inlet or outlet of the pump.

REFERENCES:
patent: 3572983 (1971-03-01), McDermott
patent: 4411607 (1983-10-01), Wustof et al.
patent: 4432710 (1984-02-01), Hansen et al.
patent: 4545748 (1985-10-01), Middlekauff
patent: 4586885 (1986-05-01), Middlekauff
patent: 4699577 (1987-10-01), Dlugokecki et al.
patent: 4762479 (1988-08-01), Uppal

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