Rotary expansible chamber devices – Working member has planetary or planetating movement – Plural working members or chambers
Patent
1993-06-09
1994-07-12
Bertsch, Richard A.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Plural working members or chambers
418132, 418133, F04C 300
Patent
active
053283430
ABSTRACT:
A gerotor motor (11) of the valve-in in-star type is provided wherein a stationary valve member (17) is disposed immediately adjacent the gerotor gear set (19). The stationary valve member defines a shuttle bore (81) and disposed therein is a shuttle member (107) which moves between two operating positions (FIGS. 6 and 7) under the influence of system pressure. The shuttle valve member (107) communicates system pressure from whichever of the ports (39 or 41) is at high pressure to a pressure balancing recess (63). At the same time, the shuttle valve (107) provides fluid communication between whichever of the ports is at low pressure and a low pressure passage (83) which may be in communication with a lubrication circuit (95), or may be in communication with a case drain port, to divert a small amount of fluid to a heat exchanger. The invention provides a very small shuttle valve arrangement comprising only a single part, and eliminating a substantial amount of the machining previously required in the motor endcap (15).
REFERENCES:
patent: 3338257 (1967-08-01), Ferguson
patent: 3734132 (1973-05-01), Kuhnelt
patent: 3863449 (1975-02-01), White, Jr.
patent: 4343601 (1982-08-01), Thorson
patent: 4696161 (1987-09-01), Rasmussen et al.
patent: 4762479 (1988-08-01), Uppal
patent: 4976594 (1990-12-01), Bernstrom
Bernstrom Marvin
Flaschenriem Marvin
Johnson Oliver
Uppal Sohan
Bertsch Richard A.
Eaton Corporation
Freay Charles G.
Kasper L. J.
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