Rotary expansible chamber devices – Working member has planetary or planetating movement – Adjustable or resiliently biased working member
Patent
1986-01-28
1987-12-29
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Adjustable or resiliently biased working member
418 61B, 418133, 418186, F01C 110, F01C 2114, F03C 208
Patent
active
047157984
ABSTRACT:
A rotary fluid pressure device is disclosed of the type including a gerotor gear set including a ring member (19) and a star member (23). Both manifold valving and commutator valving are accomplished at an interface between an end surface (42) of the star (23) and an end surface (41) of an endcap member (17). The endcap (17) defines three concentric pressure chambers (43), (51) and (47), and the star defines three concentric manifold zones (63), (67), and (65) which are in continuous communication with the pressure chambers (43), (51) and (47), respectively. The various manifold zones (63), (67), and (65) defined by the star communicate with fluid ports (69), (77) and (73), respectively which are also defined by the end surface (b 42) of the star (23). A valve spool (97) is selectively operable between a first condition providing communication between the manifold zones (63) and ( 67) to achieve a low-speed, high-torque (LSHT) mode of operation, and a second condition providing communication between the manifold zones (67) and (65) to achieve a high-speed, low-torque (HSLT) mode of operation.
REFERENCES:
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patent: 3490383 (1970-01-01), Parrett
patent: 3825376 (1974-07-01), Petersen et al.
patent: 3894821 (1975-07-01), White, Jr.
patent: 4411606 (1983-10-01), Miller
patent: 4474544 (1984-10-01), White, Jr.
patent: 4480971 (1984-11-01), Swedberg
Eaton Corporation
Kasper L. J.
Rowe D. A.
Vrablik John J.
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