Rotary fluid pressure device and lubrication circuit therefor

Details Rotary fluid pressure device and lubrication circuit therefor Rotary fluid pressure device and lubrication circuit therefor

1981-03-25

1982-12-07

Lall, P. S.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Plural working members or chambers

418 87, 418102, F01C 102

Patent

active

043624790

ABSTRACT:
A rotary fluid pressure device is disclosed of the type utilizing a gerotor gear set (13) and an output shaft assembly (45) including a spool valve (49). The device includes a housing (11) defining inlet and outlet ports (21 and 23). The spool valve and housing cooperate to define a lubrication fluid chamber (59). Torque is transmitted from the gerotor set to the output shaft by a dogbone shaft (61) having a rearward spline connection (65, 69) to the gerotor, and a forward spline connection (63, 67) to the output shaft. The spool valve defines a pair of annular grooves (71, 73) in communication with the ports and a pair of check valve assemblies (91, 93) to permit flow of lubrication fluid from the lubrication chamber into whichever of the annular grooves is in communication with the outlet port. The resulting lubrication circuit insures a good flow of lubrication through both of the spline connections, in either direction of operation of the device, and further insures that contamination particles are carried from the spline connections to the outlet port without having to pass through severe flow restrictions which can trap such particles.

REFERENCES:
patent: Re28441 (1975-06-01), Easton
patent: 3107493 (1963-10-01), Huber
patent: 3286645 (1966-11-01), Albers
patent: 3532447 (1970-10-01), Charlson
patent: 3606598 (1971-09-01), Albers
patent: 4159723 (1979-07-01), Baatrup et al.
patent: 4171938 (1979-10-01), Pahl
patent: 4199305 (1980-04-01), Pareja

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