Hydrostatic controller wherein the control valve spool includes

Details Hydrostatic controller wherein the control valve spool includes Hydrostatic controller wherein the control valve spool includes

1974-03-22

1976-02-10

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Plural working members or chambers

F01C 102, F04C 102

Patent

active

039376010

ABSTRACT:
The present invention relates to a hydrostatic controller for controlling fluid flow to a device such as a steering cylinder for a vehicle. The controller comprises a gerotor gearset. The gerotor gearset includes a rotor and a stator which define expanding and contracting fluid pockets upon relative rotational and orbital movement therebetween. A control valve forms a part of the hydrostatic controller and the control valve includes a valve spool which is movable upon an input signal thereto to direct fluid to the device which is controlled by the hydrostatic controller and to receive return fluid from that device. In addition, the control valve spool in cooperation with the housing therefor functions as the commutator valve for the gerotor gearset for directing fluid to and from the expanding and contracting pockets of the gerotor gearset.

REFERENCES:
patent: 3348493 (1967-10-01), Easton
patent: 3385057 (1968-05-01), Pruvot et al.
patent: 3564848 (1971-02-01), Baatrup et al.
patent: 3584985 (1971-06-01), Baatrup

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