Hydrostatic control device, particulary steering device

Details Hydrostatic control device, particulary steering device Hydrostatic control device, particulary steering device

1983-11-10

1986-12-23

Croyle, Carlton R.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Plural working members or chambers

13762521, F03C 208, F16D 3102

Patent

active

046310100

ABSTRACT:
The invention relates to a hydrostatic control device for steering unit device which includes a metering motor and a flat slide directional valve. Slide surfaces of the directional valve are formed by the abutting end faces of an outer housing and a motor housing and between the two slide surfaces there is formed a high pressure zone. Between two end faces of the outer housing and the motor housing opposite thereto is an intermediate pressure zone of larger area which is connected between a first throttle gap associated with the high pressure zone and a second throttle gap leading to the low pressure zone. With the aid of the high pressure zone and the intermediate pressure zone equilibrium can be obtained while incurring only a minimum amount of friction.

REFERENCES:
patent: 4557676 (1985-12-01), Petersen et al.

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