Hydrostatic control device particularly a steering device

Details Hydrostatic control device particularly a steering device Hydrostatic control device particularly a steering device

1981-05-07

1984-02-21

Garrett, Robert E.

Motors: expansible chamber type

With motive fluid valve

Inlet fluid supplemented by controlled fluid pressurized in...

60384, 60386, 60405, F15B 1518

Patent

active

044322704

ABSTRACT:
The invention relates to a steering control system for a bidirectional servomotor connectable to steerable wheels. The servomotor may be of the differential type in which a rod extending from one side of the piston thereof causes the effective areas on opposite sides of the piston to be unequal. A steering control unit controlled by a steering wheel has two motor ports connected to opposite sides of the servomotor and pump and tank ports connected to pump and tank units. The steering control unit has a metering motor controlled by the steering wheel which meters fluid to and away from only one side of the servomotor. The steering control unit has oppositely acting valves which may be throttle valves for establishing flow paths for opposite steering directions and the neutral condition.

REFERENCES:
patent: 3436915 (1969-04-01), Mercier
patent: 3971214 (1976-07-01), Mercier
patent: 3978879 (1976-09-01), Termansen et al.
patent: 4043419 (1977-08-01), Larson et al.
patent: 4079805 (1978-03-01), Rau
patent: 4221159 (1980-09-01), Liebert
patent: 4253540 (1981-03-01), Berg
patent: 4297845 (1981-11-01), Kyster
patent: 4372413 (1983-02-01), Petersen et al.

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