Hydraulic power-steering system for automotive vehicles

Details Hydraulic power-steering system for automotive vehicles Hydraulic power-steering system for automotive vehicles

1974-05-15

1976-07-13

Maslousky, Paul E.

Motors: expansible chamber type

With motive fluid valve

Plural separately controlled waste passages for single...

91466, F15B 1108, F15B 13042

Patent

active

039687333

ABSTRACT:
A steering shaft, linked with the dirigible wheels of an automotive vehicle and coupled with a hydraulic servomotor for rotation in either direction under the control of a main valve, has two abutments for alternately opening two normally closed ancillary valves in respective limiting positions of the shaft, these ancillary valves being inserted in branches of two feeder lines extending from the main valve to respective cylinder chambers of the servomotor. Either ancillary valve, when opened, connects one cylinder compartment of a differential valve to the feeder line then under low pressure, the other compartment of that differential valve being connected to a supply conduit whereby a pressure difference is created across a spring-loaded piston in that valve whose two compartments are interconnected by a bleeder line. The piston, upon being displaced by this pressure against its spring force, vents the supply conduit to the low-pressure side of the fluid source to arrest the servomotor.

REFERENCES:
patent: 2986126 (1961-05-01), Werts
patent: 3411416 (1968-11-01), Herd et al.
patent: 3564975 (1971-02-01), Moran

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