Load relief device for power steering system

Details Load relief device for power steering system Load relief device for power steering system

1980-04-17

1982-10-19

Maslousky, Paul E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Valve locking means

92136, 180148, 91382, F15B 1316, F15B 1522

Patent

active

043544223

ABSTRACT:
A load relief device for a power steering system of a vehicle. The load relief device provides release of loads from a hydraulic pressure supply pump of the power steering system when the output member of the system is near the end of its stroke by short-circuiting between a hydraulic pressure source and an oil reservoir of the power steering system. The load relief device includes an assembly for detecting the end of a stroke being executed by the power steering system, and upon detection of the end of the stroke, the assembly operates to bring a four-way valve of an open center type to a neutral position thereof, regardless of the steering torque being applied to the power steering system.

REFERENCES:
patent: 2218272 (1940-10-01), Wabeke
patent: 2930359 (1960-03-01), MacDuff
patent: 2964017 (1960-12-01), Hruska
patent: 3233408 (1966-02-01), Markert et al.
patent: 3972264 (1976-08-01), Field, Jr. et al.

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