Power steering gear mechanism with rotary control valve

Details Power steering gear mechanism with rotary control valve Power steering gear mechanism with rotary control valve

1981-01-30

1983-03-29

Maslousky, Paul E.

Fluid handling

Systems

Multi-way valve unit

91375A, F15B 1316

Patent

active

043780300

ABSTRACT:
A power steering gear mechanism comprising a pinion adapted to be connected drivably to the steering gear linkage for a road vehicle, a pressure cylinder, a double acting piston movable in said cylinder and defining therewith a pair of pressure chambers, said piston being connected to or having formed thereon a gear rack that engages said pinion, a rotary valve mechanism having an internal rotatable valve element connected to a power input shaft, a valve sleeve adapted to be connected and to be rotatable with said pinion, fluid porting in said sleeve for distributing working pressure to either pressure chamber as a result of rotary displacement of said valve element with respect to said valve sleeve, the porting being arranged such that high pressure fluid in the porting establishes on said sleeve a force that urges said sleeve toward said pinion, the low pressure outlet port on said sleeve being situated at the end of said valve sleeve adjacent said pinion.

REFERENCES:
patent: 3022772 (1962-02-01), Zeigler et al.
patent: 3145626 (1964-08-01), Vickers et al.
patent: 3998131 (1976-12-01), Adams
patent: 4063490 (1977-12-01), Duffy

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