Power steering system

Details Power steering system Power steering system

1975-10-20

1976-11-09

Song, Robert R.

Motor vehicles

Surface effect vehicles

Dynamic seal or fluid curtain

91370, 91375R, 180160, B62D 508

Patent

active

039905349

ABSTRACT:
A vehicle steering system wherein a manual steering gear output controls actuation of a linear hydraulic motor. A control valve, which distributes fluid to and from the boost cylinder, is disposed between the pitman shaft and pitman arm of the manual steering gear. Rotation of the pitman shaft, in response to operator input, causes rotation of the control valve which directs fluid pressure to the hydraulic motor to provide steering assist. The fluid pressure is also directed, through the control valve, to selectively operate on hydraulic reaction members so that a force proportional to steering effort is transmitted back to the operator. A mechanical "overcenter feel" is also provided and has incorporated therewith a mechanical override to provide full manual steering when there is not sufficient fluid pressure to provide hydraulic assist for steering.

REFERENCES:
patent: 1947991 (1934-02-01), Jessup
patent: 2260979 (1941-10-01), Morin et al.
patent: 2369324 (1945-02-01), Thompson
patent: 2440794 (1948-05-01), Bowling
patent: 3576230 (1971-04-01), Taplin et al.

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