Power steering system

Details Power steering system Power steering system

1987-05-28

1989-05-16

Marmor, Charles A.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

91371, 91372, 91420, 180143, B62D 506, B62D 508

Patent

active

048301302

ABSTRACT:
A power steering system for automotive vehicles includes devices for decreasing reaction force and for increasing assisting force applied to the steering wheel in cases where steering operation is performed while the vehicle is stopped. The device comprises a cut-off valve and a bias spring biasing the cut-off valve upwardly. The area of the upper surface of the cut-off valve is larger than that of the lower surface thereof. Therefore, the cut-off valve can move downwardly against the biasing force of the bias spring to block fluid communication between a fluid pressure source and chambers of a power cylinder when fluid pressure exceeding a predetermined value is applied to the upper and lower surfaces of the cut-off valve.

REFERENCES:
patent: 4438827 (1984-03-01), Lang
patent: 4463819 (1984-08-01), Becker
patent: 4665798 (1987-05-01), Bacardit

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