Power-assisted rack-and-pinion steering apparatus

Details Power-assisted rack-and-pinion steering apparatus Power-assisted rack-and-pinion steering apparatus

1984-03-09

1986-03-11

Tanner, Harry

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

74388PS, B62D 506

Patent

active

045749078

ABSTRACT:
In a control valve for a power-assisted rack-and-pinion steering apparatus having a slidable member adapted to sense the axial movement of a helical tooth pinion, pre-stressed spring means ensure the return of the slidable member of the valve into its central neutral position, against the friction forces existing in the whole apparatus. These means also avoid intervention of power-assistance below a predetermined value of the torque onto the pinion. In one embodiment of the control valve which operates in connection with a closed center air circuit, means are provided to minimize the friction forces allowing at the same time the use of a simple and inexpensive structure.

REFERENCES:
patent: 2909939 (1959-10-01), Herbenar

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