Power-assisted rack-and-pinion steering mechanism

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

1982-11-02

1984-12-11

Peters, Jr., Joseph F.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

74498, 91467, 92136, B62D 312, B62D 508, F15B 910

Patent

active

044872810

ABSTRACT:
Power-assisted rack-and-pinion steering mechanism with a slide-valve which senses the axial thrusts acting on the pinion through a kinematic mechanism with a high transmission ratio, the slide member of the valve consisting of a piston 9 provided with frontal rims 11 and 12 on each end face, cooperating with associated seats formed on the housing, said rims and seats forming varying passages through which the two actuator chambers are connected to the reservoir, means being provided for varying also the communication between the same chambers and the pump, depending on the torque applied to the pinion, piston, seats and housing being so designed that the fluid pressure existing in the operative chamber acts on one or the other piston end face and thus gives the driver the measure of the same pressure.
The system is particularly suitable for a vacuum operated power-steering system which permits a very strong reduction in cost in comparison with a conventional hydraulic power-steering system.

REFERENCES:
patent: 4299302 (1981-11-01), Nishikawa et al.
patent: 4351228 (1982-09-01), Schultz et al.
patent: 4361076 (1982-11-01), Gluck
patent: 4401180 (1983-10-01), Nishikawa et al.

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