Steering system for vehicle with four drive wheels

Details Steering system for vehicle with four drive wheels Steering system for vehicle with four drive wheels

2005-01-11

2005-01-11

Morris, Lesley D. (Department: 3611)

Motor vehicles

Having four wheels driven

Including pump and fluid motor, or generator and electric...

C180S006260, C180S307000, C180S248000

Reexamination Certificate

active

06840345

ABSTRACT:
Steering system for vehicles comprises a frame with a front axle and a rear axle, at least one of these carrying two steered wheels, the wheels of each axle being driven by a hydraulic motor via a differential unit, the steered wheels being connected, for steering control, to a cylinder-piston unit fed by a usual power steering device, in which at least the hydraulic motor associated with one axle is of variable piston displacement, and is associated with piston displacement adjustment means governed by the position of the cylinder of the cylinder-piston unit which controls the steering.

REFERENCES:
patent: 3815698 (1974-06-01), Reed
patent: 3978937 (1976-09-01), Chichester et al.
patent: 5899292 (1999-05-01), Paul et al.
patent: 6109384 (2000-08-01), Bromley et al.

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