Dual hydrostatic vehicle steering system

Details Dual hydrostatic vehicle steering system Dual hydrostatic vehicle steering system

2008-04-17

2010-11-23

Winner, Tony H. (Department: 3611)

Motor vehicles

Steering gear

With fluid power assist

C180S442000

Reexamination Certificate

active

07837001

ABSTRACT:
A vehicle including a steering system for moving a pair of wheels supported by a wheel support structure relative to a vehicle structure to achieve steering of the vehicle whilst the vehicle is travelling. The system including a pressure source for providing a supply of pressurized fluid through first and second steering valves to fluid operated first and second actuators, each of which includes an actuating member. The steering valves are operator controlled to provide the pressurized fluid, at least when the steering system is in a first operating mode, from both the first steering valve to the first actuator and from the second steering valve to the second actuator to achieve steering. When the steering system is operating in a second operating mode, only one of the first and second steering valves provides pressurized fluid from the source to a respective one of the actuators to achieve steering.

REFERENCES:
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patent: 4028997 (1977-06-01), Lang
patent: 4184332 (1980-01-01), Liebert
patent: 4257311 (1981-03-01), Barnsley et al.
patent: 4372413 (1983-02-01), Petersen et al.
patent: 4934474 (1990-06-01), Sugasawa
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patent: 6209677 (2001-04-01), Bohner et al.
patent: 6386312 (2002-05-01), Sevelsted
patent: 2001/0004032 (2001-06-01), Zenker et al.
patent: 03047949 (2003-06-01), None

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