Steering system including independently operated rear wheel...

Details Steering system including independently operated rear wheel... Steering system including independently operated rear wheel...

B - Operations, Transporting

62

D

138/59

B62D 5/06 (2006.01) B62D 7/15 (2006.01)

Patent

CA 1168555

STEERING SYSTEM INCLUDING INDEPENDENTLY OPERATED REAR WHEEL STEERING MEANS FOR A VEHICLE Abstract of the Disclosure A steering system for a construction vehicle operable to control the position of a pair of front wheels and a pair of rear wheels relative to the frame of the vehicle includes a hydraulic fluid circuit for distributing hydraulic fluid. A hydraulic cylinder is connected to each of the wheels for turning same in a desired manner. A steering wheel is interposed in the hydraulic fluid circuit for selectively directing hydraulic fluid to the cylinders for steering said wheels in a desired direction. A mode selector valve is interposed in the fluid flow circuit between the steering wheel and the cylinders for selectively selecting either four-wheel steer, crab steer, or front-wheel steer mode of steering for said vehicle. A control momentarily overrides the mode selector valve to isolate the rear hydraulic cylinders from the front hydraulic cylinders for permitting independent movement of the rear wheels of the vehicle.

403149

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