Hydraulic servo steering system

Details Hydraulic servo steering system Hydraulic servo steering system

B - Operations, Transporting

62

D

138/57

B62D 5/08 (2006.01) B62D 5/09 (2006.01) B62D 5/32 (2006.01)

Patent

CA 1141262

Hydraulic Servo Steering System Abstract A hydraulic servo steering system for vehicles has a steering valve for directing fluid to steering cylinders in response to pilot fluid directed to one end of the steering valve from a hand metering unit. A servo cylinder directs a volume of fluid to the other end of the steering valve sufficient for returning the steering valve to its centered position in response to turning of the vehicle. A pair of pilot operated check valves positioned in the lines between the servo cylinder and the steering valve are opened in response to fluid pressure being established in the lines by a means. Should one of the lines rupture, the resultant drop in fluid pressure in the lines causes the check valves to close thereby isolating the steering valve from the ruptured lines. Thereafter the steering valve can be operated in a "jerk steer" manner for emergency steering of the vehicle.

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