Motor vehicles – Steering gear – No mechanical connection between steering shaft and steering...
Reexamination Certificate
2005-08-02
2005-08-02
Hurley, Kevin (Department: 3611)
Motor vehicles
Steering gear
No mechanical connection between steering shaft and steering...
Reexamination Certificate
active
06923289
ABSTRACT:
A closed-circuit pump is provided that receives input from a steering unit in order to drive a steering cylinder. The closed-circuit pump is preferably a proportional bi-directional pump. The steering unit includes a steering wheel or similar device controlled by an operator. In one embodiment, the steering unit is a conventional hydraulic system that includes a servo pump. In another embodiment, the steering unit is an electronic displacement control system. The steering cylinder engages with a steering assembly to perform the steering function by physically turning the wheels of the vehicle. The inlet of the steering cylinder includes a counterbalance valve, which prevents flow into the steering cylinder when there is no steering input from the operator.
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MacLeod Ian J. C.
Sporrer Rick J.
Hurley Kevin
Sauer-Danfoss Inc.
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