Motor vehicles – Steering gear – With fluid power assist
Reexamination Certificate
2007-12-11
2007-12-11
Winner, Tony (Department: 3611)
Motor vehicles
Steering gear
With fluid power assist
C180S442000
Reexamination Certificate
active
10512541
ABSTRACT:
A hydraulic steering apparatus with steering amount amplification is provided, wherein a metering device for supplying pressure medium to steering cylinders is actuated in accordance with an amount of rotation of the steering wheel. With the aid of a control block it is possible to deliver an additional pressure medium volume to the steering cylinders, wherein control of the control block is effected through the intermediary of a control circuit containing an effective control pressure that is substantially lower than the load pressure for transmitting the steering moment at the steering cylinder. A spring assembly for the control block is also provided, wherein two springs are arranged in parallel, one of which only takes effect following a predetermined stroke of the control element.
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Bergmann Erhard
Bollero Vincenzo Domenico
Harnischfeger Edwin
Scandella Walter
Bosch Rexroth AG
Oliff & Berridg,e PLC
Winner Tony
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