Motor vehicles – Steering gear – With fluid power assist
Reexamination Certificate
2011-07-19
2011-07-19
Dickson, Paul N (Department: 3611)
Motor vehicles
Steering gear
With fluid power assist
C180S403000, C180S417000
Reexamination Certificate
active
07980354
ABSTRACT:
The invention concerns a hydraulic steering (1) with a supply connection arrangement (P, T), a steering motor (2) and a steering unit (3) between the supply connection arrangement and the steering motor (2), the steering unit (3) having a directional section (4) and a measuring section (5), a steering valve (9) being arranged in parallel to the steering unit (3). With such a steering, it is endeavored to achieve the best possible safety. For this purpose, it is ensured that for each steering direction the directional section (4) comprises a first outlet (A1L, A1R), which is connected to the steering motor (2) by means of a first pipe (23, 24), and a second outlet (A2L, A2R), which is connected to the steering motor (2) by means of a second pipe (25, 26), the first outlet (A1L, A1R) being, in the neutral position of the directional section (4), connected to the measuring section (5), and the first pipe (23, 24) being interruptible by means of a valve arrangement (27, 27a).
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Hansen Niels Bjarne
Porskrog Bendt
Rudolph Tom
Thomsen Svend
Arce Marlon A
Dickson Paul N
McCormick Paulding & Huber LLP
Sauer-Danfoss Aps
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