Hydraulic control device for operating a sliding selector shaft
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United States of America Patent
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-
Jul 27, 2004
Grant Date -
Feb 21, 2002
app pub date -
Jun 8, 2001
filing date -
Jun 9, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hydraulic control device operates a sliding selector shaft, in particular a gearbox for motor vehicles, with a bore made in a wall of a gearbox housing for accommodating a plastic piston. The piston is actively connected to the sliding selector shaft and delimits a pressure chamber and, under hydraulic pressure, radially guides and axially displaces the sliding selector shaft. The piston has a body and a guide section consisting of plastic. The piston is guided directly at the bore, designed as a non-reinforced and unlined cylinder bore, in the wall of the gearbox housing, consisting of a light metal alloy. This creates control device, which is of a much simpler, and more compact design compared with prior art.
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