Driveline vehicle parking brake actuator
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United States of America Patent
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-
Jun 7, 2005
Grant Date -
Jun 17, 2004
app pub date -
Dec 13, 2002
filing date -
Dec 13, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A driveline vehicle parking brake actuator including a reciprocable piston, a spring guide having a tubular distal portion telescopically received on the piston and a radial proximal portion which is telescopically supported within the housing by an annular wear guide, and nested cylindrical coil springs including an outer cylindrical coil spring biased between the housing and the radial portion of the spring guide and a nested inner coil spring having a greater spring rate biased between the spring guide and the piston functioning in series. The distal end of the piston is attached to a cable and the springs are compressed by hydraulic or pneumatic pressure acting against the piston.
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Family
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