Electrically operated parking brake apparatus
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United States of America Patent
Stats
-
Dec 2, 2003
Grant Date -
Aug 1, 2002
app pub date -
Jan 24, 2002
filing date -
Jan 26, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrically operated parking brake apparatus that includes an electric motor and a screw mechanism The screw mechanism includes a screw-threaded shaft adapted to be rotationally driven by the electric motor, and a nut member meshing with the screw-threaded shaft, the nut member being movable along the screw-threaded shaft by the rotation of the screw-threaded shaft. The parking brake apparatus also includes a transmission member connected to the nut member for transmitting a brake operating force to a wheel brake, and a rotation preventing unit for preventing the rotation of the screw-threaded shaft so as to hold the brake operating force by fixing the position of the nut member relative to the screw-threaded shaft. The rotation preventing unit in one embodiment is an electromagnetic brake for confining the screw-threaded shaft to a stationary portion of a vehicle body.
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Cited Art Landscape
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