Parking brake system
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United States of America Patent
Stats
-
Aug 24, 2010
Grant Date -
Aug 23, 2007
app pub date -
Mar 30, 2005
filing date -
Mar 31, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A parking brake system is provided in which a parking brake state is obtained by forward movement of a parking piston in response to the action of a parking control fluid pressure, and a forward operating state of the parking piston is mechanically locked by a lock mechanism. Moreover, an input member of a brake mechanism and the parking piston are connected by a coupling linkage. A lock piston of the lock mechanism moves toward one side in the axial direction when the parking piston moves forward, and a locking part provided at one end of the lock piston engages from the rear with a retaining part provided on a middle section of the coupling linkage while straddling the middle section of the coupling. This enables an automatic parking brake state to be obtained by a simple structure without consuming power.
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