Automatic parking brake
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United States of America Patent
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Jul 14, 2009
Grant Date -
Jul 19, 2007
app pub date -
Nov 19, 2004
filing date -
Dec 19, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention relates to an automatic parking brake, including a brake piston, an auxiliary piston, a hydraulic chamber disposed between the brake piston and the auxiliary piston, a spring element, for prestressing the auxiliary piston, a spindle device connected to the auxiliary piston via a threaded connection, and a drive for the spindle device, wherein in a locked state of the parking brake, the brake piston is mechanically locked via the spindle device and the spring-loaded auxiliary piston, and in a released state of the parking brake, the auxiliary piston is blocked by means of the spring element and/or by means of the spindle device.
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