Braking device
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United States of America Patent
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Sep 1, 2015
Grant Date -
Jan 31, 2013
app pub date -
May 21, 2010
filing date -
May 21, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A braking device for an elevator is disclosed. The device may include a motor, a braking system, a first switch, and a second switch. The motor may be capable of generating a counter-electromotive force. The braking system may move to a disengaged position upon being energized and may move to an engaged position upon being de-energized. The first and second switches may have an open state. In the open state, the switches electrically couple the motor to the braking system so that the counter-electromotive force of the motor may energize the braking system.
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