Brake release device attached to a door machine
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United States of America Patent
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Aug 19, 2014
Grant Date -
Feb 28, 2013
app pub date -
Jan 6, 2012
filing date -
Aug 26, 2011
priority date (Note) -
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Abstract
A brake release device attached to a door machine comprises a ring plate provided with a plurality of openings and fixed on a pull chain disc, a base plate located at the outside of the door machine, a passive plate provided with a plurality of plug pins that correspond to the openings of the ring plate and slides together with the sliding pin, a guiding member fixed together with the base plate, a sliding pin corresponding to a brake release bar for releasing brake of the door machine and slidably guided by the guiding member, a spring element and a fusible link device that curbs the sliding pin from leaving the brake release bar. By the spring element, the guiding member stores potential energy for sliding.
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