Door machine mechanism for rolling door having functions of fireproof, smokeproof, and fire escape
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United States of America Patent
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Oct 20, 2015
Grant Date -
Mar 6, 2014
app pub date -
Aug 30, 2013
filing date -
Aug 31, 2012
priority date (Note) -
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Abstract
A door machine mechanism for a rolling door has an electric machine mechanism, a brake mechanism and an output mechanism. In normal power supply condition, the rolling door is opened by the electric machine mechanism. In case of fire, the brake mechanism releases brake so that the rolling door moves downward by its own weight. However, in an emergency condition, if an external force is applied to push the door upward, the rolling door will be reopened by an assistance of spare electricity to the electric machine mechanism.
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