Unidirectional centrifugal mechanism of door operator
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United States of America Patent
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Dec 13, 2016
Grant Date -
Apr 16, 2015
app pub date -
Oct 13, 2014
filing date -
Oct 14, 2013
priority date (Note) -
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Abstract
A rolling door operator comprises a rotary shaft, a centrifugal brake mechanism, and a unidirectional centrifugal mechanism, in which a latching tooth and plurality of slots are disposed around one end of the rotary shaft, and the unidirectional centrifugal mechanism includes an active pin with an axial latching face and a sliding face, the axial latching face being engaged with one of slots to latch the rotary shaft together only in the falling direction of a door curtain, and the sliding face having a bevel adjacent to the latching face to contact slidingly over the slots, so that the door curtain can be lifted up immediately in another direction, and without affecting normal opening function of the door curtain.
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