Patent ID: 6390520
Filing Date: 2002-05-21
Classification: E05B,Y10T

Abstract:
An electric door opening mechanism operable in a fail safe and a fail secure mode, the electric door opening mechanism comprising:housing having a cutout portion with an opening adapted to receive a bolt of a door, at least one keeper arm pivotally mounted to the housing, the at least one keeper arm having a locked position occluding the opening and an open position allowing the bolt to be inserted and withdrawn from the opening, a transmission lever corresponding to each of the at least one keeper arm, the at least one transmission lever pivotally mounted to the housing, means for releasably engaging the at least one transmission lever and the at least one keeper arm, the at least one transmission lever holding the at least one keeper arm in the locked position when engaged therewith, a release lever adapted to engage the at least one transmission lever, the release lever being pivotally mounted to the housing, the release lever having a first unlocked position, a second locked position and a third unlocked position, the release lever in the locked position holding the at least one transmission lever in engagement with the at least one keeper arm, the axis of rotation of the release lever, the transmission lever and the at least one keeper arm being parallel, means for moving the release lever between positions, the means for moving the release lever being adapted to operate when connected electrically, means for selecting a fail safe or a fail secure mode in which the release lever is in the first unlocked position or the locked position when the means for moving the release lever is not electrically connected.