| 摘要 |
PCT No. PCT/DE90/00326 Sec. 371 Date Jun. 17, 1992 Sec. 102(e) Date Jun. 17, 1992 PCT Filed May 8, 1990 PCT Pub. No. WO90/13723 PCT Pub. Date Nov. 15, 1990.An automatic sliding door in which a main drive moves at least one door panel to open and closed positions. An electromagnetic clutch is located between the main drive and the door panel for the purpose of disconnecting the panel from the drive and to open the door in event of a power failure. An auxiliary drive is connected to the door panel and stores energy received when the door panel is in a closed position, so as to drive the door to the open position when the clutch disconnects the main drive from the door panel in event of power failure. The auxiliary drive has a rubber cable actuated always with the door so that the auxiliary drive can be tested with every movement of the door panel.
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