| 摘要 |
PCT No. PCT/GB96/03113 Sec. 371 Date Jun. 19, 1998 Sec. 102(e) Date Jun. 19, 1998 PCT Filed Dec. 17, 1996 PCT Pub. No. WO97/23701 PCT Pub. Date Jul. 3, 1997Apparatus (20) for automatically closing a sliding door (40), comprising a pneumatically controlled weighted piston (1) within a vertical tube 5' for operative connection to a sliding panel (13) forming part of a sliding door assembly such that sliding the panel into the open door position lifts the piston which then falls again under its own weight with pneumatic control once the sliding panel is released, thus closing the door.
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