APPARATUS FOR AUTOMATIC CLOSING OF SLIDING DOORS

摘要

Apparatus (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 (1) which then falls again under its own weight with pneumatic control (6, 7) once the sliding panel is released, thus closing the door.