| 摘要 |
An apparatus for holding open a door or similar member for a predetermined time period includes a suction mechanism coupled to the door and the door frame. The suction mechanism includes an adjustable valve to provide a controlled flow of air to release the suction. The mechanism includes an arm having a suction cup at one end and a suction plate pivotally connected to the arm for engaging the suction cup when the door is in the open position. The suction mechanism is attached to the inner surface of the door and the necessary relative motions of parts achieved by an articulated connecting rod and suction cup pad assembly are pivotally attached to the adjacent door frame. The articulated assembly permits the face of the suction cup and its target to be parallel to the door in the open and closed positions. The arm is connected to a spring loaded mounting assembly so that the door's maximum opening limitation is dictated by the spring closing mechanism or other motion limiting device.
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