Delay unit for door with a door closer, door closer with a delay unit, and door with a door closer having a delay unit
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United States of America Patent
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Dec 28, 2010
Grant Date -
Sep 20, 2007
app pub date -
Mar 2, 2007
filing date -
Mar 13, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
The Objective of the present invention is to provide a delay unit for door with a door closer, which is capable of automatically closing the door after the elapse of a certain time since the door was opened and can be installed in case that the door closer is embedded inside the building and thereby being not exposed.The objective is solved by providing a delay unit 5 for door with a door closer comprising: a first sensor for detecting the door 2 opened to the first angle A, a lock unit 7 for electrically lock/unlock of the rotation of the rotation axis 3 of the door 2, a timer, a first sensor, and a control means, with which the first sensor, lock unit 7, and timer is connected, for controlling the lock unit 7 based on the signals from the first sensor and timer.
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