Electricity: motive power systems – Plural diverse motor controls – Motor-reversing
Reexamination Certificate
2007-03-02
2010-12-28
Ip, Paul (Department: 2837)
Electricity: motive power systems
Plural diverse motor controls
Motor-reversing
C318S282000, C318S286000, C318S447000, C049S324000, C049S340000, C049S349000, C049S360000
Reexamination Certificate
active
07859203
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 unit5for door with a door closer comprising: a first sensor for detecting the door2opened to the first angle A, a lock unit7for electrically lock/unlock of the rotation of the rotation axis3of the door2, a timer, a first sensor, and a control means, with which the first sensor, lock unit7, and timer is connected, for controlling the lock unit7based on the signals from the first sensor and timer.
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DT Engineering Co., Ltd.
Ip Paul
Nixon & Vanderhye P.C.
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