Door closer capable of realizing self-control positioning
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United States of America Patent
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-
May 21, 2013
Grant Date -
Jul 5, 2012
app pub date -
Jun 22, 2011
filing date -
Jan 4, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A door closer capable of realizing self-control positioning has a cylindrical housing, a piston, a spring and a pull rod; the piston is built in the cylindrical housing and connected and fastened with one end of the pull rod; the pull rod is sheathed in the spring, and the two end parts of the spring respectively are in contact with a sealing lid of the piston and the cylindrical housing; the door closer further has a self-control positioning mechanism having a cylindrical outer sleeve a control part and a locking part; the cylindrical outer sleeve is connected and fastened with the cylindrical housing; the control part and the locking part are linked by a clutch and joined together; the locking part and the pull rod are linked by a clutch, and the pull rod is provided with a series of grooves which can be clasped with the locking part.
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