Door closing device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 22, 1989
Grant Date -
N/A
app pub date -
Feb 25, 1988
filing date -
Jan 30, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved door closing device has a door closer main body for exerting a closing force on a door, a guide rail for guiding a slider, a tension spring provided in the guide rail and a releasably connecting device for releasably connecting the tension spring with the slider at a certain angular position of the door whereby a closing force can be additionally exerted near a position where the door is completely opened.
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