Door closer power adjusting device
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United States of America Patent
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-
Jun 26, 2007
Grant Date -
Jan 20, 2005
app pub date -
Jul 14, 2004
filing date -
Jul 18, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A door closer power adjusting device for a door closer having a spindle driven by a compressed spring with a movable plate for adjusting spring compression, or with a screw for adjusting spring compression, between a high and low level of compression. A powered unit moves the plate in a first direction to achieve the low level of compression and in a second direction to achieve the high level of compression. A switch activates the powered unit in the first direction and a first switch is engaged when the spring is compressed to the low level of compression to deactivate the powered unit. A timing circuit activates the powered unit in a second direction after passage of a predetermined time. A second switch is engaged when the spring is compressed to the high level of compression to deactivate the powered unit.
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