Door Closer Comprising Additional Closing Spring
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United States of America Patent
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-
N/A
Issued Date -
Nov 1, 2012
app pub date -
Nov 30, 2010
filing date -
Dec 1, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A door closer, in particular a hinge door closer, including a free-swing function, having a door closer housing, an output shaft to be connected to a door, a piston assembly connected to the output shaft and guided in the door closer housing, a closer spring, a piston rod adapted to connect the piston assembly to the closer spring, a free-swing assembly which is adapted to enable a translational motion of the piston assembly decoupled from the closer spring when the closer spring is locked, and a hydraulic lock compartment adapted to lock the closer spring. An additional closer spring acts on the piston assembly, in order to slightly load the piston assembly toward the closing direction when in free-swing mode. The additional closer spring is weaker than the closer spring.
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