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US 12,221,805 B2Granted
Dampening mechanism for touch bar exit device
AssigneePDQ Industries, Inc.
InventorCurtis Andrew Zook
Life of this patent
Estimating the term…
Abstract
An embodiment is directed to a touch bar exit device for use on an exit door. The touch bar exit device include a touch bar and a link bar which moves as the touch bar is depressed. A return mechanism is mounted on the link bar. A damper mechanism is mounted on the link bar. The damper mechanism limits the travel of the link bar and the touch bar to dampen the sound of the touch bar exit device when the touch bar is depressed.
Claims12
A touch bar exit device for use on an exit door, the touch bar exit device comprising:
- a touch bar;
- a link bar which moves as the touch bar is depressed;
- a return mechanism mounted on the link bar, the return mechanism has a return spring with a second spring rate;
- a damper mechanism mounted on the link bar, the damper mechanism has a damper spring with a first spring rate;
- damper spring mounting projections extending from a back plate of the touch bar exit device, the damper spring mounting projections having first ends which are configured to cooperate with the damper mechanism;
- a spring block provided on the link bar, the spring block having a first damper spring engagement projection, a second damper spring engagement projection and a return spring engagement projection;
- a first return spring engagement end of the return mechanism engages a second end of the respective damper spring mounting projection, and a second return spring engagement end of the return mechanism engages the return spring engagement projection of the spring block to retain the return mechanism in position relative to the back plate;
- wherein the damper mechanism dampens the sound of the touch bar exit device when the touch bar is depressed or when the touch bar is disengaged.
5 more elements
A touch bar exit device for use on an exit door, the touch bar exit device comprising:
- a touch bar;
- a link bar which moves as the touch bar is depressed;
- a back plate, the link bar is movable relative to the back plate;
- a return spring assembly provided in engagement with the link bar and the back plate;
- a damper spring assembly provided in engagement with the link bar and the back plate;
- damper spring mounting projections extending from the back plate, the damper spring mounting projections having first ends which are configured to cooperate with the damper spring assembly;
- a spring block provided on the link bar, the spring block having a first damper spring engagement projection, a second damper spring engagement projection and a return spring engagement projection;
- a first return spring engagement end of the return spring assembly engages a second end of a respective damper spring mounting projection, and a second return spring engagement end of the return spring assembly engages the return spring engagement projection of the spring block to retain the return spring assembly in position relative to the back plate;
- wherein a first spring rate of the damper spring assembly is higher than a second spring rate of the return spring assembly;
- wherein the damper spring assembly dampens the travel of the link bar and the touch bar to dampen the sound of the touch bar exit device when the touch bar is depressed or disengaged.
7 more elements
Dependencies are inferred from the claim text.