Variable position door closer

Details Variable position door closer Variable position door closer

1989-06-05

1990-12-25

Seidel, Richard K.

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Checks and closers

Liquid

16 69, 16 64, 16 71, 16 79, 49324, 49340, E05F 300

Patent

active

049792610

ABSTRACT:
Disclosed is a door control device that automatically repositions the driving shaft of the door closer toward and away from the door pivot, as the door opens and closes, as a means of modifying and improving the force required to open and close the door. Movement is accomplished by a double ended driving shaft having a sprocket gear on one end which drivingly engages a track which in turn repositions the slide mounted door closer to more favorable positions as the door opens and closes.

REFERENCES:
patent: 605836 (1898-06-01), Ashley
patent: 734658 (1903-07-01), Beauregard et al.
patent: 1526395 (1925-02-01), Swanson
patent: 1605256 (1926-11-01), McAboy
patent: 4744125 (1988-05-01), Scheck et al.

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