Automatic door closing device

Details Automatic door closing device Automatic door closing device

1978-07-24

1980-04-08

Foss, J. Franklin

Closure fasteners

Bolts

Double acting

16 84, 292DIG19, E05C 1902

Patent

active

041969243

ABSTRACT:
An automatic door closing device includes a bell crank lever pivotablly mounted on the door which cooperates with a hook-shaped cam plate mounted on the door frame. A spring biased dash pot controls movement of the bell crank lever when the door is opened and closed, assuring that the door will close slowly but positively without slamming. Means is provided on the frame of the device to assure proper positioning of the bell crank lever with respect to the top edge of the door and the hook-shaped cam plate.

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patent: 3871665 (1975-03-01), Burke
patent: 3979790 (1976-09-01), chiarappa
patent: 4048905 (1977-09-01), Souslin

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