Device for automatic door closing

Details Device for automatic door closing Device for automatic door closing

1977-01-18

1978-01-31

Feldbaum, Ronald

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

Closers

Spring

16 73, 16 85, E05F 108, E05F 506

Patent

active

040707270

ABSTRACT:
A device for automatic closing of a door includes a plate spring of predetermined length, having an arcuate cross-section and a center section. The spring is bent about the center section at an angle deviating slightly from a straight line. The door may be opened and closed about a hinge, and the spring ends are attached to a wall and the door, respectively.

REFERENCES:
patent: 1319554 (1919-10-01), Anderson
patent: 2011694 (1935-08-01), Stevens
patent: 2730774 (1956-01-01), Sagstven
patent: 3137889 (1964-06-01), Sogian
patent: 3329991 (1967-07-01), Gobble
patent: 3385344 (1968-05-01), Andrews
patent: 3785006 (1974-01-01), Metz

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