Self-closing door hinge

Details Self-closing door hinge Self-closing door hinge

1978-05-19

1980-05-06

Krizmanich, George H.

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

Sash balances

Spring

E05F 106

Patent

active

042009570

ABSTRACT:
A self-closing door hinge is characterized as that the door can be automatically closed after opening the door and released by hand without any other power aid. Said self-closing door hinge comprises: A main hinge and two auxiliary hinges. Said main hinge is composed of: a right hinge leaf with sleeve, and a left hinge leaf with pivot. Said pivot of left leaf is provided with extended pin rollers which engage with the grooves in said sleeve of the right leaf.
Said grooves are made horizontally from 0 degree through 50 degrees based on the zero degree line as door closing and then inclined upwards from 50.degree. through 180.degree.. Whenever opening the door, the pivot of the left hinge leaf fixed on the door will be rotated so that the pin rollers thereof may be slipped along the grooves so as to raise the left hinge leaf and door upwards against the right hinge leaf which is fixed on the door frame. The raised door having potential will automatically fall by the gravitational force so as to close the door itself.

REFERENCES:
patent: 933648 (1909-09-01), Kaufman
patent: 1516330 (1924-11-01), Butterfield
patent: 1691759 (1928-11-01), Fischer
patent: 1942715 (1934-01-01), Kunzelman
patent: 3089184 (1963-05-01), Kerman

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