Friction hinge

Details Friction hinge Friction hinge

1990-03-15

1991-07-16

Rowan, Kurt

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

Checks and closers

Hinge

16341, 16342, E05F 320

Patent

active

050312707

ABSTRACT:
A hinge for a self-closing door includes a pair of hinge leaves having their respective knuckles joined to a hinge pin, one of the hinge leaves being fixed to the hinge pin and the other rotatable with respect to the same. A torsion spring is wound when the door to which the hinge is attached is opened. The torsion spring exerts a returning force which tends to keep the door in a closed position. Friction means is employed to arrest the closing of the door to prevent slamming. The friction means includes a first and second set of alternately interleaved friction plates, one set of which rotates while the other remains fixed when the door is allowed to close. The rubbing of the friction plates generates a retarding force which arrests the closing of the door. An adjusting member is also added to vary the amount of friction between the friction plates with the degree of opening of the door.

REFERENCES:
patent: 754690 (1904-03-01), Pelzer
patent: 926520 (1909-06-01), Thornton
patent: 1006765 (1911-10-01), Manderbach
patent: 1632428 (1927-06-01), Benham et al.
patent: 1644249 (1927-10-01), Harrison
patent: 1877639 (1932-09-01), Banfield
patent: 2516935 (1950-08-01), Weaver
patent: 2641794 (1953-06-01), Raskin
patent: 2814049 (1957-11-01), Mercur
patent: 3215449 (1980-08-01), Loikitz
patent: 3515433 (1970-06-01), Tabor
patent: 3801155 (1974-04-01), Hodgen et al.

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