Spring hinge

Details Spring hinge Spring hinge

1974-11-22

1976-08-24

Kundrat, Andrew V.

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

Sash balances

Spring

16 50, 16 76, E05F 108

Patent

active

039757943

ABSTRACT:
A cam rise hinge has a swingable strap portion which is cammed up relative to a stationary butt portion when a door on which the strap portion is mounted is swung towards its open position. A coiled wire torsion-compression spring is positioned and mounted so as to be compressed and simultaneously twisted when the strap portion is cammed up. This generates two different forces aiding each other and gravity in swinging the strap portion and door back toward closed position.

REFERENCES:
patent: 70921 (1967-11-01), Vetter
patent: 76727 (1868-04-01), Esten
patent: 647905 (1900-04-01), Roche
patent: 1108298 (1914-08-01), Winter
patent: 2441455 (1948-05-01), Tetzman
patent: 3748688 (1973-07-01), Berkowitz

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