Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Hinge – Resiliently biased hinge
Patent
1984-08-20
1986-04-22
Silverberg, Fred
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Hinge
Resiliently biased hinge
16301, 16381, E05F 108
Patent
active
045832625
ABSTRACT:
One leaf of a spring hinge has a center knuckle and the other leaf has aligned top and bottom end knuckles which are spaced apart. The center knuckle of the one leaf fits between the two end knuckles of the other leaf and is maintained in alignment with them by top and bottom hinge pins, the former extending from the top knuckle into the center knuckle and the latter from the bottom knuckle into the center knuckle. Whereas the bottom pin is attached to the center knuckle, the top pin is attached to the top knuckle, but its angular position is easily changed. Each pin has a threaded portion that is located within the center knuckle, and the end convolutions on a coil-type torsion spring are threaded over these threaded portions to secure the spring to the hinge pins. Each hinge pin also has a shank which extends from its threaded portion through the interior of the spring where the ends of the two shanks abut. Thus, the spacing between the hinge pins is fixed and the two pins may be driven from the knuckle much like a conventional hinge pin. The torque exerted by the spring may be varied by changing the angular position of the top pin with respect to the top knuckle.
REFERENCES:
patent: 142855 (1873-09-01), Joyce
patent: 387421 (1888-08-01), Keil
patent: 3538538 (1970-11-01), Field
patent: 3965533 (1976-06-01), Frohlich
patent: 4339845 (1982-07-01), Newlon et al.
patent: 4419788 (1983-12-01), Prout
C. Hager & Sons Hinge Manufacturing Company
Silverberg Fred
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