Torque rod operated counterbalancing hinge and door assembly

Details Torque rod operated counterbalancing hinge and door assembly Torque rod operated counterbalancing hinge and door assembly

1988-10-27

1989-10-17

Dorner, Kenneth J.

Movable or removable closures

With means mounting closure for swinging

With biasing means

16308, E05F 110

Patent

active

048737917

ABSTRACT:
A torque rod operated counterbalancing hinge comprising first and second hinge members connected together at a hinge point, the second hinge member being curved with a cam surface to the first hinge member, and the other end rotatable relative to a pivot point located at a position displaced from the location of the hinge point. A lever arm has one end rotatably mounted at the pivot point and the other end has a bearing surface for contacting the cam surface. The rotating end of the torque rod is fixed relative to the lever arm whereby rotational hinge motion of the first hinge member relative to the second hinge member causes the cam surface to press upon the bearing surface through a moving contact point which rotates the lever arm to produce a counterbalancing twisting of the torque rod. The invention also includes a door assembly employing the counterbalancing hinges.

REFERENCES:
patent: Re32878 (1989-02-01), Leonard
patent: 3061871 (1962-11-01), Swanson
patent: 3067453 (1962-12-01), Lyons
patent: 3085286 (1963-04-01), Whitehouse
patent: 3339969 (1967-09-01), Bridle et al.
patent: 3476375 (1969-11-01), Brasseur
patent: 3490756 (1970-01-01), Spier
patent: 3896595 (1975-07-01), Anghinetti et al.
patent: 4163344 (1979-08-01), Scherer
patent: 4402111 (1983-09-01), Selby et al.
patent: 4580315 (1986-04-01), Beckwith
Product Design and Development Airport Counterbalance Advertisement, Jan., 1987.
Bilco Installation Instructions (copyright 1984) p. 3.

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