Flexible counterweight system for overhead doors and like instal

Details Flexible counterweight system for overhead doors and like instal Flexible counterweight system for overhead doors and like instal

1988-07-01

1989-12-19

Britts, Ramon S.

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

With mounting or supporting means

160201, E05F 1154

Patent

active

048876585

ABSTRACT:
A counterweight system for an overhead door or like installation includes an elongate flexible belt having a series of pockets to receive weights, the belt being suspended at the side of the door from a cable that passes over a pulley and is attached to the lower end of the door, the lower end of the belt being connected to the door frame about halfway in the height of the door such that when the door moves in the opening direction the weights are successively suspended from the fixed attachment point so that the opening force applied to the door accurately counterbalances the effective weight of the door at all points in the opening movement.

REFERENCES:
patent: 1469542 (1923-10-01), Storms
patent: 1603379 (1926-10-01), Dautrick
patent: 3079989 (1963-03-01), Fentiman
patent: 3094163 (1963-06-01), Herber

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