Device for motorizing an overhead swinging door for a garage or

Details Device for motorizing an overhead swinging door for a garage or Device for motorizing an overhead swinging door for a garage or

1993-08-06

1994-12-20

Kannan, Philip C.

Movable or removable closures

Up-and-over type; e.g., moves from vertical to withdrawn...

With operator

49204, 49280, E05F 1500

Patent

active

053736630

ABSTRACT:
An overhead swinging door is swingably mounted on two side supports slidable in two vertical guides and each connected to a counterweight by a cable re-directed over an upper pulley. On at least one of the door sides, the counterweight is also connected to the respective side support by a chain which forms an endless ring with the cable and is re-directed over a lower wheel driven by a motor and reducing gear unit which is preferably located within the side upright of the door frame.

REFERENCES:
patent: 1843973 (1932-02-01), Dickason
patent: 1980303 (1934-11-01), Thompson
patent: 2163394 (1939-06-01), Clark
patent: 2388182 (1945-10-01), Redding et al.
patent: 4819376 (1989-04-01), Taddei
patent: 5036899 (1991-08-01), Mullet

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