Door maneuvering arrangement

Details Door maneuvering arrangement Door maneuvering arrangement

1992-02-11

1993-04-27

Kannan, Philip C.

Movable or removable closures

Up-and-over type; e.g., moves from vertical to withdrawn...

With operator

160189, 160201, E05F 1500

Patent

active

052050700

ABSTRACT:
A drive arrangement for maneuvering a generally vertically moveable door, the arrangement comprising at least one bendable door lifting element which is connected to at least one of the two longitudinal side edges of the door. In order to enable the force required to maneuver the door to be held substantially constant, or to vary only significantly over the full opening range of the door, particularly in the case of doors of the kind in which the force required to open or maneuver the door increases with the extent to which the door is opened, the door lifting element has connected thereto an elongated, bendable counterbalance device, and the door lifting element will function to move the counterbalance device between an inactive position, in which it is generally horizontal, and an active position in which at least a part of the weight of the counterbalance device will exert a lifting force on the door through the intermediary of the door lifting element.

REFERENCES:
patent: 538431 (1895-04-01), McKenzie
patent: 1385023 (1921-07-01), Parodi et al.
patent: 1709872 (1929-04-01), Peelle
patent: 2533423 (1950-12-01), Bunch
patent: 4887658 (1989-12-01), Cloutier

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