Garage door assemblies

Details Garage door assemblies Garage door assemblies

1976-02-25

1977-07-19

Downey, Kenneth

Movable or removable closures

Up-and-over type; e.g., moves from vertical to withdrawn...

On lever or link

49279, 49379, E05D 1540

Patent

active

040359549

ABSTRACT:
Garage door assemblies having a frame for receiving a door mounted for over head swinging movement and a spring element as an energy storing member which compensates for at least a part of the weight of the door. For the transfer of the force of the spring element to the door, there is provided a lever system including a lever capable of pivoting between a first position in which the spring force has a low leverage and a second position in which the spring force has an increased leverage sufficient to provide a turning moment capable of swinging the door. The lever is retained in its first position by a releasable locking device.

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