Bottom bracket for upward acting door

Details Bottom bracket for upward acting door Bottom bracket for upward acting door

2000-04-19

2001-07-24

Purol, David M. (Department: 3634)

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

With mounting or supporting means

C160S193000

Reexamination Certificate

active

06263948

ABSTRACT:

FIELD OF THE INVENTION
The present invention pertains to a combination guide roller support and lifting cable connection bracket for an upward acting door.
BACKGROUND
Upward acting or vertical opening sectional doors, as well as single panel doors, are ubiquitous as both residential and commercial garage doors. One continuing and pressing need in the art of such doors has been to reduce the weight of the door while not sacrificing strength and rigidity and to provide a suitable secure closure over the door opening, such as a garage vehicle entry opening. One problem associated with providing lightweight doors constructed of metal sheet, as well as polymer materials has been the provision of suitable brackets for transferring loads from door counterbalance or lifting cables to the door structure itself and to also provide a suitable guide member support structure for the lowermost guide member for guiding the door for movement between open and closed positions. Such brackets should also be arranged in such a way as to minimize inadvertent disconnection of the bracket from the door when the door counterbalance or lifting cables are under high tension, so as to minimize the chance of injury, damage to the door structure and/or damage to the counterbalance mechanism. It is to these ends that the present invention has been developed.
SUMMARY OF THE INVENTION
The present invention provides an improved bottom edge bracket for a sectional as well as a single panel upward acting door.
In accordance with one aspect of the invention, a door bottom edge bracket is provided for an upward acting door wherein the point of attachment of a counterbalance or door lifting cable, or similar flexible member, to the door is arranged in such a way as to transfer lifting forces to the door in an improved manner and to minimize the chance of unwanted disconnection of the bracket from the door when the door is in a closed position and maximum force is exerted on the bracket and the door lifting cable.
In accordance with another aspect of the invention, a bottom edge bracket is provided for an upward acting door which is particularly adapted for supporting a door guide member, including, in particular, a support shaft for a guide roller.
In accordance with another aspect of the present invention, a bracket is provided for an upward acting door which is particularly adapted for transferring door counterbalance or lifting forces to the door structure while minimizing the concentration of forces acting on the door structure.
Still further, the present invention provides a combined counterbalance cable attachment bracket and guide member support bracket for an upward acting door which is easy to fabricate and reliable in operation.
Those skilled in the art will further appreciate the above-mentioned advantages and superior features of the present invention together with other important aspects thereof upon reading the detailed description which follows in conjunction with the drawing.


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