US 2024/0200403 A1 · ROLLUP DOOR TENSION DEVICE

Abstract

The torsion spring is disposed around an axle/shaft and fixed to the axle/shaft at one end, such that the torsion spring rotates with the door drum and fixed to a spring plate as a stationary structure at the other end. The spring plate does not rotate while the torsion spring rotates. The torsional forces created in the spring by the rotation of the door drum provides a variable torque which counteracts the weight of the flexible door. As the flexible door is lowered, the torsional forces developed in the spring pull in the opposite direction of the travel of the flexible door. The amount of tension resulting from the torsional forces generated in the torsion spring determines the performance characteristics of the flexible door.

Claims20

Dependent claims

A door package assembly for a rollup door, comprising:

an axle;
a spring plate positioned about the axle and attached to the axle;
a spring having a first end and a second end, positioned about the axle, and attached to the spring plate at the first end;
a door drum positioned about the axle and attached to the second end of the spring;
and
a tube attached to an outer edge of the door drum.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

18/068,635Filed 20 Dec 2022

Published

20 Jun 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification3 codes

E06B 9/60
Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor:…
E06B 9/17
Roller shutters: parts or details of roller shutters, e.g. suspension devices, shutter boxes, wicket doors, ventilation openings
E06B
Fixed or movable closures for openings in buildings, vehicles, fences or like

Rollup door tension device

Life of this patent

Rollup door tension device

Life of this patent

Abstract

Claims20