US 2015/0020456 A1 · OVERHEAD DOOR BACKUP SPRING SYSTEM

Abstract

The present invention essentially comprises an overhead door backup spring system for providing an auxiliary spring counterweight to operate an overhead door shaft upon failure of a spring. The system has an activation unit, a control assembly, an engagement assembly operably associated with the activation unit, and an auxiliary spring engagement assembly operably associated with the control and engagement assemblies. The control assembly has an engagement block engageable with a spring post of the auxiliary spring assembly. The engagement assembly has an engagement post engageable with the spring post to transfer torque from the auxiliary spring to the overhead door shaft. An engaged position has the engagement post not engaged with the spring posts while the engagement block is engaged with the spring post. A non-engaged position has the engagement post engaged with the spring post, and the engagement block not engaged with the spring post.

Claims18

Dependent claims

An overhead door backup spring system comprising:

a spring associated with a shaft of an overhead door assembly;
an activation unit;
a control assembly having a moveable engagement block;
an auxiliary spring engagement assembly having at least one spring post extending from an auxiliary spring, said spring post being operably associated with said engagement block;
and
an engagement assembly operably associated with said activation unit and said auxiliary spring engagement assembly, said engagement assembly being slidably associated with said shaft, and said engagement assembly having at least one engagement post engageable with said spring post;
wherein said engagement post being in non-engagement with said spring post, and said engagement block being engaged with said spring post in a non-engaged position;
wherein said engagement post being engaged with said spring post, and said engagement block being in non-engagement with said spring post in an engaged position;
wherein said engagement assembly being configured to transfer torque from said auxiliary spring to said shaft in said engaged position.

6 more elements

Dependencies are inferred from the claim text.

Overhead door backup spring system

Life of this patent

Overhead door backup spring system

Life of this patent

Abstract

Claims18