Patent ID: 9080361
Filing Date: 2015-07-14
Classification: E05D,E05Y,E06B,Y10T

Abstract:
1. 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.