Floating torsion spring tension adjustment system
US10513875B2 · kind B2 · utility
0Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2017 |
| Grant date | Dec 24, 2019 |
| Priority date | — |
| Expiry date | Jan 25, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/132
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An overhead door having a floating spring adjustment is presented. Tension is applied to a torsion spring while the door is in the open, minimal tension state. One end of the torsion spring is fixed to a spring tension trolley. The trolley translates within a trolley guide mounted to the building structure. The other end of the torsion spring is fixed to a shaft running through the torsion spring. This allows the torsion spring to change in length as the number of coils shrink and grow through door operation thereby eliminating the “snake-like” or serpentine appearance from an improper fixed torsion spring length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.