Tensioning tool for a counterbalance system for sectional doors
US7784521B2 · kind B2 · utility
8Cited by
23References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2008 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Dec 18, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/106
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A door system (10) including, a door (D) movably mounted on a track assembly (15), a counterbalance system (20) connected to the door and having at least one spring (25), a tool adapter (26) proximate at least one end of the counterbalance system, a detachable winding assembly (30) adapted to selectively engage and selectively rotate the tool adapter to adjust tensioning of the spring, and a locking assembly (36) interacting with the counterbalance system to maintain a selected tensioning of the counterbalance system upon detaching the winding assembly from the tool adapter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.