Safety devices for overhead garage door springs
US4640049A · kind A · utility
12Cited by
6References
6Claims
0Family size
Inventor
Key dates
| Filing date | Oct 29, 1985 |
| Grant date | Feb 3, 1987 |
| Priority date | — |
| Expiry date | Oct 29, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/106
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A safety device for overhead garage and like door structures having a counterbalance spring structure including a coil spring which includes a safety cable extending through the open center of the coil spring and adjustably anchored at each end to the garage structure so as to be placed under sufficient tension to contain the spring against substantial horizontal or vertical movement in the event of breakage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.