Overhead garage door spring safety device
US3958367A · kind A · utility
Inventor
Key dates
| Filing date | Dec 26, 1974 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | Dec 26, 1994 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/106
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A safety device for use in combination with elongated coil springs substantially balancing the door weight for ease of opening and adapted to urge said door toward an open position after partial opening movement. The safety device includes an elongated flexible member extending longitudinally substantially axially through the elongated spring with ends thereof beyond the spring ends as with one end fixedly mounted adjacent a fixed end of the spring and the other end thereof resiliently mounted adjacent the other end of the spring whereby separate portions of the spring will be retained on the elongated flexible member in the event of breakage of the coil spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.