Door holdback device
US4269439A · kind A · utility
7Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1979 |
| Grant date | May 26, 1981 |
| Priority date | — |
| Expiry date | Jul 30, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/087
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A door holdback device holds a door or panel in open position. It may be mounted upon the wall of a conventional boxlike highway trailer and is automatically retractable to an inoperative position. The holdback device has a primary wire loop extending from the wall, said primary loop being integrally attached to two secondary wire loops, which are then secured to the interior of the wall. The secondary wire loops are internally stressed to retract the primary loop when not in use. A second embodiment employs an internally stressed primary loop which moves about its supporting mount to assume an operative position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.