Door release mechanism
US3955840A · kind A · utility
22Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1974 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Aug 30, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/1082
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A release mechanism for doors includes a pair of pivotally mounted cams one of which is displaceable to engage and retain a tensioned door sash element while the other cam locks and holds the first cam in said engagement until influenced by either the absence or presence of electrical power to a solenoid connected to the second one of said cams to cause displacement of the second cam and thus permit displacement of the first cam and release of the tensioned door sash element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.