Exit device with lock down mechanism
US4384738A · kind A · utility
29Cited by
6References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1980 |
| Grant date | May 24, 1983 |
| Priority date | — |
| Expiry date | Oct 16, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/57
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A lock-down mechanism for use with an exit door wherein an electromagnet on the door attracts an armature on the push rail when the latter is pushed to unlatch the door, the door being held unlatched as long as the electromagnet is energized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.