Exit device
US4598939A · kind A · utility
19Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1984 |
| Grant date | Jul 8, 1986 |
| Priority date | — |
| Expiry date | Jun 8, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/1092
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Exit device has auxiliary bolt which when held in by door strike permits a blocking leg to prevent unauthorized forced retraction of main latch bolt. Normal operation of device by panic bar pivots blocking leg out of the way and then retracts main latch bolt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.