Safety door latch bolt
US5141268A · kind A · utility
14Cited by
11References
4Claims
0Family size
Inventor
Key dates
| Filing date | Sep 25, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Sep 25, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/1028
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A safety door latch bolt for use in doors or the like that prevent accidental and unintentional locking of the door. The safety door latch bolt functions in all other respects as a typical standard door lock while providing a fail safe locking mechanism that automatically unlocks the door latch upon closure through the use of an improved locking element and safety release tongue pin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.