High security cylinder lock
US4679418A · kind A · utility
14Cited by
9References
4Claims
0Family size
Inventor
Key dates
| Filing date | Apr 2, 1986 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Apr 2, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7921
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cylinder operated deadbolt lock in which a solid housing is provided with bores and apertures only to accommodate the lock components, such as the lock cylinder, the lock bolt, and the bolt moving mechanism. The lock bolt is thrown and withdrawn by a pinion bolt moving mechanism which engages a rack formed on the bolt. The lock is further provided with a drill resistant guard plate which is mounted in the housing and protects the lock cylinder against drilling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.