Pick-proof lock
US3938358A · kind A · utility
7Cited by
9References
16Claims
0Family size
Inventors
Key dates
| Filing date | Sep 10, 1973 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Sep 10, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7944
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A highly safe, relatively pick-proof lock to be used as a replacement for standard lock cylinders in conventional doors. A plurality of independently operating locking means serving to enhance the difficulty of picking a lock including split keyways, locking cams, shear line blocking means and a hardened steel face plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.