Symmetrical side bar lock and key therefor
US4723427A · kind A · utility
101Cited by
13References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 21, 1986 |
| Grant date | Feb 9, 1988 |
| Priority date | — |
| Expiry date | Mar 21, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7932
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cylinder lock of the type having twisting tumblers operated by a bitted key having at least one skew-cut bit provided with a side bar which is symmetrical with regard to a radius through a center of the key plug perpendicular to the plane of the key so that the side bar intersects not only slots in the twisting tumblers, but the profile of the key. The key has slots in its side face which extend perpendicular to its longitudinal axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.