Cylinder lock
US4635455A · kind A · utility
52Cited by
3References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1985 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Jul 19, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7932
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A twisting tumbler lock with dual locking function has tumbler points at tumbler positions selectively offset forwardly or rearwardly and selectively rotatable to different angular positions to create an enormous number of keying combinations. A key according to the invention includes one or more bits which are offset forwardly or rearwardly of a corresponding tumbler axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.