Key for an improved twisting tumbler cylinder lock
US4732022A · kind A · utility
40Cited by
19References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1986 |
| Grant date | Mar 22, 1988 |
| Priority date | — |
| Expiry date | Oct 14, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7864
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A key according to the invention includes one or more bits which are offset forwardly or rearwardly of a corresponding tumbler axis of a twisting tumbler lock with dual locking function having 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.