Pin tumblers and corresponding keys for cylinder locks
US5289709A · kind A · utility
27Cited by
17References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1991 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Oct 24, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7881
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tumbler pin tip and key surface are configured so that when engaged, the tumbler pin tip fully and precisely seats in the key bitting, and thus is rotationally positioned at a predetermined location. The contacting surfaces are generally sloped from one edge of the tumbler (and key surface) to the other in tapered form and the sloping surface may be flat, concave, convex or a combination as disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.