Lock-key system
US4653298A · kind A · utility
9Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1984 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Nov 5, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7893
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A key for a lock-key system, particularly for a hierarchal lock system, is provided which has an invariable basic profile and a variation or system profile in which the invariable basic profile is allocated to the region of the key facing carrying the classification notches and has at least two profiled formations which cross the centerline of the key. The variation or system profile is allocated to the key region adjacent to the key spine. Variations are provided in the system profile by longitudinal incisions having a rectangular cross-section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.