Cylinder lock-key-combination
US6799447B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1999 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Sep 23, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7881
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cylinder lock includes a turnable lock cylinder located inside a lock body and a set of code locking discs located inside the lock cylinder. Each locking disc has a key opening and is turnable in the lock body in a first turning direction from an initial position to an opening position by application of turning force to a counter surface bounding the key opening. The key opening of at least a first code locking disc is bounded by at least two discrete counter surfaces. A key is insertable in the lock when the locking discs are all at the initial position. The key has a set of combination surfaces corresponding respectively to the locking discs, for engaging a counter surface of each locking disc and applying turning force thereto when the key is inserted in the lock and is turned in the first turning direction, so that the locking discs are turned in the first turning direction to their respective opening positions. The combination surface corresponding to the first code locking disc can be provided selectively with one of at least two combination values, whereby the combination surface engages a selected one of the discrete counter surfaces for applying turning force in the firs…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.