Cylinder lock
US5577409A · kind A · utility
17Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1994 |
| Grant date | Nov 26, 1996 |
| Priority date | — |
| Expiry date | Nov 29, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7949
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
When a key other than a regular key or the like is inserted to forcibly rotate a key rotor, a coupling member is moved in a direction indicated by an arrow by an uncoupling mechanism. This movement uncouples a rear rotor from the coupling member. As a result, the key rotor and a sleeve only rotate idly, and the rear rotor and a lock lever are not rotated. Hence, a cylinder lock is not unlocked, and no damaging force is never applied to components of the cylinder lock such as tumblers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.