Cylinder lock
US6314774A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 2000 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Feb 4, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7605
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cylinder lock (1) comprises a cylinder housing (2), a plug (3) having a key slot (3c), and a driver (20). The cylinder housing (2) has a row of pin channels in a "twelve o'clock" position and a row of pin channels in a "ten o'clock" position, to enable the lock to be operated with a service key that can be inserted in the "ten o'clock" position. A cylindrical latching element (15) surrounds the inner end of the plug and moves in accompaniment with rotation of the plug as the plug is turned with a standard key (8). The latching element (15) is held fixed when the plug is rotated by means of a service key (9). The latching element is designed to co-act with means on the driver that enable the plug (3) to move axially upon transition of the "twelve o'clock" position, wen the plug is rotated by means of the service key. The latching element is held fixed in relation to the housing (2) by means of an intermediate pin (6).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.