Cylinder lock
US4426864A · kind A · utility
16Cited by
8References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1981 |
| Grant date | Jan 24, 1984 |
| Priority date | — |
| Expiry date | Oct 9, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/80
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cylinder lock including a rotor casing formed with a groove and an elongated through-opening, a rotor rotatably received in the rotor casing, tumblers which are respectively formed with projecting ends engageable with the groove and slidably fitted into the rotor, a tumbler blocking member slidably inserted into the elongated through-opening, a plunger and a plunger driving device. By the above arrangement, the cylinder lock can be positively unlocked either by using a key or without using the key and instead using the plunger driving device and driving the tumbler blocking member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.