Tumberless automobile ignition lock
US5836187A · kind A · utility
46Cited by
42References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1996 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Sep 27, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7876
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electronic interlock system for a tumblerless lock which utilizes radio frequency identification to enable system operation. The interlock system includes a reader which powers an antenna to generate an electromagnetic field which in turn energizes a small transponder mounted in the key. The transponder transmits a unique identification code back to the reader via the antenna where it is decoded, and if valid enables system operation, but if invalid prevents operation. The antenna is mounted at the forward end of the lock assembly. A unique key retention system and cylinder anti-rotation lock system is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.