System with a lock and a key which cooperate according to the transponder principle, as well as a key and a lock for such a system
US6150952A · kind A · utility
1Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1997 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Feb 24, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00777
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A key and lock system has a key with an integrated transponder coil that is connected to a transponder unit, and a lock with an integrated write/read coil. The key has a key bit portion and a bow portion. When the key bit portion is inserted into an elongated aperture of a key cylinder of the lock, an axis of the write/read coil forms an acute angle with an axis of the transponder coil. The acute angle substantially differs from a zero degree angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.