Key system for a vehicle
US5117097A · kind A · utility
68Cited by
13References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1991 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | Feb 20, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7079
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A key system provided with the key, a magnetic core, a cylinder body and the magnetic field generation coil. In the key system communication is performed through magnetic coupling between the key and a cylinder so as to drive a controlled object. An inductance and capacitance resonance (LC) circuit having intrinsic resonance points as key information is mounted in the head of the key. The magnetic core is secured to the outside circumferential surface of a rotor at the key insertion hole thereof so as to form a magnetic circuit in cooperation with the key when the key is inserted into the key insertion hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.