Anti-theft car protection device
US5734330A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1995 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Oct 6, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R25/2009
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An anti-theft car protection device includes a key having an IC-chip embedded therein, and an ignition switch that can be turned by the key to any "OFF" position, an "ACC" position and an "ON" position. The device further includes an antenna mounted near the ignition switch, and a communication module that provides a radio communication between the IC-chip of the key and the antenna. The device also includes an immobilizer controller that determines, in accordance with an instruction signal issued from the communication module, whether or not the engine should be started. The communication module includes an electric field generating circuit that energizes the IC-chip of the key by causing the antenna to emit an electromagnetic wave, a transmitting/receiving circuit that carries out exchange of ID-codes with the IC-chip through the antenna, and a system control circuit that controls both the electric field generating circuit and the transmitting/receiving circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.