Keyless vehicle entry apparatus
US4755823A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1986 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Aug 4, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00793
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A keyless entry apparatus for locking and unlocking a door, trunk lid, and window of a vehicle uses electric waves radiated from a transmitter which are received by a pickup which is provided on a vehicle body in a concealed state without any external exposure which would impair the aesthetic appearance of the vehicle body. The pickup consists of a loop antenna or an electrostatic detection antenna which detects the surface currents induced on the vehicle body by the electric waves radiated from the transmitter. The pickup is disposed at a portion on which the surface currents are concentrated such as, for example, a front pillar, trunk lid and roof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.