Apparatus for maintaining a constant radial distance between a transmitting circuit and an antenna coil
US5844130A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1997 |
| Grant date | Dec 1, 1998 |
| Priority date | — |
| Expiry date | Mar 24, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C23/0442
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle including a frame member and a vehicle wheel mounted for rotation relative to the frame member about a rotation axis. The vehicle also includes a transmitting circuit mounted on a one of the frame member and the vehicle wheel. The transmitting circuit includes an antenna coil having a diameter. A ferrite core is mounted adjacent the transmitting circuit on the one of the frame member and the vehicle wheel. A non-planar, curved antenna coil is mounted on the other of the frame member and the vehicle wheel. The non-planar, curved antenna coil has a radius of curvature that is approximately equivalent to the rotational pathway of the transmitting circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.