Pneumatic tire monitor
US6518877B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2001 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | May 31, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C23/131
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pneumatic tire monitoring system for monitoring pneumatic tire conditions for one or more tire/wheel assemblies mounted on a vehicle, preferably in combination with a tire pressurizing and regulating apparatus, comprises a transponder with a transmitting antenna mounted on the wheel for transmitting a signal indicating tire condition, one or more receivers with receiving antennas fixedly mounted on the vehicle, and circuitry for processing the received signals; the system characterized in that: circuitry for each transponder is on a printed circuit board within a protective housing coaxial to the hub of the wheel or wheel carrier; and each transmitting antenna is selected from the group comprising a partial loop antenna, a helical antenna, a circular dipole antenna, and a small coupling coil adjacent to an endless hoop antenna. The partial loop antenna is mounted in each housing affixed around a portion of the circumference of the printed circuit board, having an angular arc length, and comprises a serpentine portion for increasing the effective length of the partial loop antenna without also extending the angular arc length. The angular arc length and the affixed placement are d…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.