Alarm system for monitoring pressurized vehicular tires
US4319220A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1978 |
| Grant date | Mar 9, 1982 |
| Priority date | — |
| Expiry date | Jul 27, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/34
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Alarm system for monitoring pressurized vehicular tires for their gas mass, basically comprising a wheel unit for at least some of the tires of the vehicle, and a common receiver. Each wheel unit has an antenna made of a flexible material in the form of an open annulus, suitable to be snapped into and held by its resilience against the inner periphery of the respective tire, a continuous wire loop being embedded in the annulus for transmitting signals but optionally also for receiving power. At symmetrical location about the inside of the antenna, an electro-magnentic power generator module, a gas-mass monitoring sensor module, and a signal transmitter are mounted, electrically interconnected, for giving a preferably two-bit signal indication to the common receiver. The latter may have signal decoding and alarm circuitry to display at least two different conditions, namely a warning and an alarm condition. The transmitter modules in the wheel units and the common receiver may have circuitry for intermittently but continuously transmitting the two-bit signal so long as the gas mass monitored by the respective sensor module is within predetermined limits, the absence of one of the tw…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.