Temperature-offsetting magnetically coupled pressure sender
US6761072B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 2002 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Sep 2, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L19/083
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature compensating or offsetting magnetically coupled pressure sender comprises a pressure responsive element coupled to a rotating permanent magnet via a temperature sensitive element. The sender is intended to relay a pressure reading from within sealed vessels, including vehicle tires, without requiring penetration the wall of the vessel. In vehicular applications, the recommended pressure is usually stated for “cold” tires. Operating a vehicle heats up its tires and increases their pressure, which may produce a misleading indication. Pressure senders described in this invention have temperature compensating or offsetting elements built in to the pressure senders so that the indicated pressure is always referenced to a “cold” tire. Spiral or helical metallic strips or elastomeric members may be employed as the temperature compensating or offsetting elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.