The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 2004
Filed:
Jan. 24, 2002
David Vile, Upper Heyford, GB;
John Beckley, Oxford, GB;
Transense Technologies plc, , GB;
Abstract
A pressure monitoring system has a first chamber ( ) and a second chamber ( ) separated by a diaphragm. The diaphragm carries respective SAW devices on the respective sides thereof, the SAW devices having different resonant frequencies. Variations in pressure within the second chamber ( ) relative to the pressure within the first chamber ( ) will cause deflection of the diaphragm and the resulting changes in resonant frequency of the SAW devices can be analyzed to indicate the pressure differential between the chambers. The pressure-measuring device is incorporated within a valve assembly for a vehicle tire. When the vehicle tire is inflated, the inflation pressure is trapped within the first chamber ( ) as a reference. Any subsequent loss of pressure from the second chamber ( ), e.g. as a result of a puncture, will cause deflection of the diaphragm and a corresponding output from the SAW devices.