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:
Feb. 26, 2008
Filed:
Feb. 23, 2006
Dimi Apostolopoulos, Pittsburgh, PA (US);
Stuart Heys, Pittsburgh, PA (US);
James Teza, Pittsburgh, PA (US);
Michael Wagner, Pittsburgh, PA (US);
Donggi Kim, Daejeon-Si, KR;
Dimi Apostolopoulos, Pittsburgh, PA (US);
Stuart Heys, Pittsburgh, PA (US);
James Teza, Pittsburgh, PA (US);
Michael Wagner, Pittsburgh, PA (US);
Donggi Kim, Daejeon-Si, KR;
Dymos Co., Ltd., Farmington Hills, MI (US);
Abstract
A system for monitoring tire pressure and producing a first signal in the event that a low tire pressure condition has been sensed and a second, different signal in the event that a low tire pressure condition has not been sensed and a third signal in the event that the system is not operable. The system comprises a sensor for each tire and an associated transceiver antenna coil. Each sensor comprises a pressure switch and a circuit that has a first resonant frequency when the pressure switch is in a first state and a second, different resonant frequency when the switch is in a second state. An excited circuit associated with each transceiver antenna coil generates an AC electromagnetic field across the transceiver antenna coil and a detector circuit is operable to demodulate information communicated passively by the sensor that reflects its resonant frequency.