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:
Mar. 23, 2010
Filed:
Mar. 21, 2007
Takashi Saitou, Okazaki, JP;
Akira Takaoka, Okazaki, JP;
Nobuya Watabe, Nagoya, JP;
Hideki Saito, Anjo, JP;
Tomohiro Kuno, Nagoya, JP;
Takashi Saitou, Okazaki, JP;
Akira Takaoka, Okazaki, JP;
Nobuya Watabe, Nagoya, JP;
Hideki Saito, Anjo, JP;
Tomohiro Kuno, Nagoya, JP;
Denso Corporation, Kariya, Aichi-Pref., JP;
Nippon Soken, Inc., Nishio, Aichi-Pref., JP;
Abstract
A batteryless tire inflation pressure detecting apparatus includes, on the body of a vehicle, antennas and a transmitter transmitting radio waves through the antennas. The apparatus also includes, on each wheel of the vehicle, a pressure sensor sensing the pressure of a tire, a transceiver, and a charging unit powering the pressure sensor and the transceiver. The charging unit is charged with electric power induced by a corresponding one of the radio waves received by the transceiver. The apparatus further includes, on the body of the vehicle, a receiver receiving pressure signals transmitted by the transceivers, a pressure determiner determining the pressures of the tires based on the pressure signals, and a controller. To minimize influence of the radio waves on neighboring devices, the controller controls the transmitter so that least two of the radio waves are transmitted at different times, or at the same with a phase difference therebetween.