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:
Aug. 08, 2006
Filed:
Feb. 10, 2003
Keigo Mizutani, Okazaki, JP;
Kazuhiko Yoshida, Takahama, JP;
Hidetaka Hayashi, Nagoya, JP;
Masayoshi Iwase, Anjo, JP;
Kazuo Tojima, Toyota, JP;
Keigo Mizutani, Okazaki, JP;
Kazuhiko Yoshida, Takahama, JP;
Hidetaka Hayashi, Nagoya, JP;
Masayoshi Iwase, Anjo, JP;
Kazuo Tojima, Toyota, JP;
Denso Corporation, Kariya, JP;
Nippon Soken, Inc., Nishio, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
A hydrogen sensor which may be employed in an overcharge/overdischarge detector for a battery and a hydrogen leakage detector for a fuel cell is provided. The hydrogen sensor includes a sensor element and a diffused resistor member. The gas to be measured passes through the diffused resistor member and reaches the sensor element. The sensor element outputs a signal indicative of the concentration of hydrogen contained in the gas as a function of a decrease in concentration of oxygen contained in the gas arising from reaction of the hydrogen on the oxygen. The diffused resistor member is so designed that speeds of diffusion of the hydrogen and the oxygen when passing through the diffused resistor member are different from each other for increasing the sensitivity of measurement of the concentration of hydrogen.