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:
Jan. 28, 2014
Filed:
Aug. 11, 2011
Koichi Masuda, Nagoya, JP;
Hirohito Kiyota, Kiyosu, JP;
Nobukazu Ikoma, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
In a gas sensor, when an arithmetical mean roughness Ra of an inner periphery of a metal tubeis 1 μm or less and end portionsandof U-springsare formed as curved contact portions, the end portionsandof the U-springscan slide smoothly along the inner periphery of the metal tube. Therefore, when vibration is applied to the gas sensor, the U-springscan be prevented from being caught in the inner periphery of the metal tube, and the vibration can be absorbed by an elastic function of the U-springs. Even if the gas sensor vibrates, defective contact between a sensor elementand contact fittingsand wear and cracks in the sensor elementare less likely to occur. That is, the gas sensor resistant to vibration can be obtained.