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:
Jul. 14, 2009
Filed:
Aug. 27, 2003
Takafumi Shichida, Nagoya, JP;
Takaya Yoshikawa, Nagoya, JP;
Takashi Nakashima, Nagoya, JP;
Satoshi Ishikawa, Nagoya, JP;
Takafumi Shichida, Nagoya, JP;
Takaya Yoshikawa, Nagoya, JP;
Takashi Nakashima, Nagoya, JP;
Satoshi Ishikawa, Nagoya, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A gas sensor is constructed as follows. A protector () covering around a gas sensing element () has an inner hollow-cylindrical portion () and an outer hollow-cylindrical portion () that is provided coaxially with the inner hollow-cylindrical portion () with an air space () in between. Outer-wall gas inlet openings () are formed in the outer hollow-cylindrical portion (), and guiding bodies () extending inward are attached to the outer-wall gas inlet openings (). Inner-wall gas inlet openings () are formed in the inner hollow-cylindrical portion () at positions nearer to the gas sensing element () than the outer-wall gas inlet openings (). A side wall () face of the inner hollow-cylindrical portion () opposite the outer-wall gas inlet openings () is formed so as to be parallel to a side wall () of the outer-hollow cylindrical portion () or so as to have a slop-like shape with a diameter enlarging in the axial direction toward a bottom wall () of the protector (). A discharge opening () for a gas to be measured is formed in the bottom wall ().