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. 20, 2007
Filed:
Dec. 23, 2004
Applicants:
Hirofumi Noda, Kariya, JP;
Takashi Kojima, Kasugai, JP;
Inventors:
Hirofumi Noda, Kariya, JP;
Takashi Kojima, Kasugai, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An improved structure of a gas sensor designed to withstand physical impact which may result in damage such as cracks to a sensor element built in the gas sensor. Specifically, the gas sensor includes a buffer provided by a clearance between an air cover a porcelain insulator. The clearance is in a range of 1 to 2.5 mm at a minimum. The gas sensor may alternatively have a harder portion in the air cover which has a Vickers hardness of 200 to 400. The gas sensor may alternatively have a rigidity enhancer in the air cover which works to provides an increased rigidity to the air cover.