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. 18, 2014
Filed:
May. 17, 2011
Applicants:
Takayuki Sekiya, Nissin, JP;
Kei Kosaka, Nagoya, JP;
Shodai Hirata, Nagoya, JP;
Inventors:
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 27/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The sensor element, which can detect the concentration of a specified gas, is held with a housing with a front end thereof exposed. A protective cover includes an inner cover and an outer cover, and secured to the housing. A ratio φ1/φ2 is set to a range from 0.6 to 0.9, where φ1 represents an outer diameter of a portion where an inner gas aperture is formed in the inner cover, and φ2 represents an inner diameter of a portion where an outer gas aperture is formed in the outer cover.