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:
May. 10, 2005
Filed:
Nov. 07, 2003
Applicants:
Shoichi Sakai, Gunma, JP;
Futoshi Ichiyanagi, Gunma, JP;
Inventors:
Shoichi Sakai, Gunma, JP;
Futoshi Ichiyanagi, Gunma, JP;
Assignee:
Hitachi, Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N027/407 ;
U.S. Cl.
CPC ...
Abstract
An air/fuel-ratio detecting apparatus includes a compact layer arranged on the outer surface of a solid electrolyte layer to externally conceal a gas diffusion layer, solid electrolyte layer, outer measuring electrode, and reference electrode to restrain entry of exhaust gas. A gas introduction window is formed in the compact layer to have a predetermined width. The gas introduction window allows entry of exhaust gas toward the gas diffusion layer and the outer measuring electrode in the range of an opening width of the gas introduction window.