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:
Oct. 07, 2008
Filed:
Mar. 20, 2007
Applicants:
Yutaka Unno, Handa, JP;
Yoshinobu Goto, Nagoya, JP;
Inventors:
Yutaka Unno, Handa, JP;
Yoshinobu Goto, Nagoya, JP;
Assignee:
NGK Insulators, Ltd., Nagoya-Shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 1/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A heating device includes a substantially cylindrical shaft joined to a joint surface of a plate-shaped ceramic substrate opposite to a heating surface, the ceramic substrate including a resistance heating element embedded in the ceramic substrate. The shaft includes a flange portion formed in the end joined to the ceramic substrate and a first cylindrical portion connecting to the flange portion, and a ratio DDof an inner diameter Dof a joint area in the flange portion and an outer diameter Dof the first cylindrical portion is not less than 92%.