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. 23, 2012
Filed:
Mar. 24, 2008
Yoshinobu Goto, Nagoya, JP;
Hisakazu Okajima, Nishikasugai-Gun, JP;
Yoshinobu Goto, Nagoya, JP;
Hisakazu Okajima, Nishikasugai-Gun, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A heating device made of ceramics includes: a plate-like heating base having a heating surface; and a hollow cylindrical support member bonded to a back surface of the heating base. A concave surface portion that connects the back surface of the heating base and an outer surface of the support member smoothly to each other is formed in the vicinity of an outer end of a bonding interface between the heating base and the support member. On a cross section including an axis of the support member, the concave surface portion has a curved line of an arc of a ellipsoid in which a minor axis direction is parallel to an axis direction of the support member.