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:
Nov. 22, 1994
Filed:
Nov. 19, 1993
Applicant:
Inventors:
Takeyuki Mizuno, Toyohashi, JP;
Hiroyuki Kawase, Nagoya, JP;
Assignee:
NGK Insulators, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
2988921 ; 298892 ; 29525 ;
Abstract
A ceramic-metal composite joint body wherein a projection of a ceramic member is connected to a metal member, having a construction such that a ratio D between a circularity c of an outer portion of the projection and an outer diameter d of the projection: i.e., D=(c/d).times.100(%), is set to less than 0.03%. In this invention, since the ratio D=(c/d).times.100(%) is set to less than 0.03%, a stress concentration generated at a connection edge of the projection of the ceramic member can be reduced, and thus a ceramic-metal composite joint body having good reliability and durability can be obtained.