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. 09, 1990
Filed:
Jun. 29, 1989
Akihiko Yoshida, Iwakura, JP;
Yoshizumi Nakasuji, Nagoya, JP;
NGK Insulators, Ltd., , JP;
Abstract
Ceramic-metal composite bodies and a process for the production thereof are disclosed. The ceramic-metal composite body includes a metallic member and a ceramic member which are integrally joined together by fitting a projection formed on the ceramic member to a recess formed in the metallic member. The projection of the ceramic member is fitted and joined into the recess of the metallic member in a vessel of which the inside is kept at an atmosphere having a pressure lower than an atmospheric pressure. The pressure of air remaining in a space left between the recess and the fitted projection is lower than that of the air in the space when the projection is fitted into the recess in the atmospheric pressure. An apparatus for fitting and joining the projection of the ceramic member to the recess of the metallic member is also disclosed, which includes a pressure-reducible vessel which is provided with a space for receiving at least the projection of the ceramic member and the recess of the metallic member, a sealing structure including O-rings or the like, a pipe opening for exhausting air inside the vessel, and a movable push rod for pressing and fitting the projection of the ceramic member into the recess of the metallic member.