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, 1983
Filed:
Jul. 16, 1981
Kabushiki Kaisha Meidensha, Tokyo, JP;
Abstract
The invention provides a vacuum interrupter in which an evacuated envelope includes a cylindrical housing made of a metallic material, disc-shaped upper and lower end plates made of inorganic insulating material and stationary and movable contact rods. The envelope of the vacuum interrupter is manufactured by brazing the end plates to the housing by using a sealing member made of a plastically deformable metallic material which is deformed by thermal stress generated during a cooling process after hermetic brazing. The coefficient of the housing differs from that of the upper and lower end plates. According to the present invention, the sealing performance can be enhanced, even when the thermal coefficient of the housing differs from those of the end plates, since the sealing member is used.