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:
Aug. 05, 1997
Filed:
Dec. 02, 1991
Applicant:
Inventors:
Akihiro Watanabe, Hashima, JP;
Keiichi Asai, Kasugai, JP;
Yasunori Matsuura, Kasugai, JP;
Nagahiro Kawano, Kurume, JP;
Masafumi Sugi, Yame, JP;
Assignee:
NGK Instulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428 344 ; 428 346 ; 428 347 ; 428 357 ; 428 359 ; 428 368 ; 428212 ; 428217 ; 4284256 ; 428448 ; 428451 ; 428493 ; 428516 ; 428518 ; 1741 / ; 1741 / ;
Abstract
An explosion-proof porcelain housing for use in a gas-filled insulating apparatus, comprising a porcelain housing body, and a first and second films. The first film is made of a first insulating material having low hardness and high elasticity, and is bonded to an inner surface of the porcelain housing body. The second film is made of a second insulating material having high hardness and high mechanical strength, and is bonded to an inner surface of the first film. A process for producing such an explosion-proof porcelain housing is also disclosed.