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:
Apr. 25, 2000
Filed:
Jun. 04, 1999
Applicant:
Inventors:
Yoshihiko Onishi, Tokyo, JP;
Shoichiro Nishitani, Tokyo, JP;
Kazuhiro Arisue, Tokyo, JP;
Hiromu Tomita, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
138 30 ; 138 31 ;
Abstract
A surge absorber assembly comprises a metal case provided with a recess, a metal diaphragm attached to the perimeter of the case to form a back pressure chamber in the recess being charged with high-pressure gas, and a metal plate attached so as to hold the diaphragm against the perimeter of the case to form a damper chamber facing the diaphragm, the case, the diaphragm, and the plate being joined by a weld formed by fusing the respective perimeters thereof, and a groove being formed in at least one of the case and the plate alongside the weld.