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:
Jul. 19, 1983
Filed:
Jul. 23, 1980
Applicant:
Inventor:
Masao Sakai, Mobara, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72329 ; 72334 ; 72336 ; 72347 ;
Abstract
A metal sealing member comprising a metal cylindrical member, one end thereof being adapted to be soldered to another member to form a hermetic sealing structure is manufactured by squeezing a metal plate into a cup-shaped member, forming an annular recess at an opening of the cup-shaped member or forming a circular projection at a bottom thereof, and cutting the annular recess or a portion surrounding the circular projection.