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:
Dec. 12, 1989
Filed:
Apr. 20, 1988
Leonid G Puzrin, Kiev, SU;
Miron G Atroshenko, Kiev, SU;
Vladimir L Yaremenko, Kiev, SU;
Jury Y Ischenko, Kievskaya oblast, SU;
Pavel S Nefedov, Donetskaya oblast, Zhdanov, SU;
Ivan G Pescherin, Donetskaya oblast, Zhdanov, SU;
Ilya P Serebryanik, Donetskaya oblast, Zhdanov, SU;
Evgeny I Polev, Donetskaya oblast, Zhdanov, SU;
Other;
Abstract
A method of brazing of an outer carbon steel shell to an inner stainless steel shell, in which a stainless steel sheet material of the inner shell is rolled up with an overlap and arranged with a clearance inside the outer shell, braze material is placed in the clearance, walls of the rolled sheet material of the inner shell are forced to the inner surface of the outer shell, longitudinal edges of the sheet material of the inner shell are weld-joined to form the inner shell, air is evacuated from the clearance, and ends of the outer and inner shells are joined by circular vacuum-tight corner welds, one leg of which extends radially and has a length equal to at least one thickness of the inner shell, whereas the length of the other leg, which extends longitudinally, is equal to at least twice the thickness of the wall of the inner shell and said inner and outer shells are brazed in a furnace forming after cooling a bimetallic cylindrical article.