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. 01, 1989
Filed:
Jun. 02, 1988
Applicant:
Inventors:
Assignee:
Showa Aluminum Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K / ; B23K / ; F28D / ; F28D / ;
U.S. Cl.
CPC ...
228183 ; 228209 ; 228223 ; 228254 ; 22826317 ; 228226 ; 204 33 ; 204 371 ; 204 384 ;
Abstract
A method for producing corrosion resistance heat exchangers having a plurality of aluminum tubular elements and fin members, the method comprising immersing the tubular elements in a bath with passing an electric current so that the surfaces thereof are covered with zinc layers of 0.3 .mu.m or more in thickness; combining the zinc plated tubular elements with fin members covered with a brazing sheet so that a core is provisionally formed; painting the provisional core with a non-corrosive flux; and placing the provisional core in a furnace to braze the fin members to the tubular elements, and also to enable the zinc layers to diffuse over the surfaces of the tubular elements.