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. 01, 1986
Filed:
Mar. 04, 1983
Applicant:
Inventors:
Donald C Stafford, Hinsdale, IL (US);
Tushar K Shah, Cresthill, IL (US);
Vincent F Allo, Warrenville, IL (US);
Assignee:
Chicago Bridge & Iron Company, Oakbrook, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F28D / ; F28F / ; B21D / ; B23K / ;
U.S. Cl.
CPC ...
165115 ; 165118 ; 165173 ; 291574 ; 29727 ; 228183 ; 2281732 ; 2281734 ;
Abstract
A falling film heat exchanger in which a continuous weld circumferentially joins each tube to the outer surface of the upper, and desirably also the lower, tubesheet. The welds seal the crevices between the tubes and tubesheet holes and prevent corrosion. Since the circumferential welds cannot be deposited if the tube ends extend more than about 2 inches past the tubesheet, extensions can be added by welding.