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:
Sep. 19, 1989
Filed:
Mar. 10, 1987
Applicant:
Inventor:
Hermann Gemeinhardt, Obernburg, DE;
Assignee:
Akzo N.V., , NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F28F / ;
U.S. Cl.
CPC ...
165173 ; 165905 ;
Abstract
A heat exchanger comprises at least one group of tubes of thermoplastic synthetic material, the tube ends of a group being packed closely together and the tube ends of adjacent tubes being fused to one another on their end face. Preferably, the tube ends are arranged in a sleeve enclosing the group of tubes, the external tube ends being fused with the sleeve. The heat exchangers are made in such a way that the tube ends are assembled together and inserted into a sleeve. The tubes are placed in vertical position, with their ends essentially upward. Heat is then supplied to the tube ends from above, causing the tube ends to expand and occasionally to fuse with the sleeve.