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. 25, 1990
Filed:
Aug. 10, 1989
Applicant:
Inventors:
Christian Gruene, Furstenfeldbruck, DE;
Karl Maier, Karlsfeld, DE;
Assignee:
MTU Motoren- und Turbinen-Union Munchen GmbH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
228183 ; 29890043 ; 228155 ;
Abstract
A process of manufacturing a spacer element for spaced heat exchange tubes of a heat exchanger in which the tubes are of elliptical cross section and arranged in rows and columns. In the process a band of stranded interwoven fine wires are wound between and on the surfaces of the spaced heat exchange tubes and is fused to the tubes at the regions of contact therewith by a heating operation to form a spacer for holding the tubes in spaced relation. The heating operation can be carried out by heating the tubes and band in an oven, either in a vacuum or with a protective gas.