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:
Nov. 05, 1985
Filed:
May. 24, 1983
Applicant:
Inventor:
James W Lu, Greendale, WI (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F28F / ;
U.S. Cl.
CPC ...
165151 ;
Abstract
An improved louver pattern for fins of a tube and fin type heat exchanger, in which groups of louvers are formed radially with respect to the tubes, extending from each tube to adjacent tubes. Each louver group consists of a plurality of parallel slits in the fin extending in the radial direction, and defining elongate rectangular portions of the fin therebetween, which are twisted at an angle to form inclined louvers in an otherwise generally planar fin. The louver groups thus formed provide improved turbulence and mixing to break up the viscous or boundary layer of flow across the fin, and to create turbulence and vorticity to further improve mixing of the fluid and heat transfer.