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. 15, 1981
Filed:
Jul. 14, 1980
Applicant:
Inventor:
Jack S Yampolsky, San Diego, CA (US);
Assignee:
General Atomic Company, San Diego, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F28F / ; F28F / ;
U.S. Cl.
CPC ...
165179 ; 138 38 ; 138154 ; 138173 ; 228145 ;
Abstract
A spirally fluted metallic heat transfer tube is disclosed wherein the finished tube has improved heat transfer performance through the provision of a predetermined number range of multiple start continuous helical flutes formed along its longitudinal length, the flutes having specific helix angle relation and flute height to tube hydraulic diameter ratio so as to establish a ratio of thermal diffusivity to momentum diffusivity greater than 1.