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:
Mar. 03, 1992
Filed:
Nov. 21, 1990
Applicant:
Inventors:
Elmo W Geppelt, Tulsa, OK (US);
William H Poore, Tulsa, OK (US);
Assignee:
G. P. Industries, Inc., Tulsa, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
29890048 ; 72371 ;
Abstract
An improved heat exchanger tube is provided in which the tube has one or more paralleled integral spirals formed in the tube wall providing on the exterior surface one or more convoluted spiral recesses of selected pitch, and fin members affixed to the spiral tube providing a tube having greatly increased external surface area, per unit of length and a convoluted, laminar flow breaking, interior surface.