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:
Feb. 26, 1991
Filed:
Aug. 18, 1989
Elmo W Geppelt, Tulsa, OK (US);
William H Poore, Tulsa, OK (US);
G.P. Industries, Inc., , US;
Abstract
A heat pipe for providing enhanced thermal conductivity for transfering heat from a heat sink, such as the earth, to a separate medium, including an elongated, generally vertical, tube closed at each end and having a heat absorption portion adjacent the lower end and a heat dissipation portion adjacent the upper end, the wall of the tube having an integral spiraled groove therein forming internal spiraled valleys and ridges, a refrigerant within the tube having a liquid and a vapor phase wherein the refrigerant is converted to vapor in the heat absorption portion and the vapor is converted to liquid in the heat dissipation portion, the vapor being free to rise within the interior of the tube, the condensed liquid refrigerant flowing downwardly in the tube interior spiraled valleys.