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:
Jan. 20, 1981
Filed:
May. 03, 1979
Jun Fujikake, Yamato-Kooriyama, JP;
Furukawa Metals Co., Ltd., Tokyo, JP;
Abstract
A heat transfer tube for condensation easily obtainable through an additional machining process applied to a low fin tube and a method for manufacturing the same. There is formed a toothed wheel-like part having mountain and valley parts alternately and continuously arranged on the outer circumferential fin part of the low fin tube. Each of the mountain parts is formed into a pyramid-like shape having a transverse cross section of approximately a long snare hand drum-like shape in which longer sides are disposed along grooves provided between the fins of the tube and are arranged to be concave curvatures each resembling an arc. The two slanting faces of the mountain part including these longer sides of the pyramid-like shape gradually and smoothly slant from the top of the pyramid to the bottom thereof. The heat transfer tube for condensation is manufactured by carrying out a transforming process applied to the outer circumference of fins of a low fin tube in the longitudinal direction of the fin tube.