F - Mech Eng,Light,Heat,Weapons – 28 – F
Patent
F - Mech Eng,Light,Heat,Weapons
28
F
F28F 1/40 (2006.01)
Patent
CA 2693509
A heat exchange tube is constructed by forming, on a cylindrical tube peripheral wall, a plurality of projecting portions which project to an inside of the tube peripheral wall, and which are formed by pushing. The plurality of projecting portions are formed, respectively, into conical shapes across a tube axis, and are arranged along virtual spirals on the tube peripheral wall. Accordingly, it is possible to provide a heat exchange tube which facilitates formation of a plurality of projecting portions with the thickness hardly changed and without formation of protruded portions, and which is capable of contributing to enhancement of heat exchanging efficiency.
Hirokawa Isao
Kondo Toshihiro
Nakayama Tetsuaki
Naoi Atsumu
Ushiyama Hideyuki
Honda Motor Co. Ltd.
Smart & Biggar
Yutaka Giken Co. Ltd.
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