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. 10, 2012
Filed:
Jul. 18, 2006
Applicants:
Mamoru Houfuku, Inashiki-gun, JP;
Ken Horiguchi, Tsuchiura, JP;
Kenichi Inui, Tsuchiura, JP;
Inventors:
Assignee:
Hitachi Cable, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F28F 1/36 (2006.01); F28F 19/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A heat transfer pipewith grooved inner surface is provided with a pipe bodyhaving a pipe axis line ◯ as a center axis line, a plurality of first finseach having a fin height Hf, formed by providing a plurality of spiral groovesat an inner surface of the pipe bodyalong the pipe axis line ◯ and at least a second finhaving a fin height hf, provided at a groove bottom of at least one of the spiral groove. The fin height hf and a torsion angle α of the second finare determined respectively to satisfy the following conditions:/15≦/3 and α=β,