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:
May. 23, 2006
Filed:
Apr. 12, 2002
Applicants:
Pascal Leterrible, Dangu, FR;
Nicolas Avanan, Talmontier, FR;
Inventors:
Pascal Leterrible, Dangu, FR;
Nicolas Avanan, Talmontier, FR;
Assignee:
Trefimetaux, Courbevoie, FR;
Primary Examiner:
Int. Cl.
CPC ...
F28F 1/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
Grooved metal tubes (), of outer diameter De, the tubes being grooved internally with N helical ribs () of an apex angle α, height H, base width Land helical angle β, two consecutive ribs being separated by a flat-bottomed groove () of width L, with a pitch P equal to L+L. These tubes are characterised in that,