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. 08, 2013
Filed:
Oct. 14, 2008
Katsutoshi Maruyama, Tsubame, JP;
Katsutoshi Maruyama, Tsubame, JP;
K. K. ENDO Seisakusho, Tsubame-shi, JP;
Abstract
There is provided a tube having fine irregularities formed on the outer peripheral face or inner peripheral face. The tube has a hollow tube body made of metal with uniform wall thickness of 20 to 50 μm. The tube is obtained by plastic working through spinning, in which a metallic ring-shaped metal original body () is rotated together with a rotation support body () about the center axis of the metal original body (), while being pressed by a top or tops () disposed on the outer periphery of the metal original body (). Fine irregularities () are formed on the outer peripheral face or the inner peripheral face of the metal tube at a substantially fixed interval. Both ends of the metal original body () worked by spinning are cut to yield a tube ().