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:
Aug. 24, 2021
Filed:
Jan. 29, 2016
Applicant:
Nippon Steel Corporation, Tokyo, JP;
Inventors:
Shinnosuke Nishijima, Tokyo, JP;
Kouki Tomimura, Tokyo, JP;
Assignee:
NIPPON STEEL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L 23/08 (2006.01); B21D 17/04 (2006.01); F16L 17/04 (2006.01); B21H 1/18 (2006.01); F16L 21/08 (2006.01); F16L 21/06 (2006.01);
U.S. Cl.
CPC ...
F16L 23/08 (2013.01); B21D 17/04 (2013.01); B21H 1/18 (2013.01); F16L 17/04 (2013.01); F16L 21/08 (2013.01); F16L 21/065 (2013.01);
Abstract
A tubular structure includes a tube member provided with annular protrusions, on a side of an insertion opening that is a tube end part or a receiving opening and, on an outer circumference of the tube member, ring members, arranged on an opposite side of the tube end part with respect to the annular protrusions, having two side surfaces that are vertical with respect to an axis of the tube member.