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:
Jun. 07, 2022
Filed:
Jun. 13, 2019
Jfe Steel Corporation, Tokyo, JP;
Takamasa Kawai, Tokyo, JP;
Taro Kanayama, Tokyo, JP;
Masaki Yoshikawa, Tokyo, JP;
Tsuyoshi Yoneyama, Tokyo, JP;
Seigo Goto, Tokyo, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
A threaded joint with excellent tensile strength, comprising: a pin having an externally threaded part comprising a first and second externally threaded sections across a step on an outer periphery on a distal-end side of a first steel pipe or tube; and a box having an internally threaded part comprising a first and second internally threaded sections across the step on an inner periphery on a distal-end side of a second steel pipe or tube, the externally threaded part being screwed to the internally threaded part to join the pin and the box. The threaded joint has a first and second thread sequence with lengths Land Lrespectively, and cross-sectional areas PPBand Bat end positions 4, 5, 6, and 7, respectively, satisfying Formulas (1) and (2): (PB)≤P{L/(L+L)}(1) and (PB)≤B/{L/(L+L)}(2), where (PB)represents Por Bwhichever is smaller.