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. 30, 2018
Filed:
Jul. 30, 2013
Jfe Civil Engineering & Construction Corp., Tokyo, JP;
Jfe Steel Corporation, Tokyo, JP;
Kazuaki Miyagawa, Tokyo, JP;
Wataru Kitamura, Tokyo, JP;
Tomohiro Kinoshita, Tokyo, JP;
Takumi Ishii, Tokyo, JP;
Abstract
A pin joint type structural member, made of double steel pipe consisting of a main pipe and a stiffening pipe, restrains buckling so as to be stable under axial compressive force. A clearance between the stiffening pipeand the reinforcing member is determined so that a ratio (P/P) of the reinforcing member contact force with the stiffening pipe inner surface at the endof a counter-clevis side, to the reinforcing member contact force with the stiffening pipe inner surface at the endof the clevis side may be 0.40 to 0.65 when the reinforcing memberinclines to the main pipedue to the axial force acting on the main pipe. In addition, a length Lthat the stiffening pipeoverlaps with the reinforcing memberis at least 1.1 times as large as the reinforcing member outer diameter at the overlapping portion.