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:
Sep. 10, 2019
Filed:
Sep. 20, 2016
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Masaaki Mizumura, Tokyo, JP;
Yukihisa Kuriyama, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
The present invention provides a new bending apparatus and bending method of a tube material which makes it possible to achieve all of bending by a large bending radius not requiring large scale equipment or die, bending resistant to wrinkling and buckling at an inner side of the bending, and bending with a high productivity, that is, a ram bending apparatus using a punchand a set of rollsfor three-point bending of a tube material wherein the punchhas a grooveof a width of the width of a circular tubeor more and wherein the set of rollsare supported by a frame. The rollscan freely move on the framein directions away from each other in a state contacting the punch. The framehas a hollow spaceenabling free movement of the descending punchand the circular tubebent along with this during the bending of the circular tube