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. 03, 2025
Filed:
Aug. 11, 2021
A.l.m.t. Corp., Tokyo, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Kohei Kuramoto, Osaka, JP;
Takuya Kinoshita, Sumoto, JP;
Yutaka Kobayashi, Osaka, JP;
Makoto Yukawa, Kato, JP;
Kohichiroh Kimura, Sumoto, JP;
Kentaro Shiro, Kato, JP;
A.L.M.T. Corp., Tokyo, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A wire drawing dieincludes a non-diamond material, is provided with a die hole, and has a reductionand a bearingthat is positioned downstream of the reduction. A reduction angle γ which is an opening angle of the die holeat the reductionis less than or equal to 17°, and a surface roughness Ra of the die holewithin ±20 μm from a specific position inside the bearingin a circumferential direction of the die holethat is perpendicular to a wire drawing direction is less than or equal to 0.025 μm.