Patents by Inventor Kohei KURAMOTO

Kohei KURAMOTO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • WIRE DRAWING DIE
    Publication number: 20230321704
    Abstract: A wire drawing die 1 includes a non-diamond material, is provided with a die hole 1h, and has a reduction 1c and a bearing 1d that is positioned downstream of the reduction 1c. A reduction angle ? which is an opening angle of the die hole 1h at the reduction 1c is less than or equal to 17°, and a surface roughness Ra of the die hole 1h within ±20 ?m from a specific position inside the bearing 1d in a circumferential direction of the die hole 1h that is perpendicular to a wire drawing direction is less than or equal to 0.025 ?m.
    Type: Application
    Filed: August 11, 2021
    Publication date: October 12, 2023
    Applicants: A.L.M.T. Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Kohei KURAMOTO, Takuya KINOSHITA, Yutaka KOBAYASHI, Makoto YUKAWA, Kohichiroh KIMURA, Kentaro SHIRO