Patents by Inventor Takeyuki Namiki

Takeyuki Namiki 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).

  • Graphite-copper composite electrode material and electrical discharge machining electrode using the material
    Patent number: 10357838
    Abstract: An object is to provide a graphite-copper composite electrode material that is capable of reducing electrode wear to a practically usable level and to provide an electrical discharge machining electrode using the material. A graphite-copper composite electrode material includes a substrate comprising a graphite material and having pores, and copper impregnated in the pores of the substrate, the electrode material having an electrical resistivity of 2.5 ??m or less, preferably 1.5 ??m or less, more preferably 1.0 ??m or less. It is desirable that the substrate comprising the graphite material have an anisotropy ratio of 1.2 or less. It is desirable that an impregnation rate ? of the copper in the electrode material is 13% or greater. It is desirable that the substrate comprising the graphite material have a bulk density of from 1.40 Mg/m3 to 1.85 Mg/m3.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: July 23, 2019
    Assignee: TOYO TANSO CO., LTD.
    Inventors: Masao Kanda, Naoto Ohta, Kiyoshi Saito, Masaki Okada, Motoki Onishi, Takeyuki Namiki
  • GRAPHITE-COPPER COMPOSITE ELECTRODE MATERIAL AND ELECTRICAL DISCHARGE MACHINING ELECTRODE USING THE MATERIAL
    Publication number: 20170043423
    Abstract: An object is to provide a graphite-copper composite electrode material that is capable of reducing electrode wear to a practically usable level and to provide an electrical discharge machining electrode using the material. A graphite-copper composite electrode material includes a substrate comprising a graphite material and having pores, and copper impregnated in the pores of the substrate, the electrode material having an electrical resistivity of 2.5 ??m or less, preferably 1.5 ??m or less, more preferably 1.0 ??m or less. It is desirable that the substrate comprising the graphite material have an anisotropy ratio of 1.2 or less. It is desirable that an impregnation rate ? of the copper in the electrode material is 13% or greater. It is desirable that the substrate comprising the graphite material have a bulk density of from 1.40 Mg/m3 to 1.85 Mg/m3.
    Type: Application
    Filed: April 1, 2015
    Publication date: February 16, 2017
    Applicant: TOYO TANSO CO., LTD.
    Inventors: Masao Kanda, Naoto Ohta, Kiyoshi Saito, Masaki Okada, Motoki Onishi, Takeyuki Namiki