Patents by Inventor Takeo Tsumuraya

Takeo Tsumuraya 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).

  • Polishing method for inner surface of tubular brittle material and tubular brittle material obtained by polishing method
    Patent number: 7238089
    Abstract: An object of the present invention is to provide a polishing method for producing, in a relatively short period of time, a tubular brittle material having an inner surface of high surface precision with a maximum roughness Rmax of 0.1 ?m or smaller and a center line average roughness Ra of 0.01 ?m or smaller, and to provide a tubular brittle material with high precision using said polishing method. The polishing method according to the invention is characterized by that the inner surface of the tubular material being pre-cut into a tubular shape using a honing machine is further polished with a sheet material having diamond abrasives attached thereon. Also claimed is a tubular brittle material obtained by said polishing method.
    Type: Grant
    Filed: February 11, 2004
    Date of Patent: July 3, 2007
    Assignee: Heraeus Tenevo GmbH
    Inventors: Takeo Tsumuraya, Masanori Suzuki
  • Polishing method for inner surface of tubular brittle material and tubular brittle material obtained by polishing method
    Publication number: 20060223427
    Abstract: An object of the present invention is to provide a polishing method for producing, in a relatively short period of time, a tubular brittle material having an inner surface of high surface precision with a maximum roughness Rmax of 0.1 ?m or smaller and a center line average roughness Ra of 0.01 ?m or smaller, and to provide a tubular brittle material with high precision using said polishing method. The polishing method according to the invention is characterized by that the inner surface of the tubular material being pre-cut into a tubular shape using a honing machine is further polished with a sheet material having diamond abrasives attached thereon. Also claimed is a tubular brittle material obtained by said polishing method.
    Type: Application
    Filed: February 11, 2004
    Publication date: October 5, 2006
    Applicants: HERAEUS TENEVO GmbH, SHIN-ETSU QUARTZ PRODUCTS CO., LTD.
    Inventors: Takeo Tsumuraya, Masanori Suzuki