Patents by Inventor Atsumi Imai

Atsumi Imai 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).

  • Rotary grinding tool and its production method
    Patent number: 8845400
    Abstract: An inexpensive rotary grinding tool with reduced noise level of the grinding is provided. The rotary grinding tool comprises a metal disk having a grinding surface on at least a part of its surface and a holder for supporting the metal disk. The grinding surface has hard grains having a Mohs hardness in excess of 9 brazed thereon at a surface density of at least 20 grains/cm2. The holder has at its center a securing means for securing the holder on rotary shaft of a rotary drive unit. The holder and the metal disk are joined together to constitute the rotary grinding tool.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: September 30, 2014
    Assignees: Nippon Steel & Sumikin Anti-Corrosion Co., Ltd., Dai Nippon Toryo Co., Ltd
    Inventors: Atsumi Imai, Takehide Aiga, Masanori Nagai, Takayuki Sato, Kenji Fujimoto, Tsuyoshi Matsumoto, Hiroshi Kihira
  • ROTARY GRINDING TOOL AND ITS PRODUCTION METHOD
    Publication number: 20120270484
    Abstract: An inexpensive rotary grinding tool with reduced noise level of the grinding is provided. The rotary grinding tool comprises a metal disk having a grinding surface on at least a part of its surface and a holder for supporting the metal disk. The grinding surface has hard grains having a Mohs hardness in excess of 9 brazed thereon at a surface density of at least 20 grains/cm2. The holder has at its center a securing means for securing the holder on rotary shaft of a rotary drive unit. The holder and the metal disk are joined together to constitute the rotary grinding tool.
    Type: Application
    Filed: December 21, 2010
    Publication date: October 25, 2012
    Applicants: DAI NIPPON TORYO CO., LTD, NITTETSU ANTI-CORROSION CO., LTD
    Inventors: Atsumi Imai, Takehide Aiga, Masanori Nagai, Takayuki Sato, Kenji Fujimoto, Tsuyoshi Matsumoto, Hiroshi Kihira
  • METHOD FOR APPLYING HIGHLY DURABLE REPAIR-COATING
    Publication number: 20090304917
    Abstract: A highly durable repair-coating method is provided, which permits the simple, fast, efficient and effective removal of thick rust and fixed rust generated on a steel structure having a large area such as a bridge and an intermediate iron product, under storage, which can ensure high working properties and high safety while reducing the processing cost, and which can likewise ensure high quality repairing and the subsequent improved duration of the repaired and coated articles.
    Type: Application
    Filed: April 18, 2007
    Publication date: December 10, 2009
    Applicant: DAI NIPPON TORYO CO., LTD.
    Inventors: Hiroshi Kihira, Takehide Aiga, Atsumi Imai, Kanjiro Hiramatsu, Yoshihiko Mitsuzuka, Masanori Nagai, Takayuki Sato, Tsuyoshi Matsumoto