Patents by Inventor Kaoru Takanashi

Kaoru Takanashi 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).

  • Threaded joint for steel pipes
    Patent number: 7770935
    Abstract: A threaded joint for steel pipes comprises a pin (1) and a box (2) each having a threaded portion (3a or 3b) and an unthreaded metal-to-metal contact portion (4a or 4b) as contact surfaces which contact each other when the joint is fastened. The contact surfaces (3a and 4a and/or 3b and 4b) of at least one of the pin (1) and the box (2) are coated with a lower layer of a solid lubricating coating containing a solid lubricating powder (e.g., molybdenum disulfide, tungsten disulfide, or graphite) and a binder (e.g., an epoxy or other organic resin) and an upper layer of a solid corrosion protective coating formed by an organic resin which does not contain solid particles.
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: August 10, 2010
    Assignees: Sumitomo Metal Industries, Ltd., Vallourec Mannesmann Oil & Gas France
    Inventors: Ryuichi Imai, Kunio Goto, Kaoru Takanashi, Yasuhiro Ogawa
  • Threaded joint for steel pipes
    Publication number: 20060197343
    Abstract: A threaded joint for steel pipes comprises a pin (1) and a box (2) each having a threaded portion (3a or 3b) and an unthreaded metal-to-metal contact portion (4a or 4b) as contact surfaces which contact each other when the joint is fastened. The contact surfaces (3a and 4a and/or 3b and 4b) of at least one of the pin (1) and the box (2) are coated with a lower layer of a solid lubricating coating containing a solid lubricating powder (e.g., molybdenum disulfide, tungsten disulfide, or graphite) and a binder (e.g., an epoxy or other organic resin) and an upper layer of a solid corrosion protective coating formed by an organic resin which does not contain solid particles.
    Type: Application
    Filed: January 11, 2006
    Publication date: September 7, 2006
    Inventors: Ryuichi Imai, Kunio Goto, Kaoru Takanashi, Yasuhiro Ogawa