Patents by Inventor Suguru Yamaguchi

Suguru Yamaguchi 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).

  • Publication number: 20100163276
    Abstract: A silver-coated material for a movable contact component is provided, in which a conductive base member (1) composed of iron or an iron alloy is coated with an underlayer (2) composed of nickel or a nickel alloy of 0.005 to 0.5 ?m thick, the underlayer (2) is coated with an intermediate layer (3) composed of palladium, a palladium alloy or a silver tin alloy of 0.01 to 0.5 ?m thick and the intermediate layer (3) is coated with an outermost surface layer (4) composed of silver or a silver alloy.
    Type: Application
    Filed: March 25, 2008
    Publication date: July 1, 2010
    Inventors: Suguru Yamaguchi, Yoshiaki Kobayashi
  • Publication number: 20100078936
    Abstract: A threaded joint for steel pipes constituted by a pin having male threads and a box having female threads is improved with respect to ease of insertion of the pin and galling resistance of the threaded portions. The stabbing flanks of the threads in a complete thread portion of one of the pin and a box has a two-step stabbing shape having a chamfer. The two-step stabbing shape has a stabbing flank angle ? of 5-45° and a chamfer angle ? of 20-60°. The ratio h/H of the chamfer height h to the thread height H of the pin is 0.25-0.50, or the ratio of the cross-sectional area of the chamfered portion to the overall cross-sectional area of the stabbing flank is made at least a value corresponding to a chamfer height ratio h/H of 0.25 and at most a value corresponding to a chamfer height ratio of 0.50.
    Type: Application
    Filed: October 1, 2009
    Publication date: April 1, 2010
    Inventors: Keiichi Nakamura, Takahiro Hamamoto, Masaaki Sugino, Suguru Yamaguchi
  • Patent number: D541735
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: May 1, 2007
    Assignee: Bridgestone Corporation
    Inventor: Suguru Yamaguchi
  • Patent number: D557654
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: December 18, 2007
    Assignee: Bridgestone Corporation
    Inventor: Suguru Yamaguchi
  • Patent number: D605581
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: December 8, 2009
    Assignee: Bridgestone Corporation
    Inventors: Suguru Yamaguchi, Seiichi Toda
  • Patent number: D620429
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: July 27, 2010
    Assignee: Bridgestone Corporation
    Inventor: Suguru Yamaguchi