Patents by Inventor Kyohei Umetsu

Kyohei Umetsu 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).

  • Seal ring
    Patent number: 7766339
    Abstract: A seal ring for sealing an annular clearance between two members, which are made rotatable relative to each other. The seal ring is provided with a relief 5 throughout the circumference of a sliding face side to confront the side wall face 72 of an annular groove 71. This relief 5 is set to have a radially smaller width in the vicinity of a separate portion 2 and a radially larger width at a position apart from the separate portion 2, and the portion of the relief 5 to transit from the narrower portion to the wider portion is set to have a gradually changing width.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: August 3, 2010
    Assignee: NOK Corporation
    Inventors: Kyohei Umetsu, Nobuyuki Eguchi
  • Seal ring
    Patent number: 7722051
    Abstract: A seal ring for sealing an annular clearance between two members, which are made rotatable relative to each other. The seal ring is provided with a relief 5 throughout the circumference of a sliding face side to confront the side wall face 72 of an annular groove 71. This relief 5 is set to have a radially smaller width in the vicinity of a separate portion 2 and a radially larger width at a position apart from the separate portion 2, and the portion of the relief 5 to transit from the narrower portion to the wider portion is set to have a gradually changing width.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: May 25, 2010
    Assignee: NOK Corporation
    Inventors: Kyohei Umetsu, Nobuyuki Eguchi
  • Seal ring
    Patent number: 7654536
    Abstract: A seal ring for sealing an annular clearance between two members, which are made rotatable relative to each other. The seal ring is provided with a relief 5 throughout the circumference of a sliding face side to confront the side wall face 72 of an annular groove 71. This relief 5 is set to have a radially smaller width in the vicinity of a separate portion 2 and a radially larger width at a position apart from the separate portion 2, and the portion of the relief 5 to transit from the narrower portion to the wider portion is set to have a gradually changing width.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: February 2, 2010
    Assignee: NOK Corporation
    Inventors: Kyohei Umetsu, Nobuyuki Eguchi
  • Seal ring
    Publication number: 20080023919
    Abstract: A seal ring for sealing an annular clearance between two members, which are made rotatable relative to each other. The seal ring is provided with a relief 5 throughout the circumference of a sliding face side to confront the side wall face 72 of an annular groove 71. This relief 5 is set to have a radially smaller width in the vicinity of a separate portion 2 and a radially larger width at a position apart from the separate portion 2, and the portion of the relief 5 to transit from the narrower portion to the wider portion is set to have a gradually changing width.
    Type: Application
    Filed: July 20, 2007
    Publication date: January 31, 2008
    Inventors: Kyohei Umetsu, Nobuyuki Eguchi
  • Seal ring
    Publication number: 20060055120
    Abstract: A seal ring for sealing an annular clearance between two members, which are made rotatable relative to each other. The seal ring is provided with a relief 5 throughout the circumference of a sliding face side to confront the side wall face 72 of an annular groove 71. This relief 5 is set to have a radially smaller width in the vicinity of a separate portion 2 and a radially larger width at a position apart from the separate portion 2, and the portion of the relief 5 to transit from the narrower portion to the wider portion is set to have a gradually changing width.
    Type: Application
    Filed: May 29, 2004
    Publication date: March 16, 2006
    Inventors: Kyohei Umetsu, Nobuyuki Eguchi