Patents by Inventor Jyunichi YAMASHITA

Jyunichi YAMASHITA 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).

  • Split seal ring
    Patent number: 10907736
    Abstract: A split seal ring includes: an annular main body seal split partially in a circumferential direction; and abutment surfaces provided on split surfaces of the main body seal so as to be joined to each other. Each of the abutment surfaces includes: a first inclined surface extending in a direction intersecting with the circumferential direction; a first horizontal surface extending from one end side of the first inclined surface along the circumferential direction; and a second inclined surface extending from an end of the first horizontal surface opposite to the first inclined surface in the direction intersecting with the circumferential direction. With this configuration, there can be provided a split seal ring having a structure that can improve the sealing performance.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: February 2, 2021
    Assignee: VALQUA, LTD.
    Inventors: Mitsuru Minami, Akira Ueda, Jyunichi Yamashita, Akihiro Nagano, Katsuhisa Umeda
  • SPLIT SEAL RING
    Publication number: 20190203841
    Abstract: A split seal ring includes: an annular main body seal split partially in a circumferential direction; and abutment surfaces provided on split surfaces of the main body seal so as to be joined to each other. Each of the abutment surfaces includes: a first inclined surface extending in a direction intersecting with the circumferential direction; a first horizontal surface extending from one end side of the first inclined surface along the circumferential direction; and a second inclined surface extending from an end of the first horizontal surface opposite to the first inclined surface in the direction intersecting with the circumferential direction. With this configuration, there can be provided a split seal ring having a structure that can improve the sealing performance.
    Type: Application
    Filed: May 12, 2017
    Publication date: July 4, 2019
    Inventors: Mitsuru MINAMI, Akira UEDA, Jyunichi YAMASHITA, Akihiro NAGANO, Katsuhisa UMEDA