Patents by Inventor Hideyuki KOISHI

Hideyuki KOISHI 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).

  • Patent number: 10774884
    Abstract: Outer plates have a doughnut-like disk shape and are attached to the inner circumferential surface of a case member. On the other hand, inner plates have a substantially arc shape and are swingably supported about a position at a distance from the center of rotation of a shaft. The inner plates are held at a first position, at which the interlocking area between the outer plates and the inner plates is small, by a tension coil spring when the relative rotational speed between the case member and the shaft is small, and, when the relative rotational speed between the case member and the shaft exceeds a predetermined value are pivotally moved toward the outer plates by the shearing force of a viscous fluid and held at a second position at which the interlocking area between the movable plates and the first plates is large.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: September 15, 2020
    Assignees: WAKAYAMA PREFECTURE, ACRO NAINEN CO., LTD.
    Inventors: Hideyuki Koishi, Hitoshi Torikai, Satoshi Katsumoto, Yoshinori Shimamoto
  • Publication number: 20190093713
    Abstract: Outer plates have a doughnut-like disk shape and are attached to the inner circumferential surface of a case member. On the other hand, inner plates have a substantially arc shape and are swingably supported about a position at a distance from the center of rotation of a shaft. The inner plates are held at a first position, at which the interlocking area between the outer plates and the inner plates is small, by a tension coil spring when the relative rotational speed between the case member and the shaft is small, and, when the relative rotational speed between the case member and the shaft exceeds a predetermined value are pivotally moved toward the outer plates by the shearing force of a viscous fluid and held at a second position at which the interlocking area between the movable plates and the first plates is large.
    Type: Application
    Filed: November 27, 2018
    Publication date: March 28, 2019
    Inventors: Hideyuki KOISHI, Hitoshi TORIKAI, Satoshi KATSUMOTO, Yoshinori SHIMAMOTO