Patents by Inventor Taichiro ISHIKAWA

Taichiro ISHIKAWA 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).

  • Multiplate wet clutch
    Patent number: 10544841
    Abstract: Provided is a multiplate wet clutch having capability of preventing damage of an axial groove portion formed in an inner cylindrical portion of a shaft. An inner cylindrical portion 3 of the shaft is formed with an axial groove 75 which is opened to a circumferential groove 53 and with which other members of the multiplate wet clutch for regulating movement of a retaining ring 55 toward axially on the other side are to be engaged. A pressure plate 35 is formed, on a surface 36b axially on the other side thereof, with a recessed portion 77 axially opposed to an opening portion 81 of the axial groove 75 through the retaining ring 55.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: January 28, 2020
    Assignee: NSK-WARNER K.K.
    Inventors: Taichiro Ishikawa, Tomoyuki Kirino
  • MULTIPLATE WET CLUTCH
    Publication number: 20180266499
    Abstract: Provided is a multiplate wet clutch having capability of preventing damage of an axial groove portion formed in an inner cylindrical portion of a shaft. An inner cylindrical portion 3 of the shaft is formed with an axial groove 75 which is opened to a circumferential groove 53 and with which other members of the multiplate wet clutch for regulating movement of a retaining ring 55 toward axially on the other side are to be engaged. A pressure plate 35 is formed, on a surface 36b axially on the other side thereof, with a recessed portion 77 axially opposed to an opening portion 81 of the axial groove 75 through the retaining ring 55.
    Type: Application
    Filed: March 13, 2018
    Publication date: September 20, 2018
    Inventors: Taichiro ISHIKAWA, Tomoyuki KIRINO