Patents by Inventor Juji Kajitani

Juji Kajitani 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).

  • Damper disc having annular protrusions and recesses
    Patent number: 4674991
    Abstract: The present invention discloses a damper disc comprising a spline hub; a radial flange formed at the hub; a case connected to facings; circumferentially spaced plural compressible coil springs connecting the case and the flange together; sealed spring chambers formed around the springs by the case or a cover; sealed narrow spaces connecting the spring chambers together; and spring seats disposed at both ends of the springs; said chambers and spaces being filled with oil, so that the oil applies a resistance force to the moving spring seats. At least one of side surfaces of a portion of the flange radially inside the springs may be provided with radially spaced annular protrusions, and the cases may be provided with annular protrusions engaging with the protrusions on the flange with narrow spaces therebetween.
    Type: Grant
    Filed: April 15, 1986
    Date of Patent: June 23, 1987
    Assignee: Kabushiki Kaisha Daikin Seisakusho
    Inventors: Hiromi Tojima, Juji Kajitani