Patents by Inventor Jyun Tokumasu

Jyun Tokumasu 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: 6293382
    Abstract: A friction plate for a wet clutch includes a core plate, and friction members bonded to opposite sides of the plate core. The friction member is provided with a plurality of first oil grooves each permitting the communication between inner and outer circumferential edges of the friction member, and a plurality of second oil grooves each permitting the communication between intermediate portions of the adjacent first oil grooves. The first oil grooves are disposed in such a manner that they are inclined at a given angle in a circumferential direction of the core plate with respect to a line of radius passing through a radially inner end of each first oil groove. The second oil grooves are disposed in such a manner that they are inclined in the same direction as the first oil grooves at an acute angle larger than the given angle with respect to a line of radius passing through a radially inner end of each second oil groove. Thus, the cooling property is enhanced, and the dragging torque is decreased.
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: September 25, 2001
    Assignee: Kabushiki Kaisha F.C.C.
    Inventors: Yukio Nishide, Mitsuo Miyatsu, Chiwaji Suzuki, Jyun Tokumasu