Patents by Inventor Tomiya Oyanagi

Tomiya Oyanagi 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).

  • Shaping apparatus for a synchronizer ring
    Patent number: 5076882
    Abstract: A synchronizer ring has a frictional material and oil grooves extending on the frictional surface of the frictional material in a longitudinal direction and a circumferential direction, and in the oil grooves, the fiber layer of the frictional material is substantially continuous. The oil grooves are formed simultaneously by a shaping apparatus including an arrangement of longitudinal and circumferential groove punches which are simultaneously forced outwardly from a punch holder by a cooperative slide member which reciprocates within the punch holder.
    Type: Grant
    Filed: February 26, 1990
    Date of Patent: December 31, 1991
    Assignee: NSK Warner K.K.
    Inventors: Tomiya Oyanagi, Yutaka Ota