Patents by Inventor Shunzo Yamada

Shunzo Yamada 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).

  • Tractor transmission to permit smooth change of speed operation effectuated by rotational resistance
    Patent number: 4741227
    Abstract: A transmission system for a tractor comprising a double clutch for transmitting engine output to an inner shaft consitituting part of a propelling line and to a tubular outer shaft constituting part of a power takeoff line. The double clutch includes a first and second flywheels, and the second flywheel defines a boss for relatively rotatable supporting a forward end of the outer shaft therein. The transmission system further comprises a propelling line change speed mechanism including a reversing gear and a reversing shaft for supporting the reversing gear. A rotational resistance applying device is provided on the reversing shaft for applying a rotational resistance to the propelling line by frictional engagement with the reversing gear.
    Type: Grant
    Filed: December 2, 1986
    Date of Patent: May 3, 1988
    Assignee: 501 Kubota, Ltd.
    Inventors: Shunzo Yamada, Satoshi Fujita, Kiyokazu Nakanishi
  • Case for axle having universal joint
    Patent number: 4026124
    Abstract: Axle case comprising a tube, a substantially semispherical first member integral with the tube and a substantially semispherical second member connected to the first member and rotatable relative thereto.
    Type: Grant
    Filed: April 8, 1975
    Date of Patent: May 31, 1977
    Assignee: Kuboto Tekko Kabushiki Kaisha
    Inventors: Kazuo Toyokuni, Shunzo Yamada, Teizo Takahashi, Hajime Nakamura, Kazunari Nobutomo, Shinji Kawakami