Patents by Inventor Toshiyuki Yotsumoto

Toshiyuki Yotsumoto 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).

  • Wheel tread adjusting apparatus
    Patent number: 4621872
    Abstract: There is disposed a wheel tread adjusting apparatus for a vehicle having a main axle case supported by a vehicle body and slidable cases mounted in right and left ends of the main axle case, respectively, the slidable cases being slidable transversely of the vehicle toward and away from each other. A fixing plate extends between the main axle case and each of the slidable cases, and is secured to one of the two cases. The fixing plate is positionally adjustably lockable to the other of the two cases.
    Type: Grant
    Filed: April 23, 1985
    Date of Patent: November 11, 1986
    Assignee: Kubota, Ltd.
    Inventors: Toshiyuki Yotsumoto, Tomeo Umemoto
  • Change-speed apparatus in a tractor
    Patent number: 4528872
    Abstract: A change-speed apparatus in a tractor equipped with an engine has a planetary gearing mechanism settable between its two positions. Actuation of the mechanism to one of the two positions is hydraulically power-actuated, while actuation to the other of the two positions is automatically effected, as the hydraulic power is released, by a resiliently urging spring. Power-transmitting operative connection is therefore always maintained between the engine and running-drive wheels even when the hydraulic actuation power comes to extinct.
    Type: Grant
    Filed: April 30, 1982
    Date of Patent: July 16, 1985
    Assignee: Kubota, Ltd.
    Inventors: Tomeo Umemoto, Toshiyuki Yotsumoto
  • Operating lever assembly for farm tractors
    Patent number: 4279324
    Abstract: An operating lever assembly for a farm tractor comprising a first block attached to a side wall of a transmission case, a second block disposed close to a driver's seat, turning shafts mounted on the first block and operatively connected to operating rods projecting from the side wall of the transmission case, operating levers mounted on the second block, and coupling means operatively connecting the turning shafts to the operating levers.
    Type: Grant
    Filed: September 11, 1979
    Date of Patent: July 21, 1981
    Assignee: Robert Bosch GmbH
    Inventors: Toshiyuki Yotsumoto, Tuginobu Ujita, Eisaku Shinohara