Patents by Inventor Toshifumi Yasuda

Toshifumi Yasuda 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).

  • Load controller for hydrostatic transmission in work vehicles
    Publication number: 20060254268
    Abstract: The present invention provides a load controller for use in a hydrostatic transmission for a work vehicle that is free from control failure caused by deterioration of the constituent components, and that can be miniaturized and simplified in structure compared to conventional load controllers. In the work vehicle, power supplied from an engine (E) is branched to drive an implement system and a traveling system. A hydrostatic transmission (1) is provided in the traveling system. The hydrostatic transmission (1) connects, in an oil-hydraulic closed circuit, an oil-hydraulic pump (2) driven by the engine (E) and an oil-hydraulic motor (4) driven by the oil-hydraulic pump (2).
    Type: Application
    Filed: April 14, 2004
    Publication date: November 16, 2006
    Inventors: Toshifumi Yasuda, Shinegori Sakikawa, Kazuhiko Ohtsuki
  • Pump system and axle-driving system
    Publication number: 20060042843
    Abstract: There is provided a pump system including a housing capable of reserving oil in an internal space; an input shaft supported by the housing so as to be operatively connected to a driving source; a pump shaft supported by the housing; a hydraulic pump body which is accommodated in the housing and is driven by the pump shaft; a PTO shaft supported by the housing; a power transmission gear train which transmits a power from the input shaft to the pump shaft and the PTO shaft, and is accommodated in the housing; and a PTO clutch mechanism accommodated in the housing so as to be positioned in a power transmission path from the input shaft to the PTO shaft. The power transmission gear train has at least two first and second transmission gears meshed with each other.
    Type: Application
    Filed: July 28, 2005
    Publication date: March 2, 2006
    Inventors: Toshifumi Yasuda, Shigenori Sakikawa, Hiroshi Kitagawara
  • Power-dividing device and axle-driving device for a working vehicle
    Publication number: 20040237490
    Abstract: A power-dividing device for a working vehicle includes a case member, an input shaft supported by the case member so that a first end portion of the input shaft can be operatively connected to a driving source, a PTO unit having a PTO shaft supported by the case member so as to be offset with respect to the input shaft, a power transmission mechanism accommodated in the case member to transmit power from the input shaft to the PTO shaft, and a first pump unit having a first pump shaft operatively connected to the input shaft and being fluid-connected to an actuator disposed outside.
    Type: Application
    Filed: April 12, 2004
    Publication date: December 2, 2004
    Inventors: Toshifumi Yasuda, Shigenori Sakikawa, Hiroshi Kitagawara, Koji Kiyooka