Patents by Inventor Kiyoyasu Hasegawa

Kiyoyasu Hasegawa 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).

  • Hydraulic power transmission device and work vehicle
    Patent number: 7637101
    Abstract: A hydraulic power transmission device in a work vehicle transmits motive power from two hydraulic motors disposed in parallel to each other. The hydraulic power transmission device includes: a case; a first motor shaft and a second motor shaft respectively disposed in a right-side area and in a left-side area inside the case, each linked to one of the two hydraulic motors; a counter shaft disposed in an area ranging between the first motor shaft and the second motor shaft in the case; an output shaft; a first transmission mechanism that transmits motive power from the first motor shaft to the output shaft via the counter shaft; a second transmission mechanism that transmits motive power from the second motor shaft to the output shaft; and a hydraulic clutch device disposed at the counter shaft, that transmits the motive power from the first motor shaft to the output shaft or cuts off transmission of the motive power.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: December 29, 2009
    Assignees: TCM Corporation, Hitachi Construction Machinery Co., Ltd.
    Inventors: Kenji Uezono, Seishi Morishita, Akira Takeshita, Kiyoyasu Hasegawa, Koji Hyodo, Koji Takano
  • Hydraulic Power Transmission Device and Work Vehicle
    Publication number: 20080271564
    Abstract: A hydraulic power transmission device in a work vehicle transmits motive power from two hydraulic motors disposed in parallel to each other. The hydraulic power transmission device includes: a case; a first motor shaft and a second motor shaft respectively disposed in a right-side area and in a left-side area inside the case, each linked to one of the two hydraulic motors; a counter shaft disposed in an area ranging between the first motor shaft and the second motor shaft in the case; an output shaft; a first transmission mechanism that transmits motive power from the first motor shaft to the output shaft via the counter shaft; a second transmission mechanism that transmits motive power from the second motor shaft to the output shaft; and a hydraulic clutch device disposed at the counter shaft, that transmits the motive power from the first motor shaft to the output shaft or cuts off transmission of the motive power.
    Type: Application
    Filed: March 9, 2006
    Publication date: November 6, 2008
    Applicants: TCM Corporation, Hitachi Construction Machinery Co., Ltd
    Inventors: Kenji Uezono, Seishi Morishita, Akira Takeshita, Kiyoyasu Hasegawa, Koji Hyodo, Koji Takano