Patents by Inventor Akihisa Okano

Akihisa Okano 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 change speed system for a working vehicle
    Patent number: 6692409
    Abstract: A hydraulic change speed system for a working vehicle includes a gear type change speed device shiftable by an actuator, a hydraulic clutch connected to a power transmission line including the gear type change speed device, a valve unit for switching operative states of the hydraulic clutch, a controller for controlling the valve unit, and a timer for measuring a shifting time of the gear type change speed device. The valve unit is interlocked to the actuator to be controllable to pressurize the hydraulic clutch rapidly for a predetermined time from a start of engagement of the hydraulic clutch and to pressurize the hydraulic clutch gradually the predetermined time. The controller sets the predetermined time based on the shifting time measured.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: February 17, 2004
    Assignee: Kubota Corporation
    Inventors: Toshiya Fukumoto, Akihisa Okano, Satoshi Machida, Akio Hattori
  • Hydraulic change speed system for a working vehicle
    Publication number: 20020119865
    Abstract: A hydraulic change speed system for a working vehicle includes a gear type change speed device shiftable by an actuator, a hydraulic clutch connected to a power transmission line including the gear type change speed device, a valve unit for switching operative states of the hydraulic clutch, a controller for controlling the valve unit, and a timer for measuring a shifting time of the gear type change speed device. The controller starts disengaging the hydraulic clutch by depressurizing the hydraulic clutch upon start of operation of the actuator, and starts engaging the hydraulic clutch by pressurizing the hydraulic clutch upon finish of operation of the actuator. The valve unit is interlocked to the actuator to be controllable to pressurize the hydraulic clutch rapidly for a predetermined time from a start of engagement of the hydraulic clutch and to pressurize the hydraulic clutch gradually the predetermined time. The controller sets the predetermined time based on the shifting time measured.
    Type: Application
    Filed: February 28, 2001
    Publication date: August 29, 2002
    Applicant: KUBOTA CORPORATION
    Inventors: Toshiya Fukumoto, Akihisa Okano, Satoshi Machida, Akio Hattori