Patents by Inventor Kimimasa Onda

Kimimasa Onda 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).

  • Operating speed change-over device
    Patent number: 5085052
    Abstract: An operating speed change-over device is equipped with an automatic speed change-over valve which opens and closes a pilot fluid line that connects a pilot port of a capacity change-over valve of a capacity-variable hydraulic motor to a pilot pump. The automatic speed change-over valve has one pilot port that is connected to a pressurized fluid feed line leading to the hydraulic motor and has another pilot port connected to the return fluid line of the hydraulic motor. The automatic speed change-over valve is changed over by an effective differential pressure between the two fluid lines.
    Type: Grant
    Filed: February 26, 1991
    Date of Patent: February 4, 1992
    Assignee: Shin Caterpillar Mitsubishi Ltd.
    Inventors: Masanobu Kawanaka, Youichi Kondo, Junichi Tabata, Kimimasa Onda