Patents by Inventor Kozo Kitayama

Kozo Kitayama 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).

  • Compact crawler type tractor
    Patent number: 7836982
    Abstract: A compact crawler type tractor having an excellent turning feeling is provided. A hydraulic speed change mechanism for turning includes a hydrostatic transmission pump for turning and a hydrostatic transmission motor for turning, and is characterized in that the hydrostatic transmission pump for turning is a variable displacement pump, and an output of the hydrostatic transmission motor for turning is input into a differential mechanism. By combining the hydrostatic transmission pump for turning and the hydrostatic transmission motor for turning and the differential mechanism, an excellent turning feeling can be obtained.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: November 23, 2010
    Assignee: Yanmar Co., Ltd.
    Inventors: Masafumi Tsujita, Kozo Kitayama, Kazuhisa Yokoyama, Yumiko Yamashita
  • Compact Crawler Type Tractor
    Publication number: 20090127007
    Abstract: A compact crawler type tractor having an excellent turning feeling is provided. A hydraulic speed change mechanism for turning includes a hydrostatic transmission pump for turning and a hydrostatic transmission motor for turning, and is characterized in that the hydrostatic transmission pump for turning is a variable displacement pump, and an output of the hydrostatic transmission motor for turning is input into a differential mechanism. By combining the hydrostatic transmission pump for turning and the hydrostatic transmission motor for turning and the differential mechanism, an excellent turning feeling can be obtained.
    Type: Application
    Filed: January 19, 2006
    Publication date: May 21, 2009
    Inventors: Masafumi Tsujita, Kozo Kitayama, Kazuhisa Yokoyama, Yumiko Yamashita
  • Tractor
    Patent number: D556789
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: December 4, 2007
    Assignee: Yanmar Co., Ltd.
    Inventors: Kozo Kitayama, Mitsuyuki Hatanaka, Zenzo Uchida, Masakazu Komatsu