Patents by Inventor Hitoshi Muto

Hitoshi Muto 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).

  • Servo operation apparatus for a transmission
    Patent number: 5947000
    Abstract: A servo operation apparatus for a transmission comprising an input shaft to which the shift-change operation force is mechanically transmitted from a shift lever, a servo unit for boosting the shift-change operation force by feeding a working fluid, and a valve device which feeds the working fluid to, or drains the working fluid from, the servo unit depending upon the shift-change operation of the shift lever, wherein provision is made of an working fluid feed control means which feeds the working fluid in such a manner that the pressure of the working fluid in the servo unit is raised with a steep gradient in the former half until a predetermined initially raised pressure value is reached and, thereafter, is raised in the latter half with a gradient less steep than that of said former half.
    Type: Grant
    Filed: December 7, 1998
    Date of Patent: September 7, 1999
    Assignees: Nissan Diesel Motor Co., Ltd., Sanwa Seiki Ltd.
    Inventors: Keiichi Kazumori, Hitoshi Muto, Kazunari Imasato
  • Servo operation apparatus for a transmission
    Patent number: 5857400
    Abstract: A servo operation apparatus for a transmission comprising an input shaft to which the shift-change operation force is mechanically transmitted from a shift lever, a servo unit for boosting the shift-change operation force by feeding a working fluid, and a valve device which feeds the working fluid to, or drains the working fluid from, the servo unit depending upon the shift-change operation of the shift lever, wherein provision is made of an working fluid feed control means which feeds the working fluid in such a manner that the pressure of the working fluid in the servo unit is raised with a steep gradient in the former half until a predetermined initially raised pressure value is reached and, thereafter, is raised in the latter half with a gradient less steep than that of said former half.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: January 12, 1999
    Assignees: Nissan Diesel Motor Co., Ltd., Sanwa Seiki Ltd.
    Inventors: Keiichi Kazumori, Hitoshi Muto, Kazunari Imasato