Patents by Inventor Toshiaki Mutou

Toshiaki Mutou 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).

  • Gas chamber forming method in closed cylinder of gas enclosed type
    Patent number: 4110888
    Abstract: A gas chamber forming method in a cylinder of gas enclosed type such as hydropneumatic shock absorber or gas spring having high pressure gas enclosed therein. The method comprises steps of inserting a free piston slidably in the cylinder, disposing a stopper having a passage communicating the opposite sides thereof so as to abut with the free piston at one side thereof remote from a closed end of the cylinder, pushing the stopper and the free piston toward the closed end of the cylinder thereby elevating pressure of the gas confined between the free piston and the closed end of the cylinder to a predetermined level, securing the stopper relative to the cylinder, and thereafter, closing an open end of the cylinder.
    Type: Grant
    Filed: July 13, 1977
    Date of Patent: September 5, 1978
    Assignee: Tokico Ltd.
    Inventor: Toshiaki Mutou