Patents by Inventor Jyoji Tokumi

Jyoji Tokumi 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).

  • Double-acting piston engine
    Patent number: 5347960
    Abstract: A double-acting piston engine has a crankshaft rotatable about a first central axis and having a crankpin having a second central axis which is spaced a distance from the first central axis, a cylinder assembly having a pair of cylinder chambers confronting each other along an axial line perpendicular to the first central axis, with the crankpin being disposed substantially between the cylinder chambers, and a piston assembly slidably disposed in the cylinder chambers and coupled to the crankpin.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: September 20, 1994
    Inventor: Jyoji Tokumi