Patents by Inventor Tom Timmerman

Tom Timmerman 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).

  • Patent number: 4694785
    Abstract: A piston apparatus has a first pair of spaced-apart cylinders aligned along a cylinder axis. There is a pair of pistons, each piston being slidably received in one of the cylinders for reciprocation along the axis. A pair of spaced-apart crank members are on opposite sides of the cylinder axis. The crank members have parallel axes of rotation. Gears mechanically couple the crank members together for rotation at the same rotational speed and in the same direction. A crank connecting member has a longitudinal axis and opposite ends. Each end is connected to one of the crank members a distance from the axis of rotation thereof.
    Type: Grant
    Filed: January 23, 1986
    Date of Patent: September 22, 1987
    Inventors: Tom Timmerman, Norman V. Chapman