Patents by Inventor Jonathan Austin Ma

Jonathan Austin Ma 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).

  • Selectable 2-stroke/4-stroke camshaft drive system
    Patent number: 6499452
    Abstract: A camshaft drive system is described for a selectable two-stroke/four-stroke internal combustion engine with exhaust and intake poppet valves opened and closed by at least one camshaft. In a preferred embodiment of the system, the camshaft is connected permanently to a planetary gear set which is driven continuously by the engine crankshaft, and means are provided for setting the planetary gear set in one of two selectable stable modes to function either as a gear box or as a rigid coupling.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: December 31, 2002
    Inventor: Jonathan Austin Ma
  • Selectable 2-stroke/4-stroke camshaft drive system
    Publication number: 20020117133
    Abstract: A camshaft drive system is described for a selectable two-stroke/four-stroke internal combustion engine with exhaust and intake poppet valves opened and closed by at least one camshaft. In a preferred embodiment of the system, the camshaft is connected permanently to a planetary gear set which is driven continuously by the engine crankshaft, and means are provided for setting the planetary gear set in one of two selectable stable modes to function either as a gear box or as a rigid coupling.
    Type: Application
    Filed: March 6, 2002
    Publication date: August 29, 2002
    Inventor: Jonathan Austin MA