Patents by Inventor Mark Allen Scheffer

Mark Allen Scheffer 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).

  • Failsafe fuel doser solenoid valve using a reversible electrical coil assembly
    Publication number: 20090114864
    Abstract: A method is provided to reduce the risk that an exhaust line reductant dosing system comprising a pulse width modulated solenoid valve will leak reductant into the exhaust. The method comprises powering the solenoid's electrical coil with a current reversed from the primary direction. The resulting magnetic field exerts a force on the valve pintel in the same direction as that exerted by the solenoid's spring. The additional force of the magnetic field can correct situations in which the valve pintel does not properly engage the valve seat.
    Type: Application
    Filed: November 5, 2007
    Publication date: May 7, 2009
    Applicant: Eaton Corporation
    Inventor: Mark Allen Scheffer