Patents by Inventor David Lee Dunnuck

David Lee Dunnuck 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).

  • Systems and methods for mixing exhaust gases and reductant in an aftertreatment system
    Patent number: 10792626
    Abstract: A vane swirl mixer for exhaust aftertreatment includes: a vane swirl mixer inlet; a vane swirl mixer outlet; a first flow device including: a Venturi body; a plurality of upstream vanes positioned within the Venturi body; a plurality of upstream vane apertures interspaced between the plurality of upstream vanes; a plurality of downstream vanes positioned within the Venturi body; and a plurality of downstream vane apertures interspaced between the plurality of downstream vanes. At least one of the upstream vane hub and the downstream vane hub is radially offset from a Venturi center axis, thereby causing individual ones of the plurality of vanes coupled to the radially offset vane hub to differ in their geometry.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: October 6, 2020
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur, Niklas M. Schmidt, David Lee Dunnuck
  • Systems and methods for mixing exhaust gases and reductant in an aftertreatment system
    Patent number: 10632430
    Abstract: A vane swirl mixer for exhaust aftertreatment includes: a vane swirl mixer inlet; a vane swirl mixer outlet; a first flow device including: a Venturi body; a plurality of upstream vanes positioned within the Venturi body; a plurality of upstream vane apertures interspaced between the plurality of upstream vanes; a plurality of downstream vanes positioned within the Venturi body; and a plurality of downstream vane apertures interspaced between the plurality of downstream vanes. At least one of the upstream vane hub and the downstream vane hub is radially offset from a Venturi center axis, thereby causing individual ones of the plurality of vanes coupled to the radially offset vane hub to differ in their geometry.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: April 28, 2020
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur, Niklas M. Schmidt, David Lee Dunnuck