Patents by Inventor Dale W. Pressnall

Dale W. Pressnall 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: 4901652
    Abstract: Improved methods and apparatus for accumulating and conveying hot ash produced by an incinerator are provided. The method is comprised of the steps of continuously conducting hot ash from the incinerator to a closed oscillating housing which includes first and second compartments. The compartments are connected by an internal door for sealingly isolating the first compartment from the second compartment, and the second compartment has an ash discharge door connected thereto for sealingly isolating both the first and second compartments when the internal door therebetween is open. The oscillating housing is continuously operated in cycles whereby the ash conducted to the first compartment is accumulated therein and conveyed over the floor thereof to the second compartment, and the ash received in the second compartment is conveyed over the floor thereof and discharged therefrom without air infiltration from the housing to the incinerator taking place.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: February 20, 1990
    Assignee: John Zink Company
    Inventors: Dale W. Pressnall, John R. Petersen, Jr., Michael R. Keller
  • Patent number: 4900244
    Abstract: A method and apparatus for flaring a gas stream such as the gas mixtures formed in landfills while retarding the backward propagation of flame thereto are provided. The method comprises conducting the gas stream to a burner structure having a plurality of flow passages therein configured such that the gas stream can flow through the passages, but the backward propagation of flame therethrough is retarded; flowing the gas stream through the flow passages of the burner whereby the gas stream is jetted therefrom and initially mixed with air; igniting the gas stream; and mixing the ignited gas stream with additional air by confining the jetted and ignited gas mixture within a stack configured to allow the admission of air around the burner structure and to discharge products of combustion into the atmosphere.
    Type: Grant
    Filed: August 29, 1984
    Date of Patent: February 13, 1990
    Assignee: John Zink Company
    Inventors: Michael R. Keller, Roger K. Noble, Dale W. Pressnall
  • Patent number: 4798150
    Abstract: Apparatus for handling ash. A tank is filled with water and has the lower end thereof located at a substantial angle from horizontal. The tank is positioned beneath an incinerator to receive ash therefrom. An ash wheel having sectors defined by upright paddle elements has a portion thereof received beneath the water into which the ash falls and a portion thereof which extends over one edge of the tank. As the wheel rotates, ash is swept over the edge of the tank and onto a conveyor for disposal.
    Type: Grant
    Filed: November 25, 1987
    Date of Patent: January 17, 1989
    Assignee: John Zink Company
    Inventors: Dale W. Pressnall, Michael R. Keller, Robert E. Schwartz