Patents by Inventor David T. Moldt

David T. Moldt 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).

  • Method for timing a polymer pump containing polymer
    Patent number: 8177535
    Abstract: A method for restoring the registry of opposed shafts that carry meshing pump teeth inside a polymer pump that contains polymer without removing polymer from within the pump, the method using an asymmetric pattern of apertures in the shaft ends and a template having a pattern of holes that matches the pattern of apertures, and dowels that closely fit the holes and apertures.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: May 15, 2012
    Assignee: Equistar Chemicals, LP
    Inventors: David T. Moldt, James H. Everitt
  • Method for timing a polymer pump containing polymer
    Publication number: 20100124512
    Abstract: A method for restoring the registry of opposed shafts that carry meshing pump teeth inside a polymer pump that contains polymer without removing polymer from within the pump, the method using an asymmetric pattern of apertures in the shaft ends and a template having a pattern of holes that matches the pattern of apertures, and dowels that closely fit the holes and apertures.
    Type: Application
    Filed: November 19, 2008
    Publication date: May 20, 2010
    Inventors: David T. Moldt, James H. Everitt
  • Rotary seal
    Patent number: 7392988
    Abstract: A rotary seal housing having opposing ends, a first fluid conducting slot at one of the opposing ends, a pair of spaced apart fluid conducting slots at the other opposing end, and sets of apertures connecting the first fluid conducting slot with the pair of fluid conducting slots, the housing having helical push back grooves that are arcuate in cross-section.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: July 1, 2008
    Assignee: Equistar Chemicals, LP
    Inventors: David T. Moldt, James E. Taylor, Sina Saylany
  • Rotary seal
    Publication number: 20080018055
    Abstract: A rotary seal housing having opposing ends, a first fluid conducting slot at one of the opposing ends, a pair of spaced apart fluid conducting slots at the other opposing end, and sets of apertures connecting the first fluid conducting slot with the pair of fluid conducting slots, the housing having helical push back grooves that are arcuate in cross-section.
    Type: Application
    Filed: June 29, 2006
    Publication date: January 24, 2008
    Inventors: David T. Moldt, James E. Taylor, Sina Saylany