Patents by Inventor Thomas W. Armstrong

Thomas W. Armstrong 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).

  • Venturi effect material return system of a material collection system and appertaining method
    Patent number: 6942717
    Abstract: A material return system of a material collection system and appertaining method permits fine material collected in a fine material collector to be returned to a main debris tank by taking advantage of the venturi effect, thus permitting a relatively trouble-free operation of the material collection system.
    Type: Grant
    Filed: May 7, 2003
    Date of Patent: September 13, 2005
    Assignee: Vac-Con, Inc.
    Inventors: Thomas W. Armstrong, Scott Johnson
  • Venturi effect material return system of a material collection system and appertaining method
    Publication number: 20040221717
    Abstract: A material return system of a material collection system and appertaining method permits fine material collected in a fine material collector to be returned to a main debris tank by taking advantage of the venturi effect, thus permitting a relatively trouble-free operation of the material collection system.
    Type: Application
    Filed: May 7, 2003
    Publication date: November 11, 2004
    Applicant: VAC-CON Inc.
    Inventors: Thomas W. Armstrong, Scott Johnson
  • Vacuum truck dump container apparatus
    Patent number: 6752467
    Abstract: A truck debris collection container mounting apparatus comprising a truck frame, a support frame moveably mounted to the truck frame, a debris collection container pivotally mounted to the support frame, a lifting device to vertically and horizontally move the support frame relative to the truck frame, and a device to rearwardly tilt the debris collection container. The support frame is movably attached to the truck frame via a plurality of extendable lifts and support links, which allows the debris collection container to be lifted up and rearward from the truck frame.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: June 22, 2004
    Assignee: Vac-Con, Inc.
    Inventors: Peter Oliver Palrose, Thomas W. Armstrong