Patents by Inventor Clive Marcus Tunna

Clive Marcus Tunna 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).

  • Dry Pumps
    Publication number: 20070196228
    Abstract: A screw pump comprises a pair of rotors (92, 94) each carrying an external screw thread (96, 98), the pair of rotors being rotatably mounted in a stator (72) and arranged such that, in operation, the screw threads of the rotors intermesh as the rotors rotate in opposing directions. Means (100, 102) are provided for actively controlling the axial position of the rotors within the stator during use of the pump.
    Type: Application
    Filed: November 4, 2004
    Publication date: August 23, 2007
    Inventors: Clive Marcus Tunna, Allan McDiarmid, Mark Tomkins
  • Rotary piston vacuum pump with washing installation
    Publication number: 20060120909
    Abstract: A pump comprises at least one rotor (1), a stator (5) and a housing (5), the rotor (1) being enclosed by the housing (5). The housing (5) comprises at least one port (2) extending through the housing (5) to enable delivery of a fluid directly onto a surface of the at least one rotor (1).
    Type: Application
    Filed: October 6, 2003
    Publication date: June 8, 2006
    Inventors: Mark Hope, Clive Marcus Tunna, Frederick Underwood