Patents by Inventor Robert A. Anstey

Robert A. Anstey 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: 4634057
    Abstract: An electrostatic pump or pumping liquids having a resistivity in the range of 10.sup.10 to 10.sup.7 ohm cm has a pump housing. The pump housing includes a passageway through which the liquid is pumped, and a single injection electrode disposed upstream of the passageway. The electrode has a sharp electrically-conducting tip. A constriction in the region of the tip is shaped to conform to the surface configuration of the tip so that the liquid flows pass the tip in a laminar nonturbulent fashion through an orifice of reduced cross-section. The constriction is so dimensioned as to provide a high resistance path. A chamber is disposed downstream of the constriction and is of larger cross-section than the constriction. A discharged electrode is disposed in the chamber and is separated from the injection electrode by the chamber and the constriction. The injection and discharge electrodes are coupled to a high voltage generator to maintain an electric potential between the electrodes on the order of kilovolts.
    Type: Grant
    Filed: September 3, 1985
    Date of Patent: January 6, 1987
    Assignee: Imperial Chemical Industries PLC
    Inventors: Ronald A. Coffee, Timothy J. Noakes, Robert A. Anstey