Patents Assigned to Dunlop Australia Limited
  • Patent number: 4307758
    Abstract: A method and apparatus for applying paste to battery grids wherein the paste is circulated in a primary circuit incorporating an open reservoir wherein the paste is relieved of all pumping pressure and portion of the paste is diverted from the primary circuit into a secondary circuit for delivery to a nozzle which may be selectively opened and closed to deliver paste to the grid, the secondary circuit also incorporates the open reservoir.
    Type: Grant
    Filed: November 6, 1979
    Date of Patent: December 29, 1981
    Assignee: Dunlop Australia Limited
    Inventors: William L. McDowall, Alan K. Maplesden, Trevor W. North, Erich Kaufmann
  • Patent number: 4239839
    Abstract: A multi-cell battery constructed of a plurality of frames of insulating material each frame having a number of active battery material areas arranged side by side with a division portion between each material area, the frames being arranged side by side in a direction normal to the plane of the frame with the division portions secured in sealed relation to form partitions between adjacent cells of the battery. The active battery material in respective areas being selected so that adjacent areas in each frame are of opposite polarity and adjacent areas in adjoining frames are of opposite polarity. A barrier frame interposed between and secured to two frames in the assembly forming a chemical and electrical barrier between the active battery material in frames on opposite sides of the barrier member so that the assembly of frames forms two batteries of equal nominal voltage.
    Type: Grant
    Filed: May 30, 1979
    Date of Patent: December 16, 1980
    Assignee: Dunlop Australia Limited
    Inventors: William L. McDowall, Alan K. Maplesden
  • Patent number: 4022951
    Abstract: A multi-cell battery comprises a plurality of frames each divided into a number of side by side active paste support areas. The frames are assembled and secured together in a stacked formation so that the perimeter portions of the frames form the top, bottom and two opposite sides of the battery, and the divisions in the frames form cell partitions.Each frame is pasted with active material to form plates with adjacent plates in each frame being of opposite polarity and adjacent plates in each frame being of opposite polarity and adjacent plates in adjoining frames also being of opposite polarity. Electrolyte-porous separator material is provided between adjacent plates in adjoining frames.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: May 10, 1977
    Assignee: Dunlop Australia Limited
    Inventor: William Leslie McDowall
  • Patent number: 4019941
    Abstract: A method of producing steel reinforced conveyor belting wherein the steel reinforcing cords are located in grooves formed between the mating faces of two layers of P.V.C. based material. The faces of the grooves are coated with an adhesive having a P.V.C. base including an epoxy resin and curing agent and the steel cords are adhered to the layers of P.V.C. by curing the assembly of cords and cover layers under heat and pressure.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: April 26, 1977
    Assignee: Dunlop Australia Limited
    Inventors: Eric Victor Donald Prince, Kenneth Llewellyn Lewis, Leonard John Michael Ralph
  • Patent number: 3941615
    Abstract: A multi-cell battery comprising a plurality of frames each divided into a number of side-by-side active paste support areas. The frames are assembled and secured together in a stacked formation so that the perimeter portions of the frames form the top, bottom and two opposite sides of the battery, and the divisions in the frames form cell partitions. Each frame is pasted with active material to form plates with adjacent plates in each frame being of opposite polarity and adjacent plates in adjoining frames also being of opposite polarity.
    Type: Grant
    Filed: September 20, 1973
    Date of Patent: March 2, 1976
    Assignee: Dunlop Australia Limited
    Inventor: William Leslie McDowall