Patents by Inventor Donald W. Groff

Donald W. Groff 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: 5682671
    Abstract: A method of assembling a bipolar battery, most preferably a lead-acid battery, includes assembling the electrochemical components necessary to provide the necessary voltage and capacity, maintaining the electrochemical components under the desired compression and then sealing such electrochemical components as a unit utilizing various assembly components. The resulting bipolar battery in the preferred embodiment includes an electrolyte fill/vent box that seals the top of the electrochemical component unit and a vacuum box that seals the bottom surface.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: November 4, 1997
    Assignee: GNB Battery Technologies, Inc.
    Inventors: David L. Lund, William H. Kump, Donald W. Groff
  • Patent number: 5470679
    Abstract: A method of assembling a bipolar lead-acid battery includes assembling the electrochemical components necessary to provide the necessary voltage and capacity, maintaining the electrochemical components under the desired compression and then sealing such electrochemical components as a unit utilizing various assembly components. The resulting bipolar battery in the preferred embodiment includes an electrolyte fill/vent box that seals the top of the electrochemical component unit and a vacuum box that seals the bottom surface.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: November 28, 1995
    Assignee: GNB Battery Technologies Inc.
    Inventors: David L. Lund, William H. Kump, Donald W. Groff
  • Patent number: 5429643
    Abstract: A method of assembling a bipolar lead-acid battery includes assembling the electrochemical components necessary to provide the necessary voltage and capacity, maintaining the electrochemical components under the desired compression and then sealing such electrochemical components as a unit utilizing various assembly components. The resulting bipolar battery in the preferred embodiment includes an electrolyte fill/vent box that seals the top of the electrochemical component unit and a vacuum box that seals the bottom surface.
    Type: Grant
    Filed: June 2, 1993
    Date of Patent: July 4, 1995
    Assignee: GNB Battery Technologies Inc.
    Inventors: David L. Lund, William H. Kump, Donald W. Groff
  • Patent number: 5385587
    Abstract: An apparatus for pasting a battery collector assembly having a current collector and enlarged members having a top surface and a bottom surface and a thickness greater than the current collector is provided. The current collector has at least one predetermined area into which paste is to be filled. The apparatus comprises a paste-dispensing nozzle having an orifice located in a dispensing end of the nozzle. The nozzle is mounted to dispense paste in at least one paste area of the collector assembly. The nozzle dispensing end is adapted to size a first level of paste dispensed in the paste area on one side of the current collector, and a surface is provided opposite the dispensing end of the nozzle which is adapted to size a second level of paste dispensed in the paste area on the other side of the current collector.
    Type: Grant
    Filed: August 11, 1993
    Date of Patent: January 31, 1995
    Assignee: GNB Battery Technologies Inc.
    Inventors: David L. Lund, Donald W. Groff, James J. Bonk, Kenneth S. Rumsey