Patents by Inventor Robert Edgar Hummell, III

Robert Edgar Hummell, III 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).

  • Apparatus and method for filtering voltage for an electrostatic precipitator
    Patent number: 6839251
    Abstract: An apparatus and method for controlling voltage applied to an electrostatic precipitator is disclosed. This apparatus includes a pulsating, direct current, voltage mechanism that is operable to receive power from a single phase, alternating current voltage source, and a spiral wound filter capacitor, wherein the pulsating, direct current, voltage mechanism is electrically connected in parallel to the spiral wound filter capacitor and the spiral wound filter capacitor is electrically connected in parallel to the electrostatic precipitator. Optionally, a resistor is present to lower the transient voltage rating of the spiral wound filter capacitor. A switching mechanism may be utilized to apply differing amounts of capacitance and inductance in order to apply a range of voltage waveforms to the electrostatic precipitator to potentially maximize particulate collection efficiency for the electrostatic precipitator.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: January 4, 2005
    Assignee: BHA Group Holdings, Inc.
    Inventors: David F. Johnston, Michael M. Mahler, Terry L. Farmer, Robert Edgar Hummell, III
  • Apparatus and method for filtering voltage for an electrostatic precipitator
    Patent number: 6611440
    Abstract: An apparatus and method for controlling voltage applied to an electrostatic precipitator is disclosed. This apparatus includes a pulsating, direct current, voltage mechanism that is operable to receive power from a single phase, alternating current voltage source, and a spiral wound filter capacitor, wherein the pulsating, direct current, voltage mechanism is electrically connected in parallel to the spiral wound filter capacitor and the spiral wound filter capacitor is electrically connected in parallel to the electrostatic precipitator. Optionally, a resistor is present to lower the transient voltage rating of the spiral wound filter capacitor. A switching mechanism may be utilized to apply differing amounts of capacitance and inductance in order to apply a range of voltage waveforms to the electrostatic precipitator to potentially maximize particulate collection efficiency for the electrostatic precipitator.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: August 26, 2003
    Assignee: BHA Group Holdings, Inc.
    Inventors: David F. Johnston, Michael M. Mahler, Terry L. Farmer, Robert Edgar Hummell, III