Aerial electrostatic system for weather modification

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  • Publication Date:
    September 14, 2021
  • Additional Information
    • Patent Number:
      11116,150
    • Appl. No:
      16/377276
    • Application Filed:
      April 08, 2019
    • Abstract:
      The system uses a specifically modified spray assembly to spray electrically charged fluid below selected clouds so that an updraft carries the charged fluid into the cloud and induces precipitation. The size, charge, and design of the sprayers are specifically designed to elicit precipitation.
    • Inventors:
      The United States of America, as represented by the Secretary of Agriculture (Washington, DC, US); Active Influence & Scientific Management, SP (San Angelo, TX, US)
    • Assignees:
      The United States of America, as represented by The Secretary of Agriculture (Washington, DC, US), Active Influence and Scientific Management, SP (Lubbock, TX, US)
    • Claim:
      1. A method of seeding clouds, the method comprising the steps of: (a) Equipping an aircraft with a spraying system comprising at least one sprayer, the sprayer comprising: (1) a spray nozzle that produces an atomized spray; (2) an electrode that surrounds the nozzle; (b) taking off in the aircraft and locating a cloud with an updraft of at least about 100 feet/min; (c) providing a pressurized fluid to the spray nozzle so that the fluid sprays from the nozzle; and, (d) electrically charging the electrode so that the fluid spraying from the nozzle has an electrical charge, the fluid spraying from the nozzle being drawn upwardly into the cloud.
    • Claim:
      2. The method of claim 1 further comprising: (e) when the updraft dissipates below 100 ft/min, turning off the pressurized fluid and searching for a pocket or a cloud where the updraft exceeds 100 ft/min.
    • Claim:
      3. The method of claim 2 further comprising: (f) when an area is located where the updraft exceeds 100 ft/min, repeating steps (c), (d), (e), and (f) until the fluid is exhausted.
    • Claim:
      4. The method of claim 1 wherein, in step (a), the spraying system comprises at least 2 vertically aligned sprayers.
    • Claim:
      5. The method of claim 1 wherein, in step (a) (1), the sprayer generates a volume medium diameter spray between 50 and 200 um.
    • Claim:
      6. The method of claim 1 wherein, in step (a) (1), the sprayer generates a volume medium diameter spray of about 120 um.
    • Claim:
      7. The method of claim 1 wherein, in step (a) (1), the nozzle spray angle is 60°-90° at 100 psi.
    • Claim:
      8. The method of claim 1 wherein, in step (a) (1), the nozzle spray angle is about 80° at 100 psi.
    • Claim:
      9. The method of claim 1 wherein, in step (a) (2), there is a gap between the trailing edge of the electrode and the spray nozzle orifice of about 0 to 10 mm.
    • Claim:
      10. The method of claim 1 wherein, in step (a) (2), there is a gap between the trailing edge of the electrode and the spray nozzle orifice of about 4.9 mm.
    • Claim:
      11. The method of claim 1 wherein, in step (b), the cloud is positioned between 1,000 and 15,000 feet above ground level.
    • Claim:
      12. The method of claim 1 wherein, in step (c), the fluid comprises water.
    • Claim:
      13. The method of claim 1 wherein, in step (c), the fluid comprises a chargeable fluid.
    • Claim:
      14. The method of claim 1 wherein, in step (c), the water is pressurized to about 50-100 psi.
    • Claim:
      15. The method of claim 1 wherein, in step (c), the fluid has a flow rate out of the sprayer of about 5 to 10 gallons per minute.
    • Claim:
      16. The method of claim 1 wherein, in step (d), the electrode imparts a positive charge to the water sprayed from the nozzle.
    • Claim:
      17. The method of claim 1 wherein, in step (d), the electrode is charged with a 2 mA current at +5,000 to 15,000 V.
    • Patent References Cited:
      1928963 October 1933 Chaffee
      4684063 August 1987 Goudy, Jr.
      5975425 November 1999 Carlton
      2005/0056705 March 2005 Bhumibol Adulyadej
      2020/0196539 June 2020 Cardi
    • Primary Examiner:
      Ganey, Steven J
    • Attorney, Agent or Firm:
      Fado, John D.
      Jones, Robert D.
    • Accession Number:
      edspgr.11116150