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Electrostatic-induction spray-charging nozzle system

  • US 5,765,761 A
  • Filed: 07/26/1995
  • Issued: 06/16/1998
  • Est. Priority Date: 07/26/1995
  • Status: Expired due to Term
First Claim
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1. An electrostatic induction spray-charging nozzle device, the device being adapted for use with an electrical power supply, a liquid source and a gas source upstream of a rearward end of the device, comprising:

  • an electrically insulative body portion having a first channel therethrough for carrying a liquid from the liquid source, and a second channel therethrough for carrying gas from the gas source;

    a liquid orifice tip in the body portion, the liquid orifice tip having an aperture aligned to receive and discharge liquid from the first channel of the body portion, the liquid being discharged from the liquid tip so as to meet with the gas in a droplet formation zone and form an atomized spray cloud;

    a cap removably coupled to a forward end of the body portion, the cap comprising a spray exit aperture substantially coaxial to the liquid orifice tip aperture, an electrode forming a portion of the aperture, and an electrical connector within the cap for connecting the electrode to the power supply;

    the body portion containing (1) no seam through which fluid may communicate with the first channel and (2) no electrical path between the first channel and the exterior of the body portion through which electrical charge may leak from the electrode to the liquid in the first channel; and

    at least one resilient seal located between the body portion and the cap and not in communication with the first channel in order to block any fluid communication between the liquid orifice tip of the body and the electrical connector in the cap.

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