Spray nozzle

  • US 7,611,079 B2
  • Filed: 10/12/2006
  • Issued: 11/03/2009
  • Est. Priority Date: 02/13/2002
  • Status: Active Grant
First Claim
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1. A spray nozzle comprising:

  • a) a nozzle body having opposed upstream and downstream end portions, the upstream end portion including a fluid receiving section, the downstream end portion including a fluid discharge section and defining a spray opening for emitting an atomized spray therefrom, the nozzle body defining a central bore which extends between the fluid receiving section and the fluid discharge section and delineates a central axis and delimits an interior locating surface for the nozzle;

    b) a swirl element disposed within the central bore of the nozzle body and positioned adjacent to the fluid receiving section of the nozzle body, the swirl element having a peripheral surface and defining an interior swirl cavity, the peripheral surface having an upstream and a downstream portion, the downstream portion being configured for slidable engagement with the interior locating surface of the nozzle body, the upstream portion having a fluid inlet formed therein to provide fluid communication between the fluid receiving section of the nozzle body and the interior swirl cavity of the swirl element, the interior swirl cavity being defined by an approximately curvilinear surface for imparting a spiral flow to the fluid passing therethrough and including a fluid outlet for discharging the spiral flow therefrom; and

    c) an orifice disc disposed within the central bore of the nozzle body and positioned upstream of the fluid discharge section of the nozzle body, the orifice disc including axially opposed upstream and downstream surfaces defining a peripheral surface therebetween which is configured for slidable engagement with the interior locating surface of the nozzle body, the orifice disc further including a spray orifice that extends between the opposed upstream and downstream surfaces and is in fluid communication with the fluid outlet of the swirl cavity and the discharge section of the nozzle body, the spray orifice emitting the spiral flow in an atomized manner; and

    d) locking means disposed within the central bore of the nozzle body and positioned upstream of the swirl element for holding the swirl element and the orifice disc in place, wherein the locking means includes two radially opposed recesses formed in the central bore of the nozzle body and a locking plate which is rotatably engaged within the radially opposed recesses formed in the central bore of the nozzle body.

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