Nozzle for agricultural sprayers

• US 6,557,787 B2
• Filed: 05/28/2002
• Issued: 05/06/2003
• Est. Priority Date: 09/27/2001
• Status: Expired due to Term

• Current Assignee: Sta-Rite Industries LLC (Pentair Plc (Ireland))
• Original Assignee: HY-PRO Corporation (Donaldson Company Incorporated)
• Inventors: Swan, Trevor William Bartlett
• Primary Examiner(s): DOUGLAS, LISA ANN
• Application Number:
  US10/156,265
• Publication Number:
  US 20030057302A1
• Time in Patent Office: 343 Days
• Field of Search: 239/597, 239/398, 239/407, 239/589, 239/598, 239/599, 239/601, 239/266, 239/267
• US Class Current: 239/597
• CPC Class Codes: B05B 1/267 the liquid or other fluent material being deflected in determined directions
• CPC Class Codes: B05B 15/65 Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
• CPC Class Codes: B05B 7/0425 without any source of compressed gas, e.g. the air being sucked by the pressurised liquid

Abstract

A nozzle for delivering fluid evenly over a wide swath is disclosed. The nozzle has an elongated tip which has a stepped slot. Air eduction is also provided to reduce drift of the fluid being delivered through the nozzle.

Claims

1. A nozzle comprising:

a. a spray tip having a base at its upstream end, an elongated member projecting from said base and terminating in a downstream end, and an open slot extending substantially the length of said spray tip, said slot having a pair of sides, each of said sides having a plurality of steps such that said slot is narrowest near the downstream end;

b. a spray tip connector having an opening therethrough and adapted to be connected to a tube such that fluid passing through said tube also passes through said opening; and

c. a cap for securing said spray tip so that fluid passing through said opening in said spray tip connector passes through said slot.

2. The nozzle of claim 1 wherein said slot and said steps are arranged such that air is drawn into said slot and mixed with fluid in said slot before said fluid exits said slot.

3. The nozzle of claim 1 further including a regulator disk having an orifice therethrough for controlling the flow of fluid into the spray tip.

4. The nozzle of claim 3 wherein said orifice is slightly non-symmetrical.

5. The nozzle of claim 1 further including an air eductor located between said base and said spray tip, said air eductor including a channel through which air can enter the air eductor to be combined with fluid passing through the nozzle.

9. The nozzle of claim 1 further including an air channel upstream of said spray tip which educts air into the nozzle.

6. A nozzle comprising:

a. a spray tip having an elongated member terminating in a downstream end and an open slot extending substantially the length of said spray tip, said slot having a pair of sides, each of said sides having a plurality of steps such that said slot is narrowest near the downstream end; and

b. a spray tip connector integrally formed with said spray tip upstream of said spray tip and adapted to be connected to a tube such that fluid can enter the nozzle through the tube.

7. The nozzle of claim 6 wherein said slot and said steps are arranged such that air is drawn into said slot and mixed with fluid in said slot before said fluid exits said slot.

8.The nozzle of claim 6 further including a flow regulator positioned upstream of said spray tip, said flow regulator having an orifice for controlling flow of liquid from the tube into said spray tip.

8. The nozzle of claim 8 wherein said orifice is non-symmetrical.

10. A nozzle for spraying liquid comprising:

a. a spray tip having a base at its upstream end, an elongated member projecting from said base and terminating in a downstream end, and an open slot extending substantially the length of said spray tip, said slot having a pair of sides, each of said sides having a plurality of steps such that said slot is narrowest near the downstream end;

b. means for connecting said spray tip to a source of liquid;

c. a flow restrictor; and

d. means for educting air into the nozzle.

11. The nozzle of claim 11 wherein said means for educting air into the nozzle includes at least a portion of said slot.

13. The nozzle of claim 11 wherein said means for educting air into the nozzle includes an air eductor having an interior chamber and at least one air entry channel in communication with said interior chamber.

12. The nozzle of claim 12 wherein said means for educting air into the nozzle further includes a mixing chamber between said flow restrictor and said spray tip.

14. A nozzle comprising:

a. A spray tip having a base at its upstream end, an elongated member projecting from said base and terminating at a downstream end, and an open slot extending substantially the length of said spray tip, said slot having a pair of sides, each of said sides having at least one step such that said slot is narrowest near the downstream end;

b. a spray connector having an opening therethrough, a seat member located in said opening;

a first connecting member adapted to be connected to a tube such that fluid passing through said tube also passes through said opening, and a second connecting member;

c. a flow regulation insert having an upstream extension, a flange, a downstream extension, and a lumen;

said upstream extension sized to fit within said opening of said spray connector and said downstream extension sized to fit within said open slot of said spray tip so that said downstream extension extends toward the downstream end of said spray tip;

d. a cap for securing said spray tip so that fluid passing through said opening in said spray tip connector passes through the lumen of said flow regulation insert and said slot of said spray tip.

15. The nozzle of claim 15 further including an O-ring that resides between said seat member of said spray connector and said flange of said flow regulation insert to form a seal.

16. The nozzle of claim 15 wherein said lumen of said flow regulation insert has a camber in the area where fluid exits said flow regulation insert.