Fluid flow nozzle

1. A fluid flow nozzle comprising:

an elongated body having an inlet end and an outlet end, the inlet end configured for engagement to a fluid supply, the elongated body defining a channel extending therethrough from said inlet end to said outlet end;

said channel including an inlet channel adjacent said inlet end and an outlet channel adjacent said outlet end, said inlet channel defined at an inlet diameter and said outlet channel defined at an outlet diameter that is less than said inlet diameter;

said channel further defining a tapered channel extending from said inlet channel to said outlet channel and having a length between said inlet and outlet channels; and

said elongated body further defining a plurality of vanes circumferentially spaced around said tapered channel in a substantially spiral shape to impart a rotational momentum on fluid flowing through the channel, said plurality of vanes extending along at least a portion of the length of said tapered channel.

2. The fluid flow nozzle of claim 1 , wherein said tapered channel includes a first tapered channel adjacent said inlet channel and a second tapered channel adjacent said outlet channel, said plurality of vanes defined only in said first tapered channel.

3. The fluid flow nozzle of claim 2 , wherein said first and second tapered channel are defined at the same taper angle.

4. The fluid flow nozzle of claim 3 , wherein said taper angle is about thirteen degrees (13°).

5. The fluid flow nozzle of claim 2 , wherein said plurality of vanes are tapered from a maximum height adjacent said inlet channel to substantially zero height adjacent said second tapered channel.

6. The fluid flow nozzle of claim 1 , wherein said inlet channel has a substantially constant diameter equal to said inlet diameter and said outlet channel has a substantially constant diameter equal to said outlet diameter.

7. The fluid flow nozzle of claim 6 , wherein said inlet diameter is about four (4) times greater than said outlet diameter.

8. The fluid flow nozzle of claim 6 , wherein said outlet channel has a length from said second tapered channel to said outlet end that is about forty percent (40%) of the length of said tapered channel.

9. The fluid flow nozzle of claim 1 , wherein the outer surface of said elongated body is tapered from said inlet end to said outlet end and said body further defines strengthening ribs extending along said outer surface form said inlet end to said outlet end.

10. The fluid flow nozzle of claim 1 , wherein said plurality of vanes extend along said tapered channel from said inlet end to said outlet end.

11. The fluid flow nozzle of claim 10 , wherein said plurality of vanes have an first end adjacent said inlet end of said nozzle and a second end adjacent said outlet end of said nozzle, said first end and said second arranged at substantially the same angular position around the circumference of said tapered channel.

12. The fluid flow nozzle of claim 10 , wherein said outlet channel has a length from said tapered channel to said outlet end that is about forty percent (40%) of the length of said tapered channel with a substantially constant diameter equal to said outlet diameter.

13. The fluid flow nozzle of claim 1 , wherein said plurality of vanes includes four (4) vanes.

14. A fluid flow nozzle comprising:

an elongated body having an inlet end and an outlet end, the inlet end configured for engagement to a fluid supply, the elongated body defining a channel extending therethrough from said inlet end to said outlet end;

said channel including an inlet channel adjacent said inlet end and an outlet channel adjacent said outlet end, said inlet channel defined at an inlet diameter and said outlet channel defined at an outlet diameter that is less than said inlet diameter;

said channel further defining a tapered channel extending from said inlet channel to said outlet channel and having a length between said inlet and outlet channels; and

said elongated body further defining a plurality of grooves circumferentially spaced around said tapered channel portion in a substantially spiral shape to impart a rotational momentum on fluid flowing through the channel, said plurality of grooves extending along at least a portion of the length of said tapered channel.

15. The fluid flow nozzle of claim 14 , wherein said plurality of grooves includes at least six (6) grooves.

16. The fluid flow nozzle of claim 14 , wherein said plurality of grooves extend along said tapered channel from said inlet end to said outlet end.

17. The fluid flow nozzle of claim 16 , wherein said plurality of grooves have an first end adjacent said inlet end of said nozzle and a second end adjacent said outlet end of said nozzle, said first end and said second arranged at different angular positions around the circumference of said tapered channel.

18. The fluid flow nozzle of claim 1 , further comprising an attachment adapted to be mounted to said elongated body, said attachment including:

a plurality of orifices having differently configured discharge configurations; and

a mating face at each orifice adapted to be selectively aligned with said outlet channel, each orifice having a diameter at said mating face that is substantially equal to said outlet diameter.

19. The fluid flow nozzle of claim 2 , wherein said first tapered channel extends along about two-thirds (⅔) of the length of said tapered channel.