Cleaner

1. A cleaner for use in washing an internal surface of a container, the cleaner comprising:

an elongate boom having a head;

the head having a pressure chamber, a locating sleeve, and a multiplicity of nozzles in fluid communication with the pressure chamber, wherein at least a portion of each nozzle is angled with respect to a longitudinal axis of the head and the angled portion of each nozzle extends through the locating sleeve to support each nozzle;

wherein the length of each nozzle is at least ten times an internal diameter of a nozzle end and creates a substantially laminar flow in fluid passing through.

2. The cleaner of claim 1 , further comprising a rotator to oscillate or rotate the head.

3. The cleaner of claim 1 wherein the angle between the angled portion of each nozzle and the longitudinal axis of the head is between 60-85°.

4. The cleaner of claim 1 wherein the angle between the angled portion of each nozzle and the longitudinal axis of the head is 75°.

5. The cleaner of claim 1 , further comprising a pump to supply water to the head.

6. The cleaner of claim 5 , wherein the pump comprises an oil assisted diaphragm pump.

7. The cleaner of claim 1 , wherein a support is used to mount the elongate boom.

8. The cleaner of claim 7 , wherein the elongate boom is moveable between an extended position and a retracted position with respect to the support.

9. The cleaner of claim 7 , wherein a stand is used to mount the support.

10. The cleaner of claim 9 , wherein the height of the stand is adjustable.

11. The cleaner of claim 1 , wherein each nozzle has a nozzle end through which water exits, the nozzle ends being arranged in a helical manner around the pressure chamber.

12. The cleaner of claim 1 , wherein the length of each nozzle is at least fourteen times the length of the internal diameter of the nozzle end.

13. The cleaner of claim 1 , wherein each nozzle comprises three portions; a first portion in fluid communication with the pressure chamber, a second portion disposed parallel to the longitudinal axis of the head, and a third portion disposed at an angle with respect to the longitudinal axis.

14. The cleaner of claim 1 , wherein a portion of each nozzle passes through the longitudinal axis of the head.

15. The cleaner of claim 1 , wherein the pressure chamber is cylindrical.

16. The cleaner of claim 1 , wherein each nozzle has an orifice with a circular cross section.

17. A method of cleaning a container including the steps of:

moving an elongate boom having a boom body and a head until at least the head is located within the container;

passing water through a pressure chamber and a multiplicity of nozzles forming part of the head, wherein the length of each nozzle is at least ten times an internal diameter of a nozzle and at least a portion of each nozzle is angled with respect to a longitudinal axis of the head, wherein the angled portion of each nozzle extends through a locating sleeve of the head to support each nozzle;

pumping water through each nozzle, such that the water exits each nozzle as a substantially laminar flow; and

oscillating or rotating the head.

18. The method of claim 17 , wherein the container is a concrete truck bowl and the step of moving an elongate boom until at least the head is located within the container comprises:

adjusting the height of the boom until the boom is substantially aligned with a central axis of the concrete truck bowl; and

extending the boom body such that the head of the elongate boom enters the bowl of the concrete truck.

19. A head for a cleaner, the head comprising:

a pressure chamber to receive a fluid;

a multiplicity of nozzles in fluid communication with the pressure chamber, wherein at least a portion of each nozzle is angled with respect to a longitudinal axis of the head; and

a locating sleeve, wherein the angled portion of each nozzle extends through the locating sleeve to support each nozzle;

wherein the length of each nozzle is at least ten times an internal diameter of a nozzle end and creates a substantially laminar flow in fluid passing through.

20. The head of claim 19 , wherein the length of each nozzle is at least fourteen times the length of the internal diameter of the nozzle end.

21. The head of claim 19 , further comprising at least one guard rail to protect the nozzles.

22. The head of claim 19 , wherein the angle between the angled portion of each nozzle and the longitudinal axis of the head is between 60-85°.

23. The head of claim 19 , wherein the angle between the angled portion of each nozzle and the longitudinal axis of the head is 75°.