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1. (WO2018071965) MINE VENTILATION ASSEMBLY
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The claims defining the invention are as follows:

1 . A ventilating assembly for ventilating underground mines, the assembly comprising:

a body defining an elongate passage for allowing flow of fluid therethrough, the passage being positioned relative to an inlet for receiving fluid and an outlet for expelling the fluid,

a fastening arrangement for fastening the body to a supporting structure and

a nozzle positioned inwardly in the body for releasing a stream of pressurised fluid in the passage to draw a fluid stream into the passage through the inlet and directing the flow of fluid in the passage in a general direction from the inlet towards the outlet.

2. A ventilating assembly in accordance with claim 1 wherein the nozzle is positioned for providing the stream of pressurised fluid in a circular or spiral pattern.

3. A ventilating assembly in accordance with any one of claim 1 or claim 2 further comprising a plurality of vanes or fins positioned in the passage for controlling the direction of the flow of fluid through the passage, during use.

4. A ventilating assembly in accordance with claim 3 wherein the vanes or fins are provided in a collar member positioned along an inner wall of the body defining the passage.

5. A ventilating assembly in accordance with any one of the preceding claims wherein the nozzle comprises a plurality of spaced apart surfaces, said surfaces defining a fluid flow cavity extending substantially around a peripheral portion of the body, wherein the pressurised fluid is received into the cavity and released out of the nozzle through a mouth of the nozzle.

6. A ventilating assembly in accordance with claim 5 wherein the nozzle comprises a converging entrance for receiving the pressurised fluid and a throat portion in fluid communication with the mouth, such that flow of the pressurised fluid through the throat portion increases velocity of the pressurised fluid and reduces static pressure of the fluid before exiting the nozzle through the mouth of the nozzle.

7. A ventilating assembly in accordance with claim 5 or claim 6 wherein the mouth is directed inwardly into the passage, the mouth being adapted for releasing the stream of pressurised fluid into the passage during use.

8. A ventilating assembly in accordance with any one of claims 5 to 7 wherein the cavity of the nozzle is defined by a first surface spaced away from a second surface such that the first and second surfaces converge towards each other to form the mouth.

9. A ventilating assembly in accordance with any one of claims 5 to 8 wherein the cavity of the nozzle is defined by an internal space in between two concentrically positioned hollow conical frustums formed in the body.

10. A ventilating assembly in accordance with any one of claims 5 to 9 wherein the cavity of the nozzle is defined by an inner slanting surface of a section of a first hollow conical body, said inner slanting surfaced being spaced away from an outer slanting surface of a section of a second hollow conical body.

1 1 . A ventilating assembly in accordance with claim 10 wherein the inner slanting surface is provided by a section of the first hollow conical body having a first slant length and wherein the outer slanting surface is provided by a section of the second hollow conical body having a second slant length and wherein slant angle of the first hollow conical body is less than the slant angle of the second hollow conical body.

12. A ventilating assembly in accordance with any one of the preceding claims wherein the nozzle extends circumferentially about an imaginary longitudinal axis of the passage.

13. A ventilating assembly in accordance with any one of the preceding claims wherein the nozzle includes one or more connectors for connecting one or more fluid lines for receiving pressurised fluid, said connectors being preferably positioned along an outer wall portion of the body.

14. A ventilating assembly in accordance with any one of the preceding claims comprising at least a first plurality of connectors for connecting a first plurality of one or more fluid lines and receiving a first pressurised fluid; and at least a second plurality of connectors for connecting a second plurality of one or more fluid lines for receiving a second pressurised fluid.

15. A ventilating assembly in accordance with claim 14 wherein the first plurality of connectors is adapted to be connected to one or more fluid lines supplying pressurised air and the second plurality of connectors is adapted to be connected to a second plurality of one or more fluid lines supplying pressurised water.

16. A ventilating assembly in accordance with any one of claims 13 to 15 wherein said one or more connectors are disposed obliquely relative to an imaginary longitudinal axis of the body.

17. A ventilating assembly in accordance with any one of the preceding claims further comprising an inter-locking mechanism for inter-locking two or more of said assemblies for allowing passage of fluid from at least a first ventilating assembly to a second ventilating assembly during use.

18. A ventilating assembly in accordance with claim 17 wherein the inlet and the outlet of the passage include respective engaging portions for

allowing the inlet of a first ventilating assembly to be fluidly coupled with the outlet of a second ventilating assembly.

19. A ventilating assembly in accordance with any one of claims 17 or 18 wherein the engagement portion of the inlet forms one of a male or female coupling portion and the engagement portion of the outlet forms the other of the male or female coupling portion to allow the inlet of a first ventilating assembly to be fluidly coupled with the outlet of a second ventilating assembly during use.

20. A ventilating assembly in accordance with any one of the preceding claims wherein the passage is substantially cylindrical.

22. A ventilating assembly in accordance with any one of the preceding claims wherein the inlet and/or outlet of the passage comprises a substantially circular opening for allowing passage of fluid therethrough.

23. A ventilating assembly in accordance with any one of the preceding claims wherein the body is formed from carbon fiber composite material.