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1. WO2020201667 - PIPES FOR CARRYING WATER

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

1. A water delivery pipe made from PVC or PVCO and having an inner surface which is rifled.

2. A pipe according to Claim 1 , wherein the inner surface comprises a graphene material.

3. A pipe according claim 2, wherein the graphene material is graphene or graphene oxide.

4. A pipe according to any of the preceding claims, wherein the pipe has a circular or rectangular cross section.

5. A pipe according to any of the preceding claims, wherein the inner surface comprises grooves and lands arranged in a spiral configuration around the longitudinal axis of the pipe.

6. A pipe according to Claim 5, wherein the grooves are rectangular in cross section.

7. A pipe according to Claim 6, wherein the grooves are square in cross-section.

8. A pipe according to Claim 5, wherein the grooves are semi-lunar in cross-section.

9. A pipe according to Claim 5, wherein the grooves are semi-triangular in cross-section.

10. A pipe according to Claim 5, wherein the grooves are octagonal in cross-section.

11. A pipe according to any of Claims 5 to 10, wherein the grooves form a series of sawtooth wave-like arrangements having positive and negative ramps.

12. A pipe according to Claim 11 , wherein the positive ramps are concave in shape and the negative ramps have steep edges which are perpendicular to the wavelength.

13. A pipe according to any of the preceding claims, wherein rectangular shaped holes or punctures are provided along the pipe to which are attached drinking nipples.

14. A pipe according to Claim 13, wherein the nipples are coated with graphene or graphene oxide or any other graphene related material.

15. A method of making a water delivery pipe made from PVC or PVCO and having an inner surface which is rifled, the method comprising providing a PVC or PVCO pipe and rifling the inner surface of the pipe.

16. A method according to Claim 15, wherein the pipe is made by injection moulding or 3D printing.

17. A method according to Claim 15 or Claim 16, wherein, after the inner surface of the pipe is rifled, a graphene related material is applied thereto.

18. A method according to Claim 17, wherein the graphene material is applied to the inner surface of the pipe by a coating or doping process.

19. A method according to Claim 16, wherein the pipe is made by a 3D printing process which comprises successive printing of PVC or PVCO layers, rifled PVC or PVCO layers and graphene material layers.

20. A method according to Claim 15 or Claim 16, wherein the pipe is made by injection moulding a mixture comprising PVC or PVCO and graphene material.