Heater for a hand held appliance

Patent metadata

Field	Value
Publication number	US-9510395-B2
Application number	US-201414331755-A
Country	US
Kind code	B2
Filing date	Jul 15, 2014
Priority date	Jul 16, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A heater for a hand held appliance, the heater comprising a first layer, a second layer and a separator for separating the first and second layers of the heater wherein the separator is a tube. The first layer and/or second layer may be a wire element. The first layer may extend at least partially around and/or partially along the tube. The tube may comprise spacers extending along the tube and radially away from the tube for supporting the first layer. An outer tube may be provided wherein the outer tube extends at least around and along the first layer. The outer tube may extend around and along the tube. An inner support structure for supporting the second layer may be provided. The inner support structure may comprise an inner tube or support wings and the second layer may extend at least partially around the inner tube or support wings.

First claim

The invention claimed is:

1. A heater for a hand held appliance, the heater comprising a first layer, a second layer, a separator for separating the first and second layers of the heater, and an inner support structure for supporting the second layer, wherein the separator is a tube, the first layer comprises a wire element that is wound at least partially around the tube, and the inner support structure comprises an inner tube.

2. The heater of claim 1 , wherein the first layer is a wire element.

3. The heater of claim 1 , wherein the second layer is a wire element.

4. The heater of claim 1 , wherein the first layer extends at least partially along the tube.

5. The heater of claim 1 , wherein the tube comprises spacers extending along the tube and radially away from the tube for supporting the first layer.

6. The heater of claim 5 , wherein the spacers extend orthogonally away from the tube.

7. The heater of claim 5 , wherein the spacers include insertion recesses.

8. The heater of claim 7 , wherein the insertion recesses are substantially uniformly spaced along the length of the spacers.

9. The heater of claim 7 , wherein the wire element is located in the insertion recesses.

10. The heater of claim 1 , comprising an outer tube wherein the outer tube extends at least around and along the first layer.

11. The heater of claim 10 , wherein the outer tube extends around and along the tube.

12. The heater of claim 1 , wherein the tube extends around and at least partially along the inner tube.

13. The heater of claim 1 , wherein the tube extends around and along the inner tube.

14. The heater of claim 1 , wherein the second layer extends at least partially around the inner tube.

15. The heater of claim 1 , wherein the second layer extends at least partially along the inner tube.

16. The heater of claim 1 , wherein the inner tube comprises inner spacers extending along and radially away from the tube for supporting the second layer.

17. The heater of claim 16 , wherein when the inner tube is inserted within the tube, the inner spacers maintain the position of the inner tube within the tube.

18. The heater of claim 16 , wherein the inner spacers extend orthogonally away from the inner tube.

19. The heater of claim 16 , wherein the inner spacers include insertion recesses.

20. The heater of claim 19 , wherein the insertion recesses are substantially uniformly spaced along the length of the inner spacers.

21. The heater of claim 19 , wherein a wire element is located in the insertion recesses.

22. The heater of claim 21 , wherein when the inner tube is inserted in the tube, the wire element is fixed in location in the insertion recesses.

23. The heater of claim 1 , wherein the inner support structure comprises support wings.

24. The heater of claim 23 , wherein when the inner support structure is inserted within the tube, the support wings maintain the position of the inner support structure within the tube.

25. The heater of claim 23 , wherein the support wings extend at least partially along the length of the tube.

26. The heater of claim 23 , wherein the support wings include extensions which extend radially towards the tube.

27. The heater of claim 26 , wherein the second layer is supported by the extensions.

28. The heater of claim 27 , wherein the extensions include insertion recesses for supporting the second layer.

29. The heater of claim 28 , wherein the insertion recesses are substantially uniformly spaced along the length of the extensions.

30. The heater of claim 28 , wherein the second layer is a wire element and the wire element is located in the insertion recesses.

31. The heater of claim 30 , wherein when the inner support structure is inserted in the tube, the wire element is fixed in location in the insertion recesses.

32. The heater of claim 1 , wherein the separator is made from an insulating material.

33. The heater of claim 32 , wherein the separator is formed from Mica.

34. The heater of claim 3 , wherein the first layer and the second layer are formed from different wire elements.

35. A hair care appliance comprising the heater of claim 1 .

36. The hair care appliance of claim 35 , wherein the hair care appliance is a hairdryer.

37. The hair care appliance of claim 35 , wherein the hair care appliance is a hot styling brush.

Assignees

• Dyson Technology Ltd

Inventors

• Coulton Robert Mark Brett
• Tweedie Robert Lawrence
• Hewitt James Richard Warren
• Moloney Patrick Joseph William

Classifications

• F24H3/0423

  hand-held air guns · CPC title

• A45D20/48

  Hair-drying combs or hair-drying brushes, with internal heating means · CPC title

• H05B3/44 Primary

  heating conductor arranged within rods or tubes of insulating material · CPC title

• H05B1/0252

  Domestic applications · CPC title

• H05B2203/014

  Heaters using resistive wires or cables not provided for in H05B3/54 · CPC title