Attachment for a handheld appliance

Patent metadata

Field	Value
Publication number	US-9808067-B2
Application number	US-201414339014-A
Country	US
Kind code	B2
Filing date	Jul 23, 2014
Priority date	Jul 24, 2013
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

An attachment for a handheld appliance, the attachment having a first end for connection to the appliance and a second end, a first wall extending from the first end towards the second end and defining a fluid flow path through the attachment, a second wall extending from the second end towards the first end about the first wall and defining a second fluid flow path extending between the first wall and the second wall. The first end of the appliance may be substantially circular. The fluid flow path may have a fluid inlet that may be annular at the first end. The fluid inlet may be defined by the first wall and an inner wall extending around and at least partially along the first wall. The inner wall may be substantially equidistant from the first wall around the fluid inlet. A hair care appliance comprises such as attachment.

First claim

The invention claimed is:

1. An attachment for a handheld appliance, the attachment having a first end for connection to the appliance and a second end, a first wall extending from the first end towards the second end and defining a first fluid flow path through the attachment, a second wall extending from the second end towards the first end about the first wall and defining a second fluid flow path extending between the first wall and the second wall, wherein a fluid inlet is defined by the first wall and a wall of a central portion, the first wall extends around and at least partially along the wall of the central portion, and the central portion is configured to at least partially block a fluid outlet of the handheld appliance.

2. The attachment for a handheld appliance of claim 1 , wherein the fluid inlet is annular.

3. The attachment of claim 2 , wherein the first end of the appliance is substantially circular.

4. The attachment of claim 1 , wherein a perimeter of the wall of the central portion is substantially equidistant from a perimeter of the first wall along all sides at the fluid inlet.

5. The attachment of claim 1 , wherein the first fluid flow path is defined by the first wall and the wall of the central portion.

6. The attachment of claim 5 , wherein a perimeter of the wall of the central portion is substantially equidistant from a perimeter of the first wall along a length of the wall of the central portion.

7. The attachment of claim 5 , wherein a perimeter of the wall of the central portion is substantially equidistant from a perimeter of the first wall on all sides along the wall of the central portion.

8. The attachment of claim 1 , wherein the second end of the attachment is non-circular.

9. The attachment of claim 8 , wherein the second end of the attachment has a dimension that is greater than the first end of the attachment.

10. The attachment of claim 9 , wherein the second end of the attachment describes an ellipse.

11. The attachment of claim 1 , wherein the second fluid flow path extends substantially continuously around the first fluid flow path.

12. The attachment of claim 1 , wherein the second wall comprises a fluid outlet from the attachment.

13. The attachment of claim 1 , wherein the first wall comprises a first section and a second section and the first section is a different shape than the second section.

14. The attachment of claim 13 , wherein the first section extends from the first end of the attachment.

15. The attachment of claim 13 , wherein the first section is frustoconical.

16. The attachment of claim 13 , wherein the second section extends from the first section towards the second end and the second section is elliptical.

17. The attachment of claim 13 , wherein the second wall extends from the second end at least partially along the second section of the first wall.

18. The attachment of claim 13 , wherein the wall of the central portion extends along the first section of the attachment.

19. The attachment of claim 18 , wherein a perimeter of the wall of the central portion is equidistant from a perimeter of the first wall along a length of the wall of the central portion.

20. The attachment of claim 18 , wherein a perimeter of the wall of the central portion is equidistant from a perimeter of the first wall on all sides along the wall of the central portion.

21. The attachment of claim 1 , wherein the second fluid flow path includes a fluid opening at the second end.

22. The attachment of claim 21 , wherein the fluid opening is defined by the first wall and the second wall.

23. The attachment for a handheld appliance of claim 1 , wherein a first fluid opening is defined by the first wall and the second wall.

24. The attachment of claim 23 , wherein the first fluid opening is elliptical.

25. The attachment of claim 23 , wherein the second fluid flow path includes a second fluid opening which is at least partially defined by the first wall.

26. The attachment of claim 25 , wherein either the first fluid opening or the second fluid opening is a fluid inlet.

27. The attachment of claim 25 , wherein either of the first fluid opening or the second fluid opening is a fluid outlet.

28. The attachment of claim 1 , wherein in use, fluid flowing in the first fluid flow path flows from the first end towards the second end.

29. The attachment of claim 1 , wherein in use, fluid flowing in the second fluid flow path flows either from the first end towards the second end or from the second end towards the first end.

30. The attachment of claim 1 , wherein fluid output from the attachment is output from the second end of the attachment.

31. The attachment of claim 30 , wherein the fluid output is a combination of fluid from the first fluid flow path and fluid from the second fluid flow path.

32. The attachment of claim 1 , wherein the attachment is configured so that fluid from the first fluid flow path flows along the second fluid flow path to a fluid opening formed between the first wall and the second wall.

33. The attachment of claim 1 , wherein the first wall is made from a plastic material.

34. The attachment of claim 1 , wherein the second wall is made from a plastic material.

35. The attachment of claim 1 , wherein the second wall is formed from a flexible material.

36. A hair care appliance comprising: a handle and a body, a primary fluid flow path extending from a primary fluid inlet into the appliance to a primary fluid outlet for emitting the fluid flow from a front end of the body, a fan unit for drawing primary flow into the primary fluid inlet and an attachment, the attachment having a first end for connection to the appliance and a second end, a first wall extending from the first end towards the second end and defining a first fluid flow path through the attachment, a second wall extending from the second end towards the first end about the first wall and defining a second fluid flow path extending between the first wall and the second wall, wherein a fluid inlet into the attachment is defined by the first wall and a wall of a central portion, the first wall extends around and at least partially along the wall of the central portion, and the central portion is configured to at least partially block a further fluid outlet of the hair care appliance.

37. The hair care appliance of claim 36 , wherein the first fluid flow path extends from the fluid inlet into the attachment to a fluid outlet from the second end of the attachment and the fluid inlet is in fluid communication with the primary fluid outlet.

38. The appliance of claim 36 , wherein the body comprises a duct; a further fluid flow path extending through the duct and from a further fluid inlet through which a further fluid flow enters the appliance to the further fluid outlet for emitting the further fluid flow from a front end of the body and wherein the appliance is configured so that further fluid flow is drawn through the further fluid flow path by fluid emitted from the primary fluid outlet.

39. The appliance of claim 38 , wherein the fluid inlet into the attachment is annular.

40. The appliance of claim 38 , wherein the

Assignees

• Dyson Technology Ltd

Inventors

• Sutter Catriona Ann Crawley
• Smith Stephen Farrar
• Shelton Edward Sebert Maurice
• Moloney Patrick Joseph William

Classifications

• A45D20/10 Primary

  Hand-held drying devices, e.g. air douches · CPC title

• A45D20/122

  Diffusers, e.g. for variable air flow · CPC title

• A45D20/12 Primary

  Details thereof or accessories therefor, e.g. nozzles, stands · CPC title

• F24H3/0423

  hand-held air guns · CPC title