SURFACE TREATING HEAD

• US 20100229339A1
• Filed: 03/11/2010
• Published: 09/16/2010
• Est. Priority Date: 03/12/2009
• Status: Active Grant

• Current Assignee: Dyson Technology Limited (Beeswax Holdings UK Limited)
• Original Assignee: Dyson Technology Limited (Beeswax Holdings UK Limited)
• Inventors: Lambourn, Henry Licming
• Granted Patent: US 8,468,647 B2
• Time in Patent Office: Days
• US Class Current: 15/415.100
• CPC Class Codes: A47L 9/02 Nozzles suction nozzles for fluid transport B65G51/00

Abstract

A surface treating head in the form of a floor tool for a vacuum cleaner includes a main body, a suction cavity and an outlet. The suction cavity includes first and second suction channels bounded on both sides by respective working edges. A fluid flow path extends from the first suction channel to the second suction channel and from there to the outlet. The plurality of suction channels permits effective pick-up of dirt, which may be further enhanced by an air duct, in the form of a slot, which draws air over some of the working edges. The invention permits a tool with a lower profile to be manufactured than would be achievable by providing separate flow paths between the respective channels and the outlet.

Claims

1. A surface treating head comprising a main body;

a suction cavity in the main body comprising first and second suction channels, each of which is bounded on at least one side by a working edge;

an outlet; and

a fluid flow path in the suction cavity extending from the first channel to the second channel, and from the second channel to the outlet.

2. A surface treating head as claimed in claim 1, wherein the second channel is located between the first channel and the outlet.

3. A surface treating head as claimed in claim 1, comprising an air duct, open to atmosphere, interposed between the first and second suction channels.

4. A surface treating head as claimed in claim 3, wherein the air duct extends between upper and lower surfaces of the main body.

5. A surface treating head as claimed in claim 3, wherein the air duct is adjacent at least one working edge.

6. A surface treating head as claimed in claim 1, wherein each suction channel is bounded on both sides thereof by respective working edges.

7. A surface treating head as claimed in claim 1, wherein at least one working edge extends substantially the full width of the main body.

8. A surface treating head as claimed in claim 1, wherein the fluid flow path includes an intermediate channel between the first and second suction channels.

9. A surface treating head as claimed in claim 8, wherein the fluid flow path includes a second intermediate channel between the first and second suction channels.

10. A surface treating head as claimed in claim 9, wherein the intermediate channels extend transversely to the first and second suction channels.

11. A surface treating head as claimed in claim 9, wherein the intermediate channels are located on opposite side portions of the main body.

12. A surface treating head as claimed in claim 1, wherein the fluid flow path includes a region of increasing cross section in the direction of flow.

13. A surface treating head as claimed in claim 12, wherein the region of increasing cross section comprises the first suction channel.

14. A surface treating head as claimed in claim 12, wherein the region of increasing cross section comprises the second suction channel.

15. A surface treating head as claimed in claim 1, comprising a bottom surface having at least one lint picker.

16. A surface treating head as claimed in claim 1, comprising a bleed valve arranged, in use, to admit atmospheric air into the tool depending on the pressure in the suction cavity.

17. A surface treating head as claimed in claim 1, comprising a flexible hose extending between the outlet and a connector.

18. A surface treating head as claimed in claim 17, wherein the connector is arranged to be connectable to the hose or wand of a surface-treating appliance.

19. A surface treating appliance incorporating a surface treating head as claimed in claim 1.

20. A surface treating appliance as claimed in claim 19, in the form of a vacuum cleaner.