Hand held appliance

Patent metadata

Field	Value
Publication number	US-10687595-B2
Application number	US-201715616693-A
Country	US
Kind code	B2
Filing date	Jun 7, 2017
Priority date	Mar 30, 2012
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A hand held appliance, such as a hairdryer, includes a body, a fluid flow path extending through the body in an axial direction from a first fluid inlet through which a first fluid flow enters the appliance to a first fluid outlet for emitting the first fluid flow from the appliance, a primary fluid flow path extending from a second fluid inlet through which a primary fluid flow enters the appliance to a second fluid outlet, a section of the primary fluid flow path extending through the body in the axial direction and surrounding the fluid flow path, and a heater located within the section of the primary fluid flow path for heating fluid passing through the primary fluid flow path, and wherein the heater has a length extending in the axial direction.

First claim

The invention claimed is:

1. A hairdryer comprising a body and a handle, the body having an inlet end and an outlet end, and a first fluid flow path extending through the body in an axial direction from a first fluid inlet through which a first fluid flow enters the hairdryer at the inlet end to a first fluid outlet for emitting the first fluid flow from the hairdryer at the outlet end, wherein a primary fluid flow path extends from a second fluid inlet in the handle through which a primary fluid flow enters the hairdryer to a second fluid outlet at the outlet end of the body, and within the body, the primary fluid flow path surrounds the first fluid flow path, wherein a first end of the handle is connected to the body and the second fluid inlet is located at a second end of the handle that is spaced from the first end in a longitudinal direction of the handle, and wherein a fan unit is located in a first duct in the handle for drawing fluid through the second fluid inlet and the fan unit is spaced in the longitudinal direction from the second fluid inlet and the second end so that a portion of the first duct is located between the second fluid inlet and the fan unit in the longitudinal direction.

2. The hairdryer of claim 1 , wherein the body comprises a second duct extending between the inlet end and the outlet end.

3. The hairdryer of claim 2 , wherein the second duct partially defines at least one of the first fluid inlet and the first fluid outlet.

4. The hairdryer of claim 1 , wherein fluid is drawn through the first fluid flow path by emission of fluid from the primary fluid flow path.

5. The hairdryer of claim 1 , wherein the second fluid outlet extends about the first fluid flow path.

6. The hairdryer of claim 1 , wherein the second fluid outlet is annular.

7. The hairdryer of claim 1 , wherein the second fluid outlet is arranged to emit fluid into the first fluid flow path.

8. The hairdryer of claim 1 , wherein the second fluid outlet extends about the first fluid outlet.

9. The hairdryer of claim 1 , wherein a heater is located in the primary fluid flow path for heating the primary fluid flow.

10. The hairdryer of claim 9 , wherein the heater is located in the body.

11. The hairdryer of claim 10 , wherein the heater at least partially surrounds the first fluid flow path.

12. The hairdryer of claim 1 , wherein during use, the first fluid flow is caused by the primary fluid flow exiting the second fluid outlet.

13. A hairdryer comprising a body and a handle, the body having an inlet end and an outlet end, a fluid flow path extending through the body in an axial direction from a first fluid inlet through which a first fluid flow enters the hairdryer at the inlet end to a first fluid outlet for emitting the first fluid flow from the hairdryer at the outlet end, a primary fluid flow path extending at least partially along a second axis from a second fluid inlet through which a primary fluid flow enters the hairdryer through a fan unit towards a second fluid outlet at the outlet end of the body, a section of the primary fluid flow path extending through the body in the axial direction and surrounding the fluid flow path, wherein a first end of the handle is connected to the body and the second fluid inlet is located at a second end of the handle that is spaced from the first end in a longitudinal direction of the handle, wherein the fan unit is located in a first duct in the handle for drawing fluid through the second fluid inlet and the fan unit is spaced in the longitudinal direction from the second fluid inlet and the second end so that a portion of the first duct is located between the second fluid inlet and the fan unit in the longitudinal direction, wherein the fan unit comprises an impeller and the impeller rotates about a rotation axis that is parallel to the second axis, and wherein a heater is located in the primary fluid flow path for heating the primary fluid flow.

14. The hairdryer of claim 13 , wherein the second axis extends in the longitudinal direction of the handle.

15. The hairdryer of claim 13 , wherein the rotation axis extends in the longitudinal direction of the handle.

16. The hairdryer of claim 13 , wherein the heater is located in the body.

17. The hairdryer of claim 16 , wherein the heater at least partially surrounds the first fluid flow path.

18. The hairdryer of claim 13 , wherein during use, the first fluid flow is caused by the primary fluid flow exiting the second fluid outlet.

Assignees

• Dyson Technology Ltd

Inventors

• Courtney Stephen Benjamin
• Moloney Patrick Joseph William
• Shelton Edward Sebert Maurice
• Gammack Peter David

Classifications

• F24H3/0423

  hand-held air guns · CPC title

• A45D20/12 Primary

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

• A45D20/10 Primary

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

• A45D20/04 Primary

  Hot-air producers (A45D20/20, A45D20/22 take precedence) · CPC title

• F24H9/0063

  in air channels · CPC title