Hand held appliance

Patent metadata

Field	Value
Publication number	US-11712098-B2
Application number	US-201816477468-A
Country	US
Kind code	B2
Filing date	Jan 11, 2018
Priority date	Jan 12, 2017
Publication date	Aug 1, 2023
Grant date	Aug 1, 2023

Abstract

A heater including a ceramic heater element and ceramic heat sink whereby the ceramic heater element and the ceramic heat sink are both formed from a plurality of layers of tape cast ceramic material. The ceramic heater element may be generally planar and extends within a first plane. The ceramic heat sink may extend in a second plane which is orthogonal to the first plane. The ceramic heat sink may include a plurality of fins which may be discrete. The layers of the ceramic heater element may be orientated orthogonal to the layers of the ceramic heat sink. The ceramic heater element may comprise a conductive track which may be surface mounted to a distal side of the ceramic heater element than the ceramic heat sink or embedded within the ceramic heater element.

First claim

The invention claimed is:

1. A heater comprising a ceramic heater element and ceramic heat sink, wherein the ceramic heater element and the ceramic heat sink are both formed from a plurality of layers of tape cast ceramic material; wherein the layers of the ceramic heater element are parallel to a first plane, the layers of the ceramic heat sink are parallel to a second plane, and the first plane is orthogonal to the second plane.

2. The heater of claim 1 , wherein the ceramic heater element is planar and extends within the first plane.

3. The heater of claim 2 , wherein the ceramic heat sink extends in the second plane.

4. The heater of claim 1 , wherein the ceramic heat sink comprises a plurality of fins.

5. The heater of claim 4 , wherein each one of the plurality of fins is discrete.

6. The heater of claim 1 , wherein the ceramic heater element comprises a conductive track.

7. The heater of claim 6 , wherein the conductive track is surface mounted to a distal side of the ceramic heater element than the ceramic heat sink.

8. The heater of claim 7 , wherein the conductive track is coated with an insulating material.

9. The heater of claim 7 , wherein the conductive track is embedded within the ceramic heater element.

10. The heater of claim 1 , wherein the ceramic heat sink is bonded to a surface of the ceramic heater element.

11. The heater of claim 1 , wherein the ceramic heater element is curved, arcuate or quadrilateral.

12. The heater of claim 11 , wherein the ceramic heater is curved or arcuate and the ceramic heat sink follows a same arc as the ceramic heater element.

13. A hand held appliance comprising a heater comprising a ceramic heater element and ceramic heat sink, wherein the ceramic heater element and the ceramic heat sink are both formed from a plurality of layers of tape cast ceramic material; wherein the layers of the ceramic heater element are parallel to a first plane, the layers of the ceramic heat sink are parallel to a second plane, and the first plane is orthogonal to the second plane.

14. The appliance of claim 13 , wherein the appliance is a hair care appliance.

15. The appliance of claim 14 , wherein the hair care appliance is a hairdryer.

Assignees

• Dyson Technology Ltd

Inventors

• Guerreiro Ilidio Silvestre
• Saunders Samuel William
• Shelton Edward Sebert Maurice
• Naicker Lolan
• Crawford Kyle James

Classifications

• A45D20/12 Primary

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

• A45D1/00

  Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor · CPC title

• A45D2/001

  Hair straightening appliances · CPC title

• H05B3/141

  Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds · CPC title

• A45D20/30 Primary

  Electric circuitry specially adapted for hair drying devices · CPC title