Laser welded pneumatic deicer boots for aircraft

Patent metadata

Field	Value
Publication number	US-12110118-B2
Application number	US-202217859416-A
Country	US
Kind code	B2
Filing date	Jul 7, 2022
Priority date	Apr 1, 2022
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

Ice may form along the leading edge of an aircraft wing or horizontal and vertical stabilizers. A pneumatic deicer system may be configured to inflate and dislodge ice along the leading edge of lift and control surfaces. The pneumatic deicer system may comprise a laser welded deicing boot attached to the leading edge. The compressed air can be directed to the deicing boot, inflating the deicing boot along inflatable tubes formed by laser welds, which can crack and dislodge the ice. A method of manufacturing a laser welded pneumatic deicer boot is also disclosed.

First claim

What is claimed is:

1. A method of manufacture for a pneumatic deicer boot, comprising:
aligning a non-stretchable fabric layer and a stretchable fabric layer at a welding position;
generating a concentrated laser;
focusing the concentrated laser along a first weld line to laser weld together the stretchable fabric layer and the non-stretchable fabric layer, wherein the first weld line includes a plurality of air passage gaps to assist in even inflation and deflation between adjacent inflatable tubes of a plurality of inflatable tubes; and
focusing the concentrated laser along a second weld line to laser weld together the stretchable fabric layer and the non-stretchable fabric layer, wherein the second weld line includes a plurality of air passage gaps to assist in even inflation and deflation between the adjacent inflatable tubes of the plurality of inflatable tubes, wherein a first gap remains between the stretchable fabric layer and the non-stretchable fabric layer, and wherein the first gap, the first weld line and the second weld line form a first inflatable tube of the plurality of inflatable tubes; and
bonding an installation layer to the non-stretchable fabric layer of the inflatable carcass.

2. The method of manufacture of claim 1 , wherein the method of manufacture further comprises forming a polymer layer on the stretchable fabric layer of the inflatable carcass.

3. The method of manufacture of claim 2 , wherein the method of manufacture further comprises forming a weathering layer on the polymer layer.

4. The method of manufacture of claim 3 , wherein the method of manufacture further comprises bonding an air inlet to the installation layer.

5. The method of manufacture of claim 4 , wherein the concentrated laser is an infrared laser.

6. The method of manufacture of claim 5 , wherein the non-stretchable fabric layer comprises nylon coated with a first polymeric coating compound.

7. The method of manufacture of claim 6 , wherein the stretchable fabric layer comprises nylon coated with a second polymeric coating compound.

8. The method of manufacture of claim 7 , wherein the second polymeric coating compound is thicker than the first polymeric coating compound.

9. A pneumatic deicer boot, comprising:
an installation layer; and
an inflatable carcass, comprising:
a non-stretchable fabric layer;
a stretchable fabric layer, wherein the non-stretchable fabric layer and the stretchable fabric layer are laser welded together at a first weld line and a second weld line, wherein the first weld line includes a plurality of air passage gaps to assist in even inflation and deflation between adjacent inflatable tubes of a plurality of inflatable tubes and wherein the second weld line includes a plurality of air passage gaps to assist in even inflation and deflation between the adjacent inflatable tubes of the plurality of inflatable tubes; and
a first inflatable tube of the plurality of inflatable formed by a gap between the first weld line and the second weld line.

10. The pneumatic deicer boot of claim 9 , wherein the pneumatic deicer boot further comprises a polymer layer.

11. The pneumatic deicer boot of claim 10 , wherein the pneumatic deicer boot further comprises a weathering layer.

12. The pneumatic deicer boot of claim 11 , wherein the pneumatic deicer boot further comprises a manifold in fluid communication with the first inflatable tube.

13. The pneumatic deicer boot of claim 12 , wherein the pneumatic deicer boot further comprises an air inlet disposed at the installation layer and in fluid communication with the manifold.

14. The pneumatic deicer boot of claim 13 , wherein the non-stretchable fabric layer comprises nylon coated with a first polymeric coating compound.

15. The pneumatic deicer boot of claim 14 , wherein the stretchable fabric layer comprises nylon coated with a second polymeric coating compound.

16. The pneumatic deicer boot of claim 15 , wherein the second polymeric coating compound is thicker than the first polymeric coating compound.

17. A pneumatic deicer system, comprising:
a pneumatic deicer boot, wherein the pneumatic deicer boot comprises:
an installation layer;
an inflatable carcass bonded to the installation layer, comprising:
a non-stretchable fabric layer;
a stretchable fabric layer, wherein the non-stretchable fabric layer and the stretchable fabric layer are laser welded together at a first weld line and a second weld line, wherein the first weld line includes a plurality of air passage gaps to assist in even inflation and deflation between adjacent inflatable tubes of a plurality of inflatable tubes and wherein the second weld line includes a plurality of air passage gaps to assist in even inflation and deflation between the adjacent inflatable tubes of the plurality of inflatable tubes; and
a first inflatable tube of the plurality of inflatable formed by a gap between the first weld line and the second weld line;

an air inlet coupled to the installation layer and in fluid communication with the first inflatable tube; and
a compressed air source in fluid communication with the air inlet.

18. The pneumatic deicer system of claim 17 , wherein the non-stretchable fabric layer comprises nylon coated with a first polymeric coating compound.

19. The pneumatic deicer system of claim 18 , wherein the stretchable fabric layer comprises nylon coated with a second polymeric coating compound.

20. The pneumatic deicer system of claim 19 , wherein the second polymeric coating compound is thicker than the first polymeric coating compound.

Assignees

• Goodrich Corp

Inventors

• Dattatri Shyam Kumar
• Venkateshaiah Harish
• Patil Rhushikesh
• Nanjundegowda Harshavardhana

Classifications

• B32B27/12

  next to a fibrous or filamentary layer · CPC title

• B32B2250/04

  4 layers · CPC title

• B32B2605/18

  Aircraft · CPC title

• B29L2022/02

  Inflatable articles (balls B29L2031/54 {; inner tyres B29L2023/245}) · CPC title

• B32B2255/26

  Polymeric coating · CPC title