Actuatable microstructures and methods of making the same

Patent metadata

Field	Value
Publication number	US-9932481-B2
Application number	US-201514692522-A
Country	US
Kind code	B2
Filing date	Apr 21, 2015
Priority date	Apr 21, 2015
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

Actuatable microstructures and methods of making the same are disclosed. An example a sheet includes a first side including an elastomeric material and a second side opposite the first side. The sheet defines sealed channels. In response to a pressure differential across the elastomeric material, the elastomeric material is to be in a deformed position relative to the sealed channels to define microstructures.

First claim

What is claimed is:

1. An apparatus, comprising:
a sheet comprising a first side comprising an elastomeric material and a second side opposite the first side, the sheet defining sealed channels including gas, in response to a pressure differential across the elastomeric material and without changing an amount of gas contained within the sealed channels, the elastomeric material to be in a deformed position relative to the sealed channels to define microstructures.

2. The apparatus of claim 1 , further comprising an adhesive on the second side to enable the sheet to be adhered to a vehicle.

3. The apparatus of claim 2 , wherein the vehicle comprises an aircraft and the sheet is coupled to a surface of the aircraft.

4. The apparatus of claim 2 , wherein the vehicle comprises an underwater craft and the sheet is coupled to a surface of the underwater craft.

5. The apparatus of claim 1 , wherein the sheet comprises a first layer and a second layer coupled to define the sealed channels.

6. The apparatus of claim 5 , wherein the first layer comprises a first material and the second layer comprises a second material, the first material being different than the second material.

7. The apparatus of claim 1 , wherein when the pressure differential across the elastomeric material is below a threshold value, the elastomeric material is to be in a non-deformed position relative to the sealed channels.

8. The apparatus of claim 1 , wherein when the elastomeric material is in the deformed position relative to the sealed channels, a portion of the elastomeric material is displaced away from the second side.

9. The apparatus of claim 1 , wherein when the elastomeric material is in the deformed position relative to the sealed channels, a portion of the elastomeric material is displaced toward the second side.

10. The apparatus of claim 1 , wherein the microstructures comprise actuatable microstructures.

11. The apparatus of claim 10 , wherein the microstructures comprise passively actuatable microstructures.

12. The apparatus of claim 1 , wherein the sealed channels are substantially parallel to one another.

13. The apparatus of claim 1 , wherein the elastomeric material comprises a first thickness adjacent a middle of each of the sealed channels and a second thickness adjacent edges of each of the sealed channels.

14. The apparatus of claim 13 , wherein the first thickness is less than the second thickness.

15. The apparatus of claim 1 , wherein the sheet includes a single layer having the sealed channels.

16. The apparatus of claim 1 , wherein cross-sections of the sealed channels change when the elastomeric material is in the deformed position.

17. The apparatus of claim 1 , wherein the channels define the microstructures.

18. The apparatus of claim 1 , wherein the channels are void of other structures to enable the elastomeric material to be in the deformed position relative to the sealed channels to define microstructures in response to the pressure differential across the elastomeric material.

19. An apparatus, comprising:
a sheet comprising a first side comprising an elastomeric material and a second side opposite the first side, the sheet defining hermetically sealed channels, in response to a pressure differential across the elastomeric material, the elastomeric material to be in a deformed position relative to the sealed channels to define microstructures based on the inclusion of gas within the sealed channels.

20. A method, comprising:
exposing a sheet to a pressure differential, the sheet including a single layer defining sealed channels; and
enabling the sealed channels to define microstructures in response to the pressure differential based on the inclusion of gas within the sealed channels.

21. The method of claim 20 , wherein the sheet includes a first side comprising an elastomeric material and a second side opposite the first side.

22. The method of claim 21 , wherein, in response to the pressure differential across the elastomeric material, further comprising enabling the elastomeric material to move to a deformed position to define microstructures.

23. The method of claim 20 , wherein prior to exposing the sheet to the pressure differential, further comprising adhering the sheet to a vehicle.

24. The method of claim 23 , wherein the vehicle is an airplane.

Assignees

• Boeing Co

Inventors

• Song Weidong

Classifications

• F15D1/006

  comprising moving surfaces, wherein the surface, or at least a portion thereof is moved or deformed by the fluid flow · CPC title

• F15D1/0085 Primary

  Methods of making characteristic surfaces for influencing the boundary layer · CPC title

• F15D1/004

  oriented essentially parallel to the direction of flow · CPC title

• B64C21/10

  using other surface properties, e.g. roughness · CPC title

• B63B1/34

  by reducing surface friction · CPC title