High throughput fabrication of soft machines

Patent metadata

Field	Value
Publication number	US-10006444-B2
Application number	US-201514685456-A
Country	US
Kind code	B2
Filing date	Apr 13, 2015
Priority date	Apr 11, 2014
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A soft robot device includes at least a first thermoplastic layer and a second thermoplastic layer, wherein at least one layer is comprised of an extensible thermoplastic material; at least one layer is an inextensible layer; and at least one layer comprises a pneumatic network, wherein the pneumatic network is configured to be in fluidic contact with a pressurizing source, wherein the first and second thermoplastic layers are thermally bonded to each other.

First claim

What is claimed is:

1. A soft robot device comprising:
at least a first thermoplastic layer and a second thermoplastic layer, wherein:
at least one layer is comprised of an extensible thermoplastic, elastomeric material;
at least one layer is an inextensible layer; and
at least one layer comprises a pneumatic network, wherein the pneumatic network is configured to be in fluidic contact with a pressurizing source,
wherein the first and second thermoplastic layers are thermally bonded to each other.

2. The soft robot device according to claim 1 , wherein the inextensible layer houses the pneumatic network.

3. The soft robot device according to claim 2 , wherein
the first layer is the extensible layer,
the second layer is the inextensible layer, and
the first layer is thinner than the second layer.

4. The soft robot device according to claim 1 , wherein the first layer is the extensible layer and the first layer houses the pneumatic network and the second layer is the inextensible layer.

5. The soft robot device according to claim 4 , wherein the second layer is comprised of a stiffer thermoplastic material.

6. The soft robot device according to claim 4 , wherein the second layer comprises an inelastic fabric, web or mesh bonded to or embedded in the thermoplastic layer.

7. The soft robot device of claim 1 , wherein the first and second thermoplastic layers are directly bonded to one another.

8. The soft robot device of claim 1 , wherein the first and second thermoplastic layers are bonded to one another through one or more intervening layers.

9. The soft robot device of claim 1 , wherein the pneumatic network is a hot embossed pneumatic network.

10. The soft robot device of claim 1 , wherein the pneumatic network is cut from the layer to form channels and chambers.

11. The soft robot device according to claim 1 , wherein the device further comprises a third thermoplastic layer, wherein:
the first thermoplastic layer comprises the extensible layer,
the second thermoplastic layer comprises the inextensible layer, and
the third thermoplastic layer is disposed between the first and second thermoplastic layers and houses the pneumatic network.

12. The soft robot device according to claim 11 , wherein the inextensible layer comprises an inelastic fabric, web or mesh bonded to or embedded in the second thermoplastic layer.

13. The soft robot device according to claim 11 , wherein extensible layer comprises an elastic fabric, web or mesh bonded to or embedded in the first thermoplastic layer.

14. The soft robot device according to claim 11 , wherein the third thermoplastic layer is comprised of two or more sublayers, which in combination form the pneumatic device.

15. The soft robot device of claim 1 , wherein the thermoelastic material comprises a thermoplastic polyurethane.

16. A method of actuating a soft robot device, comprising:
providing a soft robot device according to claim 1 ; and
pressurizing the pneumatic network to cause the extensible layer to expand and soft device to move from a first resting position to a second actuated position.

17. A method of making a soft robot device comprising:
providing a first thermoplastic layer and a second thermoplastic layer; and
applying heat and/or pressure to the first and second thermoplastic layers to thermally bond the layers, wherein:
at least one layer is comprised of an extensible, elastomeric thermoplastic material;
at least one layer is an inextensible layer; and
at least one layer comprises a pneumatic network, wherein the pneumatic network is configured to be in fluidic contact with a pressurizing source.

18. The method according to claim 17 , wherein the inextensible layer houses the pneumatic network.

19. The method according to claim 18 , wherein
the first layer is the extensible layer,
the second layer is the inextensible layer, and
the first layer is thinner than the second layer.

20. The method according to claim 17 , wherein the first layer is the extensible layer and the first layer houses the pneumatic network and the second layer is the inextensible layer.

21. The method according to claim 20 , wherein the second layer is comprised of a stiffer thermoplastic material.

22. The method according to claim 20 , wherein the second layer comprises an inelastic fabric, web or mesh bonded to or embedded in the thermoplastic layer.

23. The method according to claim 17 , wherein the first and second thermoplastic layers are directly bonded to one another.

24. The method according to claim 17 , wherein the first and second thermoplastic layers are bonded to one another through one or more intervening layers.

25. The method according to claim 17 , further comprising hot embossing the pneumatic network into the thermoplastic layer.

26. The method according to claim 17 , further comprising cutting the thermoplastic layer to form channels and chambers of the pneumatic network.

27. The method according to claim 17 , further comprising providing a third thermoplastic layer and disposing the third thermoplastic layer between the first and second thermoplastic layers, wherein:
the first thermoplastic layer comprises the extensible layer,
the second thermoplastic layer comprises the inextensible layer, and
the third thermoplastic layer houses the pneumatic network.

28. The method according to claim 27 , wherein the inextensible layer comprises an inelastic fabric, web or mesh bonded to or embedded in the second thermoplastic layer.

29. The method according to claim 27 , wherein the extensible layer comprises an elastic fabric, web or mesh bonded to or embedded in the first thermoplastic layer.

30. The method of claim 17 , wherein the thermoelastic material comprises a thermoplastic polyurethane.

Assignees

• Harvard College

Inventors

• Ting Jason Ming
• Tayi Alok Suryavamsee
• Mosadegh Bobak
• Whitesides George M

Classifications

• B32B2307/51

  Elastic · CPC title

• B29C66/71

  characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125) · CPC title

• Y10T428/24331

  including nonapertured component · CPC title

• B29C66/73921

  characterised by the materials of both parts being thermoplastics · CPC title

• B29C66/712

  the composition of one of the parts to be joined being different from the composition of the other part · CPC title