Magnetic membrane system

• US 20040265150A1
• Filed: 05/28/2004
• Published: 12/30/2004
• Est. Priority Date: 05/30/2003
• Status: Abandoned Application

• Current Assignee: Lawrence Livermore National Security LLC (Government of the United States of America)
• Original Assignee: Regents of the University of California (University of California)
• Inventors: McElfresh, Michael W., Lucas, Matthew S.
• Application Number:
  US10/857,571
• Publication Number:
  US 20040265150A1
• Time in Patent Office: Days
• US Class Current: 417/413.1
• CPC Class Codes: B81B 3/0035 Constitution or structural means for controlling the movement of the flexible or deformable elements
• CPC Class Codes: F04B 43/0054 particularities of the flexible members
• CPC Class Codes: F04B 43/043 Micropumps
• CPC Class Codes: Y10T 137/7381 Quick acting

Abstract

The present invention provides a membrane with magnetic particles. In one embodiment the membrane is created by mixing particles in a non-magnetic base. The membrane may act as an actuator, a sensor, a pump, a valve, or other device. A magnet is operatively connected to the membrane. The magnet acts on and changes the shape of the membrane.

Claims

1. An apparatus, comprising:

a membrane,

said membrane made of a nonmagnetic material body and

magnetic pieces, said magnetic pieces contained in said nonmagnetic material body,

a magnet operatively connected to said membrane, and

means for causing said magnet to act on and change the shape of said membrane.

2. The apparatus of claim 1 wherein said magnet is a permanent magnet.

3. The apparatus of claim 1 wherein said magnet is an electro magnet.

4. The apparatus of claim 1 wherein said nonmagnetic material body comprises a polymer material.

5. The apparatus of claim 1 wherein said nonmagnetic material body comprises a polymeric material.

6. The apparatus of claim 1 wherein said magnetic pieces comprise individual magnetic particles.

7. The apparatus of claim 1 wherein said magnetic pieces are magnetic particles embedded in said nonmagnetic material body.

8. The apparatus of claim 1 wherein said magnetic pieces are magnetic particles dispersed uniformly in said nonmagnetic material body.

9. The apparatus of claim 1 wherein said magnetic pieces are magnetic particles in a specific concentration profile in said nonmagnetic material body.

10. The apparatus of claim 1 wherein said magnetic pieces comprise a Fe—

Pt alloy.

11. The apparatus of claim 1 wherein said magnetic pieces comprise a Ni—

Pd alloy.

12. The apparatus of claim 1 wherein said magnetic pieces comprise a Ni—

Zn—

Fe—

O magnetic powder.

13. The apparatus of claim 1 wherein said magnetic pieces comprise a Bad-Co—

Fe—

O magnetic powder.

14. The apparatus of claim 1 wherein said magnetic pieces comprise a Fe—

O magnetic powder.

15. The apparatus of claim 1 wherein said magnetic pieces comprise a substituted magnetite or ferric oxide crystalline lattice with a portion of the iron atoms substituted by one of the following, cobalt, nickel, manganese, zinc, magnesium, copper, chromium, cadmium, or gallium.

16. The apparatus of claim 1 wherein said magnetic pieces comprise a Palladium Cobalt alloy.

17. The apparatus of claim 1 wherein said magnetic pieces comprise a Palladium Cobalt alloy that has a controllable curie temperature in the range of 40-100 degrees Celsius.

18. The apparatus of claim 1 wherein said magnetic pieces comprise a Nickel Zinc Ferrite material.

19. The apparatus of claim 1 wherein said magnetic pieces comprise particles having a size range of 1 nm to 500 microns.

20. The apparatus of claim 1 including a magnetic field sensor operatively connected to said membrane.

21. The apparatus of claim 1 including a tubular magnetic field sensor operatively connected to said membrane.

22. The apparatus of claim 1 including a pump body operatively connected to said membrane and valve means connected to said pump body for controlling flow.

23. The apparatus of claim 1 including a pump body operatively connected to said membrane, a one way intake valve connected to said pump body, and a one way output valve connected to said pump body.

24. The apparatus of claim 1 where said apparatus serves as a valve to open or close a conduit with an opening with said membrane positioned to move between a position closing said opening and a position where said opening is not closed.

26. The apparatus of claim 1 wherein said magnet means is a permanent magnet.

27. The apparatus of claim 1 wherein said magnet means is an electro magnet.

28. The apparatus of claim 1 wherein said nonmagnetic material body comprises a polymer material.

29. The apparatus of claim 1 wherein said nonmagnetic material body comprises a polymeric material.

30. The apparatus of claim 1 wherein said magnetic pieces comprise individual magnetic particles.

31. The apparatus of claim 1 wherein said magnetic pieces are magnetic particles embedded in said nonmagnetic material body.

32. The apparatus of claim 1 wherein said magnetic pieces are magnetic particles dispersed uniformly in said nonmagnetic material body.

33. The apparatus of claim 1 wherein said magnetic pieces are magnetic particles in a specific concentration profile in said nonmagnetic material body.

34. The apparatus of claim 1 wherein said magnetic pieces comprise a Fe—

Pt alloy.

35. The apparatus of claim 1 wherein said magnetic pieces comprise a Ni—

Pd alloy.

36. The apparatus of claim 1 wherein said magnetic pieces comprise a Ni—

Zn—

Fe—

O magnetic powder.

37. The apparatus of claim 1 wherein said magnetic pieces comprise a Bad-Co—

Fe—

O magnetic powder.

38. The apparatus of claim 1 wherein said magnetic pieces comprise a Fe—

O magnetic powder.

39. The apparatus of claim 1 wherein said magnetic pieces comprise a substituted magnetite or ferric oxide crystalline lattice with a portion of the iron atoms substituted by one of the following, cobalt, nickel, manganese, zinc, magnesium, copper, chromium, cadmium, or gallium.

40. The apparatus of claim 1 wherein said magnetic pieces comprise a Palladium Cobalt alloy.

41. The apparatus of claim 1 wherein said magnetic pieces comprise a Palladium Cobalt alloy that has a controllable curie temperature in the range of 40-100 degrees Celsius.

42. The apparatus of claim 1 wherein said magnetic pieces comprise a Nickel Zinc Ferrite material.

43. The apparatus of claim 1 wherein said magnetic pieces comprise particles having a size range of 1 nm to 500 microns.

44. The apparatus of claim 1 including a magnetic field sensor operatively connected to said membrane.

45. The apparatus of claim 1 including a tubular magnetic field sensor operatively connected to said membrane.

46. The apparatus of claim 1 including a pump body operatively connected to said membrane and valve means connected to said pump body for controlling flow.

47. The apparatus of claim 1 including a pump body operatively connected to said membrane, a one way intake valve connected to said pump body, and a one way output valve connected to said pump body.

48. The apparatus of claim 1 where said apparatus serves as a valve to open or close a conduit with an opening with said membrane positioned to move between a position closing said opening and a position where said opening is not closed.

25. An apparatus, comprising:

a membrane,

said membrane made of a nonmagnetic material body and

magnetic pieces, said magnetic pieces contained in said nonmagnetic material body, and

magnet means operatively connected to said membrane for causing said membrane to change shape.

49. A method of actuating a device to perform an activity on a subject, comprising the steps of:

providing a membrane having magnetic pieces in a nonmagnetic material body,

positioning said membrane in a desired position with regard to said subject, and

using a magnet to produce a magnetic field that acts on said magnetic pieces thereby actuating the device to perform the activity on the subject.

50. The method of claim 49 wherein said step of using a magnet comprises using a permanent magnet to produce a magnetic field that acts on said magnetic pieces thereby actuating the device to perform the activity on the subject.

51. The method of claim 49 wherein said step of using a magnet comprises using an electro magnet to produce a magnetic field that acts on said magnetic pieces thereby actuating the device to perform the activity on the subject.

52. The method of claim 49 wherein said step of providing a membrane comprises providing a membrane having magnetic pieces in a polymer material body.

53. The method of claim 49 wherein said step of providing a membrane comprises providing a membrane having magnetic pieces in a polymeric material body.

54. The method of claim 49 wherein said step of providing a membrane comprises providing a membrane having individual magnetic particles in a nonmagnetic material body.

55. The method of claim 49 wherein said step of providing a membrane comprises providing a membrane having magnetic particles embedded in a nonmagnetic material body.

56. The method of claim 49 wherein said step of providing a membrane comprises providing a membrane by dispersing magnetic particles uniformly in a nonmagnetic material body.

57. The method of claim 49 wherein said step of providing a membrane comprises providing a membrane by dispersing magnetic particles in a specific concentration profile in a nonmagnetic material body.

58. The method of claim 49 wherein said step of providing a membrane comprises providing a membrane having ferrite magnetic pieces in a polymer material body.

59. The method of claim 49 wherein said step of providing a membrane comprises providing a membrane having magnetic pieces made of an alloy in a polymer material body.

60. The method of claim 49 wherein said step of providing a membrane comprises providing a membrane having magnetic pieces in the form of a powder in a polymer material body.