MEMS flow module with piston-type pressure regulating structure

• US 20060206049A1
• Filed: 03/14/2005
• Published: 09/14/2006
• Est. Priority Date: 03/14/2005
• Status: Abandoned Application

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: Sniegowski, Jeffry J., Rodgers, M. Steven
• Application Number:
  US11/080,075
• Publication Number:
  US 20060206049A1
• Time in Patent Office: Days
• US Class Current: 604/8
• CPC Class Codes: A61F 9/00781 Apparatus for modifying intraocular pressure, e.g. for glaucoma treatment drainage implants in general A61M27/002
• CPC Class Codes: A61M 2205/0244 Micromachined materials, e.g. made from silicon wafers, microelectromechanical systems [MEMS] or comprising nanotechnology
• CPC Class Codes: A61M 2205/04 implanted
• CPC Class Codes: A61M 39/24 Check- or non-return valves
• CPC Class Codes: A61M 5/16813 by controlling the degree of opening of the flow line
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites

Abstract

Various embodiments of MEMS flow modules that regulate flow or pressure by the axial movement of a flow regulating or controlling structure are disclosed. One such MEMS flow module (40) has a regulator (66) that is aligned with and spaced from a first flow port (52) through a first plate (50). The regulator (66) is structurally interconnected with a flexible third plate (80). When the regulator (66) experiences at least a certain differential pressure, the regulator (66) moves at least generally axially away from the first plate (50) by a flexing of the third plate (80) at least generally away from the first plate (50). Increasing the spacing between the regulator (66) and the first plate (50) accommodates an increased flow or flow rate through the MEMS flow module (40).

Claims

1. A MEMS flow module, comprising:

a first plate comprising a first flow port;

a second plate comprising a second flow port;

a regulator disposable within said second flow port, wherein said regulator fluidly communicates with said first flow port, wherein said second plate and said regulator are disposed in a substantially common plane in the absence of at least a certain differential pressure across said MEMS flow module, and wherein said regulator is moveable relative to each of said first and second plates to change a magnitude of a spacing of said regulator from said first plate in response to at least a certain change in a differential pressure across said MEMS flow module.

2. A MEMS flow module, as claimed in claim 1, wherein said regulator moves at least generally axially in response to at least a certain change in a differential pressure across said MEMS flow module.

3. A MEMS flow module, as claimed in claim 1, wherein said second plate and said regulator exist in a common fabrication level.

4. A MEMS flow module, as claimed in claim 3, wherein said regulator and said second plate are free of any interconnection in said common fabrication level.

5. A MEMS flow module, as claimed in claim 1, wherein said regulator has a larger diameter than said first flow port, and wherein a center of said regulator is axially aligned with a center of said first flow port.

6. A MEMS flow module, as claimed in claim 1, wherein an outside perimeter of said regulator and a sidewall of said second plate that defines said second flow port are separated by an annular gap.

7. A MEMS flow module, as claimed in claim 1, further comprising:

a first annular wall that interconnects said first plate and said second plate, wherein said first and second flow ports are located inwardly of said first annular wall in a lateral dimension.

8. A MEMS flow module, as claimed in claim 7, further comprising:

a third plate spaced from said second plate, wherein said second plate is located between said first plate and said third plate, wherein said MEMS flow module further comprises a second annular wall that interconnects said third plate and said second plate, and wherein said first and second flow ports and said regulator are also located inwardly of said second annular wall in said lateral dimension.

9. A MEMS flow module, as claimed in claim 8, wherein said third plate further comprises at least one third flow port disposed within a region defined by said second annular wall.

10. A MEMS flow module, as claimed in claim 1, further comprising:

a third plate, wherein said second plate is located between said first and third plates, wherein said third plate is interconnected with and spaced from said regulator, and wherein said third plate comprises at least one third flow port.

11. A MEMS flow module, as claimed in claim 10, wherein said third plate is in the form of a diaphragm that is flexible to allow said regulator to move away from said first plate in response to at least a certain change in a differential pressure across said MEMS flow module.

12. A MEMS flow module, as claimed in claim 10, wherein, said third plate comprises a plurality of flexible support members that are interconnected with said regulator and that flex to allow said regulator to move away from said first plate in response to at least a certain change in a differential pressure across said MEMS flow module.

13. A MEMS flow module, as claimed in claim 12, wherein said plurality of support members each extend along a radii emanating from a common point.

14. A MEMS flow module, as claimed in claim 1, wherein centers of said first flow port and said second flow port are axially aligned.

15. A MEMS flow module, as claimed in claim 1, wherein movement of said regulator away from said first plate in response to at least a certain increase in a differential pressure across said MEMS flow module accommodates an increased flow through said MEMS flow module.

16. A MEMS flow module, as claimed in claim 1, wherein said MEMS flow module further comprises at least one flow-restricting structure located within a space between said regulator and said first plate, wherein all flow through said first flow port must pass through a space defined in part by said flow-restricting structure.

17. A MEMS flow module, as claimed in claim 16, wherein said flow-restricting structure extends from said first plate toward said regulator, and terminates prior to reaching said regulator.

18. A MEMS flow module, as claimed in claim 1, wherein said first plate comprises a plurality of said first flow ports, and wherein said second plate further comprises a plurality of said second flow ports and said regulators, wherein each said first flow port has a corresponding second flow port and a corresponding said regulator.

19. A MEMS flow module, as claimed in claim 1, wherein said MEMS flow module is a passive device.

20. An implant for addressing pressure within a first body region, comprising said MEMS flow module of claim 1 and a conduit, wherein said conduit comprises a flow path that is adapted to fluidly interconnect with the first body region, and wherein said MEMS flow module is disposed in said flow path.

21. An implant, as claimed in claim 20, further comprising at least one housing, wherein said at least one housing is disposed within said conduit, and wherein said MEMS flow module interfaces with said at least one housing.

22. An implant installable in a human eye and comprising said MEMS flow module of claim 1 and a conduit, wherein said conduit comprises a flow path that is adapted to fluidly interconnect with an anterior chamber of the human eye when said implant is installed, and wherein said MEMS flow module is disposed in said flow path.

23. A MEMS flow module, comprising:

a first fabrication level comprising a first plate, wherein said first plate comprises a first flow port;

a second fabrication level comprising a second plate, a second flow port associated with said second plate, and a regulator, wherein said regulator fluidly communicates with said first flow port, and wherein said regulator is moveable relative to said first and second plates to change a magnitude of a spacing of said regulator from said first plate in response to at least a certain change in a differential pressure across said MEMS flow module.

24. A MEMS flow module, as claimed in claim 23, wherein said regulator is movable at least generally axially in response to at least a certain change in a differential pressure across said MEMS flow module.

25. A MEMS flow module, as claimed in claim 23, wherein said regulator is disposed within said second flow port in the absence of at least a certain differential pressure across said MEMS flow module.

26. A MEMS flow module, as claimed in claim 23, further comprising:

a first annular wall that interconnects said first and second plates, wherein said first and second flow ports are located inwardly of said first annular wall in a lateral dimension.

27. A MEMS flow module, as claimed in claim 23, wherein said second plate and said regulator are disposed in a substantially common plane in the absence of at least a certain differential pressure across said MEMS flow module.

28. A MEMS flow module, as claimed in claim 23, wherein an outside perimeter of said regulator and a sidewall of said second plate that defines said second flow port are separated by an annular gap when said regulator is disposed within said second flow port.

29. A MEMS flow module, as claimed in claim 23, wherein said second plate comprises an annular support, and wherein said MEMS flow module further comprises a plurality of flexible support members that movably interconnect said annular support and said regulator, wherein said plurality of flexible support members also exist in said second fabrication level.

30. A MEMS flow module, as claimed in claim 23, further comprising:

a third fabrication level, wherein said second fabrication level is located between said first and third fabrication levels, wherein said third fabrication level comprises a third plate that compliantly supports said regulator relative to use said first and second plates, and wherein said third plate comprises a third flow port.

31. A MEMS flow module, as claimed in claim 30, wherein said third plate is in the form of a diaphragm that is flexible to allow said regulator to move away from said first plate in response to at least a certain change in a differential pressure across said MEMS flow module.

32. A MEMS flow module, as claimed in claim 30, wherein said third plate comprises a plurality of flexible support members that are interconnected with said regulator and that flex to allow said regulator to move generally away from said first plate in response to at least a certain change in a differential pressure across said MEMS flow module.

33. A MEMS flow module, as claimed in claim 23, wherein said MEMS flow module further comprises at least one flow-restricting structure located within a space between said regulator and said first plate, wherein all flow through said first flow port must pass through a space defined in part by said flow-restricting structure.

34. A MEMS flow module, as claimed in claim 33, wherein said flow-restricting structure extends from said first plate toward said regulator, and terminates prior to reaching said regulator.

35. An implant for addressing pressure within a first body region, comprising said MEMS flow module of claim 23 and a conduit, wherein said conduit comprises a flow path that is adapted to fluidly interconnect with the first body region, and wherein said MEMS flow module is disposed in said flow path.

36. An implant, as claimed in claim 35, further comprising at least one housing, wherein said at least one housing is disposed within said conduit, and wherein said MEMS flow module interfaces with said at least one housing.

37. An implant installable in a human eye and comprising said MEMS flow module of claim 23 and a conduit, wherein said conduit comprises a flow path that is adapted to fluidly interconnect with an anterior chamber of the human eye when said implant is installed, and wherein said MEMS flow module is disposed in said flow path.

38. A MEMS flow module, comprising:

a first plate comprising a first flow port;

a second plate comprising a second flow port; and

a regulator to fluidly communicates with said first flow port, wherein an outside perimeter of said regulator and a sidewall of said second plate that defines said second flow port are separated by an annular gap when said regulator is disposed within said second flow port, and wherein said regulator is moveable relative to said first and second plates to change a magnitude of a spacing of said regulator from said first plate in response to at least a certain change in a differential pressure across said MEMS flow module.

39. A MEMS flow module, as claimed in claim 38, wherein said regulator moves at least generally axially in response to at least a certain change in a differential pressure across said MEMS flow module.

40. A MEMS flow module, as claimed in claim 38, further comprising:

a first annular wall that interconnects said first and second plates, wherein said first and second flow ports are located inwardly of said first annular wall in a lateral dimension.

41. A MEMS flow module, as claimed in claim 38, wherein said second plate and said regulator are disposed in a substantially common plane in the absence of at least a certain differential pressure across said MEMS flow module.

42. A MEMS flow module, as claimed in claim 38, wherein said second plate and said regulator are fabricated in a common fabrication level.

43. A MEMS flow module, as claimed in claim 42, wherein said regulator and said second plate are free of interconnections in said common fabrication level.

44. A MEMS flow module, as claimed in claim 38, further comprising:

a compliant support structure spaced from said second plate and such that said second plate is between said compliant support and said first plate, wherein said complaint support structure supports said regulator relative to said first and second plates.

45. A MEMS flow module, as claimed in claim 44, wherein said compliant support structure permits said regulator to move at least generally axially in response to at least a certain change in a differential pressure across said MEMS flow module.

46. An implant for addressing pressure within a first body region, comprising said MEMS flow module of claim 38 and a conduit, wherein said conduit comprises a flow path that is adapted to fluidly interconnect with the first body region, and wherein said MEMS flow module is disposed in said flow path.

47. An implant, as claimed in claim 46, further comprising at least one housing, wherein said at least one housing is disposed within said conduit, and wherein said MEMS flow module interfaces with said at least one housing.

48. An implant installable in a human eye and comprising said MEMS flow module of claim 38 and a conduit, wherein said conduit comprises a flow path that is adapted to fluidly interconnect with an anterior chamber of the human eye when said implant is installed, and wherein said MEMS flow module is disposed in said flow path.

49. A MEMS flow module, comprising:

a first plate comprising a first flow port;

a second plate comprising a second flow port;

a regulator that fluidly communicates with said first flow port; and

a third plate comprising a third flow port, wherein said regulator is located between said first plate and said third plate, and wherein at least a portion of said third plate compliantly supports said regulator to allow said regulator to move at least generally axially away from said first plate in response to at least a certain change in a differential pressure across said MEMS flow module to accommodate an increased flow through said MEMS flow module in a direction that proceeds through said first port, then through said second flow port, and then through said third flow port.

50. An implant installable in a human eye and comprising said MEMS flow module of claim 49 and a conduit, wherein said conduit comprises a flow path that is adapted to fluidly interconnect with an anterior chamber of the human eye when said implant is installed, and wherein said MEMS flow module is disposed in said flow path.

51. An implant, as claimed in claim 50, further comprising at least one housing, wherein said at least one housing is disposed within said conduit, and wherein said MEMS flow module interfaces with said at least one housing.

52. A MEMS flow module, comprising:

a plate comprising a flow port;

a regulator disposable within said flow port, wherein said regulator is moveable relative to said plate in response to at least a certain change in a differential pressure across said MEMS flow module.

53. A MEMS flow module, as claimed in claim 52, wherein said regulator moves at least generally axially in response to at least a certain change in a differential pressure across said MEMS flow module.

54. A MEMS flow module, as claimed in claim 52, wherein said plate and said regulator exist in a common fabrication level.

55. A MEMS flow module, as claimed in claim 54, wherein said regulator and said second plate are free of any interconnection in said common fabrication level.

56. A MEMS flow module, as claimed in claim 52, wherein an outside perimeter of said regulator and a sidewall of said plate that defines said flow port are separated by an annular gap when said regulator is disposed within said flow port.

57. A MEMS flow module, as claimed in claim 52, wherein movement of said regulator in response to experiencing at least a certain a differential pressure accommodates an increased flow through said MEMS flow module.

58. An implant for addressing pressure within a first body region, comprising said MEMS flow module of claim 52 and a conduit, wherein said conduit comprises a flow path that is adapted to fluidly interconnect with the first body region, and wherein said MEMS flow module is disposed in said flow path.

59. An implant, as claimed in claim 58, further comprising at least one housing, wherein said at least one housing is disposed within said conduit, and wherein said MEMS flow module interfaces with said at least one housing.

60. An implant installable in a human eye and comprising said MEMS flow module of claim 52 and a conduit, wherein said conduit comprises a flow path that is adapted to fluidly interconnect with an anterior chamber of the human eye when said implant is installed, and wherein said MEMS flow module is disposed in said flow path.