Fluid flow control system incorporating a disposable pump cartridge

• US 5,746,719 A
• Filed: 10/25/1996
• Issued: 05/05/1998
• Est. Priority Date: 10/25/1996
• Status: Expired due to Fees

• Current Assignee: Tiax, LLC
• Original Assignee: Arthur D. Little, Inc.
• Inventors: Farra, Robert, Forni, Ronald J.
• Primary Examiner(s): Rimell, Sam
• Assistant Examiner(s): Yeh, Luke
• Application Number:
  US08/736,879
• Time in Patent Office: 557 Days
• Field of Search: 604/151, 604/131, 604/153, 604/65, 604/118, 604/119, 128/DIG. 12, 418/56
• US Class Current: 604/151
• CPC Class Codes: A61M 1/72 Cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 1/74 Suction control underwater drainage A61M1/61
• CPC Class Codes: A61M 1/77 Suction-irrigation systems aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463
• CPC Class Codes: A61M 1/80 Suction pumps A61M1/64, A61M1/71, A61M60/00 take precedence
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/3351 Controlling upstream pump pressure
• CPC Class Codes: A61M 2205/6045 having complementary physical shapes for indexing or registration purposes
• CPC Class Codes: A61M 3/0201 Cassettes therefor
• CPC Class Codes: Y10S 128/12 Pressure infusion

Abstract

A fluid flow control system includes a disposable cartridge which is receivable in a shifting carrier body portion of a control module. The disposable cartridge houses a disposable pump and a pressure transducer element which are fluidly interconnected by an internal fluid flow circuit formed in part by an elastomeric separating sheet within the cartridge. Following loading of the cartridge, shifting of the carrier body portion automatically results in a drive connection to the pump, the positioning of various flow control valves within the cartridge and the seating of the pressure transducer element to the control module. External flow lines are readily placed in fluid communication with the internal fluid flow circuit through exterior connection ports provided on the cartridge.

Claims

1. A fluid flow control system comprising:

a disposable cartridge including;

a cartridge housing formed from at least two housing sections which are joined together, said housing sections being provided with at least two fluid connection ports and an opening exposing an interior of said cartridge housing;

a pump having associated inlet and outlet ports and at least one movable pump element provided with an attachment member adapted to be interconnected with a drive element for operating said pump, said pump being positioned within said cartridge housing with said attachment member being located at said opening; and

a separating member positioned within said cartridge housing, said separating member defining, at least in part, a plurality of flow passages respectively fluidly interconnected to said at least two fluid connection ports and the inlet and outlet ports of said pump; and

a control module including;

a control housing having a main body portion and a carrier body portion, said carrier body portion defining a cartridge receiving area that is adapted to receive said disposable cartridge;

a drive unit including a drive element adapted to be drivingly connected to the attachment member of said pump following insertion of the disposable cartridge in said cartridge receiving area; and

means for controlling the operation of said drive unit in order to regulate an operation of said pump.

2. The fluid flow control system according to claim 1, wherein said separating member is constituted by a flexible sheet.

3. The fluid flow control system according to claim 2, wherein said flexible sheet is formed from an elastomeric material.

4. The fluid flow control system according to claim 1, wherein one of said at least two housing sections is formed with a plurality of open channels which are covered by said separating member to define said plurality of flow passages.

5. The fluid flow control system according to claim 4, wherein said separating member is formed with various raised walls which are sealingly mated about said open channels.

6. The fluid flow control system according to claim 1, further comprising a pressure transducer including a disposable transducer element located in said cartridge housing and a re-usable transducer element provided in said control housing, said disposable transducer element being juxtaposed said re-usable transducer element following insertion of the disposable cartridge in said cartridge receiving area.

7. The fluid flow control system according to claim 6, wherein said disposable transducer element includes a fluid inlet that is in fluid communication with at least one of said plurality of flow passages through said separating member.

8. The fluid flow control system according to claim 1, wherein one of said plurality of flow passages interconnects said at least two fluid connection ports to provide for a flow of fluid through said disposable cartridge that is independent of the operation of said pump.

9. The fluid flow control system according to claim 1, wherein said pump constitutes a plastic scroll fluid device.

10. The fluid flow control system according to claim 1, further comprising a plurality of spaced apertures formed in said cartridge housing and a plurality of valve members shiftably mounted on said control housing, each of said valve members being adapted to extend into a respective one of said spaced apertures and to obstruct a flow through a predetermined section of said flow passages.

11. The fluid flow control system according to claim 10, wherein said valve members constitute linear solenoid valve units.

12. The fluid flow control system according to claim 10, wherein said separating member is made from an elastomeric material and each of said valve members is adapted to cause a respective portion of the elastomeric material to project into a predetermined section of the flow passages to thereby obstruct a flow within the flow passages.

13. The fluid flow control system according to claim 1, further comprising a mechanism for shifting said carrier body portion of said control housing between a cartridge loading/unloading position wherein said carrier body portion is spaced from said main body portion and an in-use position wherein said carrier body portion is shifted towards said main body portion.

14. The fluid flow control system according to claim 13, further comprising a plurality of rail members connected to said carrier body portion and slidably received in said main body portion of said control housing, said rail members guiding said carrier body portion for movement between said loading/unloading and in-use positions.

15. The fluid flow control system according to claim 1, wherein said cartridge housing includes a front wall provided with suspension elements adapted to support a reservoir unit, one of said at least two fluid connection ports enabling the reservoir unit to be fluidly connected to said flow passages.

16. A disposable cartridge for use in a fluid flow control system comprising:

a cartridge housing formed from at least two housing sections which are joined together, said housing sections being provided with at least two fluid connection ports and an opening exposing an interior of said cartridge housing;

a pump having associated inlet and outlet ports and at least one movable pump element provided with an attachment member adapted to be interconnected with a drive element for operating said pump, said pump being positioned within said cartridge housing with said attachment member being located at said opening; and

a separating member positioned within said cartridge housing, said separating member defining, at least in part, a plurality of flow passages respectively fluidly interconnected to said at least two fluid connection ports and the inlet and outlet ports of said pump.

17. The disposable cartridge according to claim 16, wherein said separating member is constituted by a flexible sheet.

18. The disposable cartridge according to claim 17, wherein said flexible sheet is formed from an elastomeric material.

19. The disposable cartridge according to claim 16, wherein one of said at least two housing sections is formed with a plurality of open channels which are covered by said separating member to define said plurality of flow passages.

20. The disposable cartridge according to claim 19, wherein said separating member is formed with various raised walls which are sealingly mated about said open channels.

21. The disposable cartridge according to claim 16, further comprising a disposable pressure transducer element located in said cartridge housing.

22. The disposable cartridge according to claim 21, wherein said disposable transducer element includes a fluid inlet that is in fluid communication with at least one of said plurality of flow passages through said separating member.

23. The disposable cartridge according to claim 16, wherein one of said plurality of flow passages interconnects said at least two fluid connection ports to provide for a flow of fluid through said disposable cartridge that is independent of the operation of said pump.

24. The disposable cartridge according to claim 16, wherein said pump constitutes a plastic scroll fluid device.

25. The disposable cartridge according to claim 16, further comprising a plurality of spaced apertures formed in said cartridge housing, each of said spaced apertures being adapted to receive a respective valve member for obstructing a flow through a predetermined section of said flow passages.

26. The disposable cartridge according to claim 16, wherein said cartridge housing includes a front wall provided with suspension elements adapted to support a reservoir unit, one of said at least two fluid connection ports enabling the reservoir unit to be fluidly connected to said flow passages.

27. A fluid flow control system comprising:

a disposable cartridge including;

a cartridge housing formed from at least two housing sections which are joined together, said housing sections being provided with at least two fluid connection ports, an internal fluid flow passage circuit fluidly connected to the connection ports and an opening exposing an interior of said cartridge housing; and

a miniature scroll fluid device formed of plastic, said scroll fluid device having associated inlet and outlet ports in fluid communication with said internal fluid flow passage circuit and at least one movable work element provided with an attachment member adapted to be interconnected with a drive element for operating said scroll fluid device, said scroll fluid device being positioned within said cartridge housing with said attachment member being located at said opening; and

a control module including;

a control housing having a main body portion and a carrier body portion, said carrier body portion defining a cartridge receiving area that is adapted to receive said disposable cartridge;

a drive unit including a drive element adapted to be drivingly connected to the attachment member of said scroll fluid device following insertion of the disposable cartridge in said cartridge receiving area; and

means for controlling the operation of said drive unit in order to regulate an operation of said scroll fluid device.

28. The fluid flow control system according to claim 27, further comprising a separating member positioned within said cartridge housing, said separating member defining, at least in part, said internal fluid flow passage circuit.

29. The fluid flow control system according to claim 28, wherein said separating member comprises an elastomeric sheet.

30. The fluid flow control system according to claim 29, wherein one of said at least two housing sections is formed with a plurality of open channels which are covered by said separating member to define said internal fluid flow passage circuit.

31. The fluid flow control system according to claim 27, further comprising a plurality of spaced apertures formed in said cartridge housing and a plurality of valve members shiftably mounted on said control housing, each of said valve members being adapted to extend into a respective one of said spaced apertures and to selectively obstruct a flow through a predetermined section of said internal fluid flow passage circuit.

32. The fluid flow control system according to claim 27, wherein said internal fluid flow passage circuit interconnects said at least two fluid connection ports to provide for a flow of fluid through said disposable cartridge that is independent of the operation of said scroll fluid device.

33. The fluid flow control system according to claim 27, further comprising a pressure transducer including a disposable transducer element located in the cartridge housing in fluid communication with said internal fluid flow passage circuit and a re-usable transducer element provided in said control housing, said disposable transducer element being juxtaposed said re-usable transducer element following insertion of the disposable cartridge in said cartridge receiving area.

34. The fluid flow control system according to claim 27, further comprising a mechanism for shifting said carrier body portion of said control housing between a cartridge loading/unloading position wherein said carrier body is spaced from said main body portion and an in-use position wherein said carrier body portion is shifted towards said main body portion.

35. The fluid flow control system according to claim 27, wherein said cartridge housing includes a front wall provided with suspension elements adapted to support a reservoir unit, one of said at least two fluid connection ports enabling the reservoir unit to be fluidly connected to said internal fluid flow passage circuit.

36. A disposable cartridge for use in a fluid flow control system comprising:

a cartridge housing formed from at least two housing sections which are joined together, said housing sections being provided with at least two fluid connection ports, an internal fluid flow passage circuit fluidly connected to the connection ports and an opening exposing an interior of said cartridge housing; and

a miniature scroll fluid device formed of plastic, said scroll fluid device having associated inlet and outlet ports in fluid communication with said internal fluid flow passage circuit and at least one movable work element provided with an attachment member adapted to be interconnected with a drive element for operating said scroll fluid device, said scroll fluid device being positioned within said cartridge housing with said attachment member being located at said opening.

37. The disposable cartridge according to claim 36, further comprising a separating member positioned within said cartridge housing, said separating member defining, at least in part, said internal fluid flow passage circuit.

38. The disposable cartridge according to claim 37, wherein said separating member comprises an elastomeric sheet.

39. The disposable cartridge according to claim 38, wherein one of said at least two housing sections is formed with a plurality of open channels which are covered by said separating member to define said internal fluid flow passage circuit.

40. The disposable cartridge according to claim 36, further comprising a plurality of spaced apertures formed in said cartridge housing and a plurality of valve members shiftably mounted on said control housing, each of said valve members being adapted to extend into a respective one of said spaced apertures and to selectively obstruct a flow through a predetermined section of said internal fluid flow passage circuit.

41. The disposable cartridge according to claim 36, wherein said internal fluid flow passage circuit interconnects said at least two fluid connection ports to provide for a flow of fluid through said disposable cartridge that is independent of the operation of said scroll fluid device.

42. The disposable cartridge according to claim 36, further comprising a disposable transducer element located in said cartridge housing in fluid communication with said internal fluid flow passage circuit.

43. The disposable cartridge according to claim 36, wherein said cartridge housing includes a front wall provided with suspension elements adapted to support a reservoir unit, one of said at least two fluid connection ports enabling the reservoir unit to be fluidly connected to said internal fluid flow passage circuit.

44. A method of establishing a fluid flow control system comprising:

inserting a cartridge, containing a pump and defining a plurality of fluid flow passages therein, into a carrier body portion of a control module; and

shifting the carrier body portion towards a main body portion of the control module to enable a driveshaft, supported by the main body portion, to be drivingly connected to the pump.

45. The method according to claim 44, further comprising:

linearly extending a valve member, supported by the main body portion of the control module, within the cartridge to a fluid flow controlling position with respect to one of said fluid flow passages.

46. The method according to claim 44, further comprising:

sensing a fluid pressure within the fluid flow control system; and

selectively setting an operational mode for the fluid flow system such that said pump is driven based on one of a desired fluid flow rate and a desired system pressure.