Patency Check Compatible Check Valve And Fluid Delivery System Including The Patency Check Compatible Check Valve

• US 20080172006A1
• Filed: 01/15/2008
• Published: 07/17/2008
• Est. Priority Date: 01/15/2007
• Status: Abandoned Application

• Current Assignee: Medrad Incorporated (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Hicks, Jeffrey H.
• Application Number:
  US12/014,288
• Publication Number:
  US 20080172006A1
• Time in Patent Office: Days
• US Class Current: 604/249
• CPC Class Codes: A61M 2005/1588 having means for monitoring, controlling or visual inspection, e.g. for patency check, avoiding extravasation
• CPC Class Codes: A61M 2039/2473 Valve comprising a non-deformable, movable element, e.g. ball-valve, valve with movable stopper or reciprocating element
• CPC Class Codes: A61M 2039/2486 Guided stem, e.g. reciprocating stopper
• CPC Class Codes: A61M 39/223 Multiway valves
• CPC Class Codes: A61M 39/24 Check- or non-return valves
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons

Abstract

The check valve includes a housing body and a valve member. An actuator is associated with the valve member or housing body. The housing body defines a flow passage and an inlet port and an outlet port each communicating with the flow passage. The housing body includes a seal seat in the flow passage between the inlet port and outlet port. The valve member is disposed in the flow passage and is adapted to engage the seal seat. The actuator may be operatively connected to the valve member to place the valve member in an override position permitting bi-directional fluid flow through the flow passage. The valve member may be a cantilever valve member responsive to fluid flow in the flow passage. The valve member may have multiple states or positions. The actuator may be a bypass actuator selectively placing the inlet port in fluid communication with the outlet port.

Claims

1. A patency check compatible check valve, comprising:

a housing body defining a flow passage, an inlet port communicating with the flow passage, and an outlet port communicating with the flow passage, the housing body further comprising a seal seat in the flow passage between the inlet port and outlet port;

a valve member disposed in the flow passage and adapted to engage the seal seat, the valve member comprising a closed position wherein the valve member engages the seal seat and prevents fluid communication between the inlet port and outlet port and an open position permitting fluid flow from the inlet port to the outlet port in response to fluid flow in the inlet port; and

an actuator operatively connected to the valve member and adapted to place the valve member in an override position permitting bidirectional fluid flow through the flow passage.

2. A patency check compatible check as claimed in claim 1 wherein the valve member is fluid flow responsive to reverse fluid flow in the outlet port to engage the seal seat and attain the closed position

3. A patency check compatible check as claimed in claim 1 wherein the actuator comprises a lever coupled to the valve member and adapted to move the valve member to the override position.

4. A patency check compatible check valve as claimed in claim 3 wherein the lever comprises an eccentric cam coupled with the valve member such that actuation of the lever causes the eccentric cam to move the valve member to the override position.

5. A patency check compatible check valve as claimed in claim 1 wherein the valve member comprises a plunger with a seal portion adapted engage the seal seat and wherein the lever comprises an eccentric cam such that actuation of the lever causes the eccentric cam to move the valve member to the override position.

6. A patency check compatible check valve as claimed in claim 1 wherein the valve member comprises a disk member biased into engagement with the seal seat, and the actuator comprises a hand-actuated plunger coupled to the disk member such that actuation of the plunger overcomes the biasing force applied to the disk member to place the disk member in the override position.

7. A patency check compatible check valve as claimed in claim 6 wherein the disk member is biased into engagement with the seal seat by a biasing member.

8. A patency check compatible check valve as claimed in claim 7 wherein the biasing member comprises a spring.

9. A patency check compatible check valve as claimed in claim 1 wherein the valve member comprises a hollow member defining an internal flow passage in fluid communication with the flow passage of the housing body and at least one side port.

10. A patency check compatible check valve as claimed in claim 9 wherein fluid flow in the inlet port causes deformation of the hollow member to permit fluid communication between the inlet port and outlet port and place the hollow member in the open position.

11. A patency check compatible check valve as claimed in claim 10 wherein the deformation occurs along a longitudinal axis of the hollow member.

12. A patency check compatible check valve as claimed in claim 10 wherein the hollow member is resiliently deformable such that upon ceasing of fluid flow in the inlet port the hollow member resiliently returns to the closed position.

13. A patency check compatible check valve as claimed in claim 9 wherein the seal seat comprises an internal portion of the housing body.

14. A patency check compatible check valve as claimed in claim 9 wherein the actuator is coupled to the hollow member to move the hollow member axially in the flow passage of the housing body to the override position wherein the at least one side port is in fluid communication with the inlet port.

15. A patency check compatible check valve as claimed in claim 14 wherein the actuator comprises a plunger associated with an end of the hollow member such that actuation of the plunger imparts axial movement to the hollow member.

16. A patency check compatible check valve as claimed in claim 9 wherein the housing body comprises a plurality of inlet ports and the hollow member is associated with each inlet port to form the closed position therewith.

17. A patency check compatible check valve as claimed in claim 9 wherein the hollow member is tubular shaped.

18. A patency check compatible check valve, comprising:

a housing body defining a flow passage, an inlet port communicating with the flow passage, and an outlet port communicating with the flow passage, the housing body further comprising a seal seat in the flow passage between the inlet port and outlet port;

a cantilever valve member disposed in the flow passage and adapted to engage the seal seat, the cantilever valve member comprising a closed position wherein the cantilever valve member engages the seal seat and prevents fluid communication between the inlet port and outlet port and an open position permitting fluid flow from the inlet port to the outlet port in response to fluid flow in the inlet port.

19. A patency check compatible check valve as claimed in claim 18 wherein the seal seat comprises an internal portion of the housing body.

20. A patency check compatible check valve as claimed in claim 18 wherein the cantilever valve member comprises a resilient leaf spring.

21. A patency check compatible check valve as claimed in claim 18 wherein the housing body comprises two inlet ports and the cantilever valve member is fluid flow responsive such that fluid flow in one of the two inlet ports causes the cantilever valve member to form the closed position with the other inlet port.

22. A patency check compatible check valve, comprising:

a housing body defining a flow passage, a first inlet port communicating with the flow passage, a second inlet port communicating with the flow passage, and an outlet port communicating with the flow passage, the first and second inlet ports each comprising an inlet port member extending into the flow passage from opposing sides;

a valve member disposed in the flow passage and comprising opposing recesses receiving the opposing first and second inlet port members and adapted to form a fluid seal with the opposing first and second inlet port members, the valve member being fluid flow responsive to fluid flow in one or both of the first and second inlet ports to form multiple states comprising;

a first state wherein fluid communication between the first inlet port and the outlet port is present while a fluid seal is present between the second inlet port and the outlet port;

a second state wherein fluid communication between the second inlet port and the outlet port is present while a fluid seal is present between the first inlet port and the outlet port; and

a third state wherein fluid communication is at least partially present between both the first inlet port and the second inlet port and the outlet port.

23. A patency check compatible check valve as claimed in claim 22 wherein the valve member is cylindrical shaped and the opposing recesses are defined in opposite ends of the cylindrical valve member.

24. A patency check compatible check valve as claimed in claim 22 wherein the first and second inlet port members are segmented.

25. A patency check compatible check valve as claimed in claim 22 wherein the first and second inlet port members are each formed as a slotted dome.

26. A patency check compatible check valve, comprising:

a housing body defining a flow passage, an inlet port communicating with the flow passage, and an outlet port communicating with the flow passage, the housing body further comprising a seal seat in the flow passage between the inlet port and outlet port;

a valve member disposed in the flow passage and adapted to engage the seal seat, the valve member comprising a closed position wherein the valve member engages the seal seat and prevents fluid communication between the inlet port and outlet port and an open position permitting fluid flow from the inlet port to the outlet port in response to fluid flow in the inlet port; and

a bypass actuator defining at least in part a bypass passage and adapted to selectively place the inlet port in fluid communication with the outlet port, the bypass actuator having a first position wherein fluid flow through the bypass passage to the outlet port is prevented and a bypass position wherein fluid communication is enabled between the inlet port and the outlet port via the bypass passage.

27. A patency check compatible check valve as claimed in claim 26 wherein valve member comprises a hollow member defining an internal flow passage in fluid communication with the flow passage of the housing body.

28. A patency check compatible check valve as claimed in claim 27 wherein fluid flow in the inlet port causes deformation of the hollow member to permit fluid communication between the inlet port and outlet port and place the hollow member in the open position.

29. A patency check compatible check valve as claimed in claim 28 wherein the deformation occurs along a longitudinal axis of the hollow member.

30. A patency check compatible check valve as claimed in claim 28 wherein the hollow member is resiliently deformable such that upon ceasing of fluid flow in the inlet port the hollow member resiliently returns to the closed position.

31. A patency check compatible check valve as claimed in claim 27 wherein the hollow member is tubular shaped.

32. A patency check compatible check valve as claimed in claim 26 wherein the seal seat comprises an internal portion of the housing body.

33. A patency check compatible check valve as claimed in claim 26 wherein the housing body comprises a plurality of inlet ports and a valve member is associated with each inlet port to form the closed position therewith.

34. A patency check compatible check valve as claimed in claim 26 wherein the valve member comprises a disk member adapted to seat against the seal seat.

35. A patency check compatible check valve as claimed in claim 26 wherein the bypass actuator is adapted for rotational movement to select between the first position and the bypass position.

36. A patency check compatible check valve as claimed in claim 26 wherein the bypass actuator comprises a plurality of bypass passages to enable fluid communication between the inlet port and the outlet port via multiple bypass passages.

37. A patency check compatible check valve as claimed in claim 36 wherein the bypass actuator is adapted for rotational movement to select between the first position and the bypass position.

38. A patency check compatible check valve as claimed in claim 26 wherein the bypass actuator comprises a bypass plunger disposed in a cavity defined by the housing body, and wherein in the first position the bypass plunger prevents fluid flow through the bypass passage and in the bypass position at least in part defines the bypass passage such that fluid communication is enabled between the inlet port and the outlet port.

39. A patency check compatible check valve as claimed in claim 38 wherein the first position comprises a raised position of the bypass plunger in the cavity and the bypass position comprises a depressed position of the bypass plunger in the cavity.

40. A patency check compatible check valve as claimed in claim 38 wherein the bypass plunger comprises a plunger head seated in the cavity and a plunger stem extending outward from the housing body, and wherein a bottom side of the plunger head defines a greater fluid contacting surface area than a top side of the plunger head such that reverse fluid flow in the outlet port automatically returns the bypass plunger to the first position.