Fluid Transfer Devices With Fluid Bypass And Ambulatory Infusion Devices Including Same

• US 20100286613A1
• Filed: 05/08/2009
• Published: 11/11/2010
• Est. Priority Date: 05/08/2009
• Status: Active Grant

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: Alfred E. Mann Foundation For Scientific Research
• Inventors: Ring, Lawrence Scott
• Granted Patent: US 8,323,247 B2
• Time in Patent Office: Days
• US Class Current: 604/152
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• CPC Class Codes: A61M 5/14276 specially adapted for implantation
• CPC Class Codes: B33Y 30/00 Apparatus for additive manufacturing; Details thereof or accessories therefor
• CPC Class Codes: F04B 17/042 the solenoid motor being separated from the fluid flow

Abstract

Fluid transfer devices for use in, for example, ambulatory infusion devices and infusions devices including fluid transfer devices.

Claims

1-22. -22. (canceled)

23. An infusion device, comprising:

a fluid transfer device including

an external housing member,

an internal housing member located within the external housing member and defining a piston lumen, an outer surface having a perimeter, and a bypass aperture having an inlet associated with the piston lumen and an outlet associated with the outer surface,

a bypass channel in fluid communication with the bypass aperture outlet,

a resilient valve member that extends around the perimeter of the internal housing member outer surface and over the bypass aperture outlet, and

a piston carried within the piston lumen;

an infusion device outlet operably connected to the fluid transfer device; and

a reservoir operably connected to the fluid transfer device such that the fluid transfer device receives fluid from the reservoir.

24. An infusion device as claimed in claim 23, further comprising:

a housing; and

wherein the fluid transfer device and the reservoir are located within the housing.

25. An infusion device as claimed in claim 23, wherein the reservoir comprises a negative pressure reservoir.

26. An infusion device as claimed in claim 23, wherein

the internal housing member outer surface includes an indentation that extends around the perimeter of the internal housing member outer surface;

the bypass aperture outlet is located within the indentation;

the bypass channel extends to the indentation; and

the resilient valve member is located within the indentation.

27. An infusion device as claimed in claim 26, wherein

the indentation comprises an annular indentation;

and

the resilient valve member comprises an annular resilient valve member.

28. An infusion device as claimed in claim 26, further comprising:

a second bypass channel that extends to the indentation and is in fluid communication with the bypass aperture.

29. An infusion device as claimed in claim 23, wherein the resilient valve member comprises an annular resilient valve member.

30. An infusion device as claimed in claim 29, wherein

the piston defines a longitudinal axis;

and

the resilient annular valve member defines a rectangle in a cross-section taken parallel to the longitudinal axis.

31. An infusion device as claimed in claim 23, wherein the external housing member comprises an external tube and the internal housing member comprises an internal tube.

32. An infusion device as claimed in claim 31, wherein the external tube is annular in cross-section and internal tube is substantially annular in cross-section.

33. An infusion device as claimed in claim 23, wherein

the external housing member defines an inner surface;

and

the bypass channel is defined by the external housing member inner surface and the internal housing member outer surface.

34. An infusion device as claimed in claim 33, wherein

the internal housing member outer surface includes longitudinally extending substantially planar surface;

and

the bypass channel is defined by the external housing member inner surface and the internal housing member substantially planar surface.

35. An infusion device as claimed in claim 23, wherein the piston lumen includes an internal bypass channel that is connected to the bypass aperture inlet.

36. An infusion device as claimed in claim 23, wherein

the internal housing member defines a longitudinal end;

the bypass aperture is located adjacent to the internal housing member longitudinal end; and

the fluid transfer device further comprises an inlet valve located adjacent to the internal housing member longitudinal end.

37. An infusion device as claimed in claim 23, further comprising:

a spring that biases the piston to the rest position; and

an electromagnet that, when actuated, moves the piston to a pull-back position.

38. An infusion device, comprising:

a fluid transfer device including

an external housing tube having an inner surface,

an internal housing tube located within the external housing tube and defining a piston lumen, an outer surface having a perimeter, and a bypass aperture having an inlet associated with the piston lumen and an outlet associated with the outer surface,

a bypass channel, defined by the external housing tube inner surface and the internal housing tube outer surface, in fluid communication with the bypass aperture outlet,

a valve member associated with the bypass aperture outlet and movable between an open position and a closed position, and

a piston carried within the piston lumen;

an infusion device outlet operably connected to the fluid transfer device; and

a reservoir operably connected to the fluid transfer device such that the fluid transfer device receives fluid from the reservoir.

39. An infusion device as claimed in claim 38, further comprising:

a housing; and

wherein the fluid transfer device and the reservoir are located within the housing.

40. An infusion device as claimed in claim 38, wherein the reservoir comprises a negative pressure reservoir.

41. An infusion device as claimed in claim 38, wherein

the internal housing tube outer surface includes longitudinally extending substantially planar surface;

and

the bypass channel is defined by the external housing tube inner surface and the internal housing member substantially planar surface.

42. An infusion device as claimed in claim 38, wherein the piston lumen includes an internal bypass channel that is connected to the bypass aperture inlet.

43. An infusion device as claimed in claim 38, wherein the valve member comprises a resilient valve member that extends around the perimeter of the internal housing tube outer surface and over the bypass aperture outlet.

44. An infusion device as claimed in claim 43, wherein

the internal housing tube outer surface includes an indentation that extends around the perimeter of the outer surface;

the bypass aperture outlet is located within the indentation;

the bypass channel extends to the indentation; and

the resilient valve member is located within the indentation.

45. An infusion device as claimed in claim 44, further comprising:

a second bypass channel that extends to the indentation.

46. An infusion device as claimed in claim 38, wherein the external housing tube is annular in cross-section and internal housing tube is substantially annular in cross-section.

47. An infusion device as claimed in claim 38, wherein

the internal housing tube defines a longitudinal end;

the bypass aperture is located adjacent to the internal housing tube longitudinal end; and

the fluid transfer device further comprises an inlet valve located adjacent to the internal housing tube longitudinal end.

48. An infusion device as claimed in claim 38, further comprising:

a spring that biases the piston to a rest position; and

an electromagnet that, when actuated, moves the piston to a pull-back position.