Portable Medical Fluid Delivery Device with Drive Screw Articulated with Reservoir Plunger

• US 20120022453A1
• Filed: 12/30/2009
• Published: 01/26/2012
• Est. Priority Date: 12/31/2008
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Inventors: Yodfat, Ofer, Ben-David, Shai
• Granted Patent: US 9,999,722 B2
• Time in Patent Office: Days
• US Class Current: 604/155
• CPC Class Codes: A61M 2005/14268 with a reusable and a disposable component
• CPC Class Codes: A61M 2005/14506 mechanically driven, e.g. spring or clockwork
• CPC Class Codes: A61M 2005/14533 cam actuated
• CPC Class Codes: A61M 2005/14573 with a replaceable reservoir for quick connection/disconnection with a driving system
• CPC Class Codes: A61M 5/1413 Modular systems comprising interconnecting elements
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/145 using pressurised reservoirs, e.g. pressurised by means of pistons
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: A61M 5/1456 with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
• CPC Class Codes: A61M 5/31513 Piston constructions to improve sealing or sliding
• CPC Class Codes: A61M 5/31515 Connection of piston with piston rod

Abstract

A device for delivering fluid into the body is provided. The device may comprise a reservoir including at least one wall for retaining fluid and a plunger (400), wherein the plunger is articulated with a drive screw (300) having a distal end (304) that rotates within the plunger and displaces the plunger in a linear direction. The device may further comprise a reusable part having a motor, one or more gears and a receiving portion, and also a disposable part having a reservoir, a plunger and a drive screw having a proximal end capable of engaging with the receiving portion upon connecting the reusable part and the disposable part

Claims

1-36. -36. (canceled)

37. A portable pump device for delivering fluid into the body of a user, the device comprising:

a first part comprising a motor, one or more gears and a receiving portion driven by at least one of the motor and the one or more gears; and

a second part configured for removable connection with the first part comprising a reservoir, a plunger and a drive screw having a proximal end and a distal end, the distal end articulated with the plunger, and the proximal end is configured to removably engage with the receiving portion upon connection of the first part and the second part,

wherein rotation of the drive screw by the receiving portion displaces the plunger in a linear direction within the reservoir.

38. The device according to claim 37, wherein the second part further comprises:

an engagement member configured for coupling with the drive screw and having a threaded portion and a non-threaded portion; and

wherein when the drive screw is coupled to the non-threaded portion of the engagement member, the drive screw being configured to move linearly substantially unrestricted, and upon the drive screw being coupled to the threaded portion of the engagement member, the drive screw moves linearly upon rotation of the drive screw.

39. The device according to claim 37, wherein the plunger includes one or more grooves to support one or more gaskets.

40. The device according to claim 37, wherein the plunger includes one or more flaps that contact at least one wall of the reservoir.

41. The device according to claim 37, wherein the plunger includes a socket for engagement of the distal end of the drive screw to provide articulation therebetween.

42. The device according to claim 41, wherein the distal end of the drive screw is spherical in shape.

43. The device according to claim 41, wherein the distal end of the drive screw is truncated.

44. The device according to claim 41, wherein the socket includes a longitudinal cross-section selected from the group consisting of polygonal, circular and a combination thereof and/or includes a transverse cross-section selected from the group consisting of polygonal, circular and a combination thereof.

45. The device according to claim 41, wherein the articulation of the distal end of the drive screw with the socket of the plunger provides angular movement of the drive screw relative to the plunger.

46. The device according to claim 41, wherein the socket includes one or more protrusions for securing the drive screw to the plunger upon engagement of the distal end of the drive screw with the socket.

47. The device according to claim 41, wherein the engagement of the distal end of the drive screw with the socket comprises a snap-fit engagement.

48. The device according to claim 41, wherein articulation of the distal end of the drive screw with the socket is configured to enable pushing of the plunger using the drive screw, pulling of the plunger using the drive screw and substantially unrestricted rotation of the distal end within the socket.

49. The device according to claim 37, wherein the reservoir includes a non-circular cross-section and wherein the cross-section of at least a portion of the plunger corresponds to the non-circular cross-section of the reservoir.

50. The device according to claim 49, wherein the plunger comprises oval shape.

51. The device according to claim 37, wherein at least a portion of a wall of the housing of the disposable part comprises at least a portion of at least one wall of the reservoir.

52. The device according to claim 37, wherein the fluid being delivered comprises insulin.

53. The device according to claim 37, further comprising a cradle unit securable to the skin of the user, wherein one or more of housings of the reusable part and the disposable part are removably connectable to the cradle unit.

54. The device according to claim 37, wherein the first part comprises a reusable part including a reusable part housing and wherein the second part comprises a disposable part including a disposable part housing.

55. The device according to claim 38, wherein the engagement member comprises a drive nut.

56. The device according to claim 40, wherein at least a portion of the one or more flaps

57. A portable pump device for delivering fluid into the body of a user, the device comprising:

a reservoir for retaining the fluid;

a plunger; and

a drive screw having a distal end articulated with the plunger,

wherein rotating the drive screw displaces the plunger in a linear direction within the reservoir;

the plunger includes a socket for engagement of the distal end of the drive screw to provide articulation therebetween; and

the distal end of the drive screw includes a spherical shape and the socket includes a polygonal shape.

58. A portable pump device for delivering fluid into the body of a user, the device comprising:

a reservoir for retaining the fluid;

a plunger; and

a drive screw having a distal end articulated with the plunger,

wherein rotating the drive screw displaces the plunger in a linear direction within the reservoir;

the plunger includes a socket for engagement of the distal end of the drive screw to provide articulation therebetween, such that articulation of the distal end of the drive screw with the socket of the plunger provides angular movement of the drive screw relative to the plunger.