Engagement and sensing systems and methods

• US 8,858,500 B2
• Filed: 12/30/2009
• Issued: 10/14/2014
• Est. Priority Date: 12/30/2009
• Status: Active Grant

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Inventors: Hanson, Ian B., Bente, Paul F. IV
• Primary Examiner(s): FLICK, JASON E
• Application Number:
  US12/650,287
• Publication Number:
  US 20110160666A1
• Time in Patent Office: 1,749 Days
• Field of Search: 604151-155, 604/241, 604/32, 604/500
• US Class Current: 604/151
• CPC Class Codes: A61M 2005/14268 with a reusable and a disposable component
• CPC Class Codes: A61M 5/1413 Modular systems comprising interconnecting elements
• CPC Class Codes: A61M 5/14248 of the skin patch type
• 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 5/1723 using feedback of body parameters, e.g. blood-sugar, pressure measurement of body parameters A61B5/00
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A delivery device for delivering fluidic media may include a second housing portion configured to be selectively engaged with and disengaged from a first housing portion adapted to be carried by a user, a drive device configured to be operatively engageable with a plunger arm connected to a plunger head arranged for movement in an axial direction of a reservoir supported by one of the first and second housing portion to drive fluidic media from the reservoir, a drive linkage for operatively engaging the drive device with the plunger arm for allowing the drive device to move the plunger arm, the drive device including a first gear engageable with the plunger arm and a second gear configured for lateral movement to allow the second gear to engage the plunger arm.

Claims

1. A delivery device for delivering fluidic media, the delivery device comprising:

a first housing portion adapted to be secured to a user;

a second housing portion configured to be selectively engaged with and disengaged from the first housing portion, one of the first housing portion and the second housing portion for supporting a reservoir for containing fluidic media;

a drive device configured to be operatively engagable with a plunger arm connected to a plunger head arranged for movement by the drive device in an axial direction of the reservoir, the drive device configured to drive fluidic media from the reservoir in a case where the drive device is operatively engaged with the reservoir and the plunger arm is moved in the axial direction relative to the reservoir; and

a drive linkage for operatively engaging the drive device with the plunger arm to allow the drive device to move the plunger arm, the drive linkage including a first gear and a second gear operatively engaged with each other, the first gear engageable with the plunger arm, the second gear supported on a shaft having an axis and a longitudinal dimension, the second gear supported for rotation about the axis of the shaft, the second gear supported for lateral movement in a direction along the longitudinal dimension of the shaft such that the lateral movement of the second gear allows the first gear to engage the plunger arm.

2. The delivery device according to claim 1, the drive linkage comprising a worm and a worm gear operatively engaged with the worm, the worm gear for operatively engaging the plunger arm, the worm having an engagement gear operatively engaged with the drive device such that the worm is moveably driven with rotation of the engagement gear by the drive device.

3. The delivery device according to claim 2,

wherein the first gear comprises the worm gear;

and

wherein the second gear comprises the worm and the engagement gear.

4. The delivery device according to claim 2, wherein the worm and the engagement gear are integral to each other.

5. The delivery device according to claim 2, wherein the worm and the engagement gear comprise plastic.

6. The delivery device according to claim 1, the second gear configured to be movable along the longitudinal dimension of the shaft at least between a first position and a second position.

7. The delivery device according to claim 6, the second gear configured to be moveable to the first position to reduce a rotational range of motion of the first gear relative to the plunger arm in a case where the first gear and the plunger arm are engaged and the second gear is in the second position.

8. The delivery device according to claim 7, wherein the second gear is configured to be moved to the first position by the drive device.

9. The delivery device according to claim 7, the delivery device further comprising:

a sensor configured to measure a pressure on the sensor caused by the second gear.

10. The delivery device according to claim 9,

wherein the pressure on the sensor caused by the second gear corresponds to a force on the plunger arm;

and

wherein the second gear contacts at least one of the sensor or a structure supporting the sensor in a case where the second gear is in the first position.

11. The delivery device according to claim 6, the delivery device further comprising:

a sensor configured to measure a pressure on the sensor caused by the second gear, the pressure on the sensor caused by the second gear corresponding to a force on the plunger arm.

12. The delivery device according to claim 11,

wherein the plunger arm and the first gear are arranged so that the force on the plunger arm applies a torque on the first gear;

and

wherein the first gear and the second gear are arranged so that the torque on the first gear applies a force on the second gear for applying pressure to the sensor in a case where the second gear is in the second position.

13. The delivery device of claim 6,

the shaft having a first end and a second end defining the longitudinal dimension of the shaft;

wherein the second gear is a first distance away from the first end of the shaft, in the first position; and

wherein the second gear is a second distance, different from the first distance, away from the first end of the shaft, in the second position.

14. The delivery device according to claim 1, the second gear configured to be slidable along the longitudinal dimension of the shaft.

15. The delivery device according to claim 1, wherein the first gear is supported on a rotatable shaft for rotational movement about an axis of the rotatable shaft, the first gear for operatively engaging the plunger arm to allow the drive device to drive fluidic media from the reservoir in a case where the drive device is operatively engaged with the reservoir and the plunger arm is moved in the axial direction relative to the reservoir.

16. The delivery device according to claim 15, the first gear further comprising a gear supported on the rotatable shaft for rotational movement about the axis of the rotatable shaft, the gear for engaging the plunger arm to allow the drive device to drive fluidic media from the reservoir in a case where the drive device is operatively engaged with the reservoir and the plunger arm is moved in the axial direction relative to the reservoir.

17. The delivery device according to claim 16,

the gear having one of threads and teeth, the plunger arm having one of corresponding threads and teeth for mating with the one of the threads and teeth of the gear upon the one of the threads and teeth of the gear aligning with the one of the corresponding threads and teeth of the plunger arm;

wherein the first gear and the plunger arm are arranged so that the gear engages the plunger arm in a case where the one of the threads and teeth of the gear align with the one of the corresponding threads and teeth of the plunger arm.

18. The delivery device according to claim 16, wherein the gear comprises a pinion gear.

19. The delivery device according to claim 15, wherein at least one of (i) the second gear is arranged to be at least partially slidable along the shaft to allow the first gear to rotate to an orientation for allowing the first gear to operatively engage the plunger arm and (ii) the first gear is arranged to be at least partially rotatable about the axis of the rotatable shaft to allow the first gear to rotate to an orientation for allowing the first gear to operatively engage the plunger arm.

20. The delivery device according to claim 19,

the first gear having one of threads and teeth, the plunger arm having one of corresponding threads and teeth for mating with the one of the threads and teeth of the first gear upon the one of the threads and teeth of the first gear aligning with the one of the corresponding threads and teeth of the plunger arm;

wherein the first gear and the plunger arm are arranged so that the first gear engages the plunger arm in a case where the one of the threads and teeth of the first gear align with the one of the corresponding threads and teeth of the plunger arm.

21. The delivery device according to claim 19, the first gear configured to operatively engage the plunger arm in a case where the first gear and the plunger arm are brought together and the first gear is in a first orientation relative to the plunger arm.

22. The delivery device according to claim 21, the first gear configured to be moveable to the first orientation relative to the plunger arm from a second orientation relative to the plunger arm in a case where the first gear and the plunger arm are brought together and the first gear is in the second orientation relative to the plunger arm.

23. The delivery device according to claim 22, wherein the first gear is not engageable with the plunger arm in the second orientation.

24. The delivery device according to claim 15, wherein the plunger arm comprises at least one of a drive screw and a rack having threads extending along a longitudinal dimension of the rack for operatively engaging with the first gear to allow the drive device to drive fluidic media from the reservoir in a case where the drive device is operatively engaged with the reservoir and the plunger arm is moved in the axial direction relative to the reservoir.

25. A delivery device according to claim 1, further comprising:

processing electronics configured to process a plurality of signals or signal parameters, including a first signal or signal parameter representing a first operating condition of the delivery device, a second signal or signal parameter representing a second operating condition of the delivery device, and a third signal or signal parameter representing a third operating condition of the delivery device;

the processing electronics further configured to determine whether each of the plurality of signals or signal parameters meets a respective predetermined parameter;

the processing electronics further configured to determine a result based on whether each of the plurality of signals or signal parameters met the respective predetermined parameter and to provide a signal based on the result representing the operating condition of the delivery device.

26. The delivery device of claim 25, wherein the signal comprises a user-perceptible indication to a user.

27. The delivery device of claim 25, wherein the delivery device is operating properly in a case where each of the plurality of signals or signal parameters meets the respective determined parameter.

28. The delivery device of claim 25, wherein the first signal or signal parameter corresponds to an amount a drive device is controlled to move by the circuitry.

29. The delivery device of claim 25, wherein the second signal or signal parameter corresponds to an amount the drive device is moved by the circuitry.

30. The delivery device of claim 25, wherein the third signal or signal parameter corresponds to an amount the plunger head is moved.

31. The delivery device of claim 25,

wherein the first signal or signal parameter corresponds to an amount a drive device is controlled to move by the circuitry;

wherein the second signal or signal parameter corresponds to an amount the drive device is moved by the circuitry; and

wherein the third signal or signal parameter corresponds to an amount the plunger head is moved.

32. The delivery device of claim 1,

the shaft having a first end and a second end defining the longitudinal dimension of the shaft;

the second gear configured for lateral movement between the first end and the second end of the shaft.

33. The delivery device of claim 1,

the shaft having a first end and a second end defining the longitudinal dimension of the shaft;

the second gear configured for lateral movement relative to the first end and the second end of the shaft.

34. The delivery device of claim 1, wherein the shaft extends through the second gear.

35. The delivery device of claim 1,

the shaft having a first end and a second end defining the longitudinal dimension of the shaft;

wherein the shaft is configured for lateral movement with the second gear.

36. The delivery device of claim 35,

wherein the first gear is a first distance away from the first end of the shaft, in the first position;

and

wherein the first gear is a second distance away from the first end of the shaft, in the second position.

37. A method of making a delivery device for delivering fluidic media, the method comprising:

adapting a first housing portion to be secured to a user;

configuring a second housing portion to be selectively engaged with and disengaged from the first housing portion, one of the first housing portion and the second housing portion for supporting a reservoir for containing fluidic media;

configuring a drive device to be operatively engagable with a plunger arm connected to a plunger head arranged for movement by the drive device in an axial direction of the reservoir, the drive device configured to drive fluidic media from the reservoir in a case where the drive device is operatively engaged with the reservoir and the plunger arm is moved in the axial direction relative to the reservoir;

operatively engaging a drive linkage operatively engaged between the drive device and the plunger arm; and

providing a drive linkage for operatively engaging the drive device with the plunger arm to allow the drive device to move the plunger arm, the drive linkage including a first gear and a second gear operatively engaged with each other, the first gear engageable with the plunger arm, the second gear supported on a shaft having an axis and a longitudinal dimension, the second gear supported for rotation about the axis of the shaft, the second gear supported for lateral movement in a direction along the longitudinal dimension of the shaft such that the lateral movement of the second gear allows the first gear to engage the plunger arm.

38. A delivery device for delivering fluidic media, the delivery device comprising:

a first housing portion adapted to be secured to a user;

a second housing portion configured to be selectively engaged with and disengaged from the first housing portion, one of the first housing portion and the second housing portion for supporting a reservoir for containing fluidic media;

a drive device configured to be operatively engagable with a plunger arm connected to a plunger head arranged for movement by the drive device in an axial direction of the reservoir, the drive device configured to drive fluidic media from the reservoir in a case where the drive device is operatively engaged with the reservoir and the plunger arm is moved in the axial direction relative to the reservoir; and

a drive linkage for operatively engaging the drive device with the plunger arm to allow the drive device to move the plunger arm; and

a sensor configured to measure a force on the drive linkage corresponding to a force on the plunger arm.

39. A delivery device according to claim 38, the sensor configured to measure a linear force of the drive linkage, the linear force of the drive linkage corresponding to the force on the plunger arm.

40. A delivery device according to claim 38, wherein the force on the plunger arm is in a direction opposite a direction of movement of the plunger arm to deliver fluidic media from the reservoir.

41. A delivery device according to claim 38,

the drive linkage having a first gear operatively engaged with a second gear;

wherein the plunger arm and the first gear are arranged so that the force on the plunger arm applies a torque on the first gear; and

wherein the first gear and the second gear are arranged so that the torque on the first gear applies the linear force on the second gear.

42. A delivery device according to claim 41,

wherein the first gear comprises a worm gear;

and

wherein the second gear comprises a worm.

43. A delivery device according to claim 41, the delivery device further comprising:

circuitry for controlling the drive device;

the first gear operatively engageable with the plunger arm to allow the drive device to move the plunger arm;

the circuitry configured to control the drive device to move at least one of the first gear and the second gear based on a measurement of the sensor.

44. A delivery device according to claim 43, the circuitry configured to control the drive device to move the first gear to reduce a rotational range of motion of the first gear relative to the plunger arm.

45. A delivery device according to claim 43, the circuitry configured to control the drive device to move the second gear to reduce a rotational range of motion of the first gear relative to the plunger arm.

46. A delivery device according to claim 45, the circuitry configured to control the drive device to move the second gear to reduce the rotational range of motion of the first gear relative to the plunger arm sufficiently to allow the drive device to move the plunger arm.

47. A delivery device according to claim 43, wherein the drive device is controlled to move at least one of the first gear and the second gear by the circuitry based on the force measured by the sensor.

48. A delivery device according to claim 43, wherein the drive device comprises an electrical motor.

49. A delivery device according to claim 38, wherein the sensor comprises a force sensor.

50. The delivery device of claim 38, wherein the drive linkage is arranged to exert the measured force on the sensor.

51. A method of making a delivery device for delivering fluidic media, the method device comprising:

adapting a first housing portion to be secured to a user;

configuring a second housing portion to be selectively engaged with and disengaged from the first housing portion, one of the first housing portion and the second housing portion for supporting a reservoir for containing fluidic media;

configuring a drive device to be operatively engagable with a plunger arm connected to a plunger head arranged for movement by the drive device in an axial direction of the reservoir, the drive device configured to drive fluidic media from the reservoir in a case where the drive device is operatively engaged with the reservoir and the plunger arm is moved in the axial direction relative to the reservoir;

providing a drive linkage for operatively engaging the drive device with the plunger arm to allow the drive device to move the plunger arm; and

configuring a sensor to measure a force on the drive linkage corresponding to a force on the plunger arm.