Medicament applicator

• US 6,745,760 B2
• Filed: 04/12/2002
• Issued: 06/08/2004
• Est. Priority Date: 05/15/2001
• Status: Expired due to Term

• Current Assignee: Trudell Medical International (Trudell Medical Limited)
• Original Assignee: Trudell Medical International (Trudell Medical Limited)
• Inventors: Grychowski, Jerry, Morton, Robert, Foley, Martin P., Engelbreth, Daniel K.
• Primary Examiner(s): Lo, Weilun
• Assistant Examiner(s): Mendoza, Michael G.
• Application Number:
  US10/121,931
• Publication Number:
  US 20020170928A1
• Time in Patent Office: 788 Days
• Field of Search: 128/200.14, 128/200.17, 128/200.22, 128/200.23, 128/203.15, 128/203.28
• US Class Current: 128/200.14
• CPC Class Codes: A61M 15/0068 Indicating or counting the number of dispensed doses or of remaining doses
• CPC Class Codes: A61M 15/0075 on a disc
• CPC Class Codes: A61M 15/009 using medicine packages with incorporated spraying means, e.g. aerosol cans pocket atomiser of the injector type A61M11/08
• CPC Class Codes: A61M 15/08 Inhaling devices inserted into the nose
• CPC Class Codes: B05B 11/0038 Inner container disposed in an outer shell or outer casing
• CPC Class Codes: B05B 11/1056 comprising rotatable or articulated levers B05B11/1053 takes precedence; lever actuated piston pumps B05B11/1009; lever actuated pumps with deformable chamber B05B11/1029
• CPC Class Codes: B05B 11/108 Means for counting the number of dispensing strokes
• CPC Class Codes: B65D 83/386 actuation occurring by moving the aerosol container relative to the outer shell or external container
• CPC Class Codes: G01F 13/00 Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups

Abstract

An actuator is used to dispense a medicament from a container having at least a first and second portion. The actuator includes a holder, a trigger member and a push member. The trigger member is pivotally connected to the holder at a pivot axis. The push member is connected to the trigger member. The push member is adapted to move at least the second portion of the container relative to the holder as the push member is pivoted in a first direction. In one preferred embodiment, the trigger member follows a path, and a stop member engages one of the container and push member and immobilizes the push member as the trigger member is moved along a predetermined portion of the path.

Claims

1. An actuator for use in dispensing a medicament from a container having at least a first and second portion, said actuator comprising:

a holder having a grippable portion, wherein said holder is adapted to engage at least the first portion of the container;

a trigger member pivotally connected to said holder at a pivot axis, wherein said trigger member is pivotable about said pivot axis in a first rotational direction toward said grippable portion and a second rotational direction opposite said first direction, wherein said trigger member follows a path as said trigger member is pivoted about said pivot axis in said first rotational direction;

a push member connected to said trigger member, wherein said push member is pivotable about said pivot axis in said first rotational direction in response to said trigger member pivoting in said first rotational direction, wherein said push member is pivotable about said pivot axis in said second rotational direction as said trigger member is pivoted in said second rotational direction, wherein said push member comprises an engagement portion adapted to engage the second portion of the container, wherein said push member is adapted to move at least the second portion of the container relative to said holder, and wherein at least a portion of said push member is moved in a substantially non-parallel relationship to at least a portion of said trigger member as said push member and said trigger member are pivoted in the first and second rotational directions respectively; and

a stop member moveable between an engaged position and a disengaged position, wherein said stop member is engaged with said push member and immobilizes said engagement portion when said stop member is in said engaged position, and wherein said stop member is maintained in said engaged position as said trigger member is pivoted in said first rotational direction along at least a portion of said path.

2. The invention of claim 1 further comprising an indicator member rotatably mounted to said holder and a drive mechanism connected between said indicator member and at least one of said trigger member and said push member, wherein a predetermined number of movements at least one of said trigger member and said push member in at least one of said first and second rotational directions causes said drive mechanism to move said indicator member an incremental amount.

3. The invention of claim 2 wherein said predetermined number is one movement of said at least one of said trigger member and said push member.

4. The invention of claim 2 wherein said drive mechanism comprises a pawl connected to one of said trigger member and said push member, a worm rotatably mounted to said holder, and a ratchet gear coaxially mounted with said worm, and wherein said indicator member comprises gear teeth meshing with said worm, wherein said pawl member is engageable with and moves said ratchet gear as said one of said trigger member and said push member moves in at least one of said first and second rotational directions.

5. The invention of claim 4 further comprising a non-return member connected to said housing, wherein said non-return member is engageable with said ratchet gear and prevents movement of said ratchet gear in at least one direction.

6. The invention of claim 1 wherein said trigger member and said push member are integrally formed as a one-piece member.

7. The invention of claim 1 further comprising a spring biasing said stop member into said engaged position.

8. The invention of claim 1 further comprising a trip member coupled to said trigger member, said trip member moveable between at least an engaged position, wherein said trip member is engaged with said stop member after said trigger member has moved along a predetermined portion of said path, and a disengaged position, wherein said trip member disengages said stop member from said push member when said trip member is moved to said engaged position.

9. The invention of claim 8 wherein said stop member comprises a catch member engaging said push member.

10. The invention of claim 8 further comprising a spring coupled between said trigger member and said push member.

11. The invention of claim 10 wherein said spring is integrally formed between said trigger member and said push member.

12. The invention of claim 1 wherein said push member comprises a biasing member and a spring disposed between said biasing member and said engagement portion.

13. The invention of claim 12 wherein said biasing member is pivotally connected to said trigger member, and wherein said stop member is engaged with said engagement portion.

14. The invention of claim 13 wherein said stop member comprises a pair of stop members engaged with said engagement portion.

15. The invention of claim 13 further comprising a trip member engaged with at least one of said stop member and said engagement portion after said trigger member has moved along a predetermined portion of said path, wherein said trip member moves said stop member from said engaged position to said disengaged position.

16. The invention of claim 1 wherein said push member comprises a stop portion having a curved surface, and wherein said stop member engages said curved surface.

17. The invention of claim 16 wherein said curved surface is a first curved surface and wherein said stop member has a second curved surface mating with said first curved surface.

18. The invention of claim 1 wherein said push member comprises a pivot member engaged with said stop member, and a trip member coupled to said trigger member, said trip member moveable between at least an engaged position, wherein said trip member is engaged with said pivot member after said trigger member has moved along a predetermined portion of said path, and a disengaged position, wherein said pivot member disengages said stop member from said push member when said trip member is moved to said engaged position.

19. The invention of claim 1 wherein said trigger member is a first trigger member and wherein said grippable portion of said holder comprises a second trigger member.

20. An actuator for use in dispensing a medicament from a container having at least a first and second portion, said actuator comprising:

a holder having a grippable portion, wherein said holder is adapted to engage at least the first portion of the container;

a trigger member pivotally connected to said holder at a pivot axis, wherein said trigger member is pivotable about said pivot axis in a first rotational direction toward said grippable portion and a second rotational direction opposite said first direction, wherein said trigger member follows a path as said trigger member is pivoted about said pivot axis in said first rotational direction;

a push member connected to said trigger member, wherein said push member is pivotable about said pivot axis in said first rotational direction in response to said trigger member pivoting in said first rotational direction, wherein said push member is pivotable about said pivot axis in said second rotational direction as said trigger member is pivoted in said second rotational direction, wherein said push member comprises an engagement portion adapted to engage the second portion of the container, wherein said push member is adapted to move at least the second portion of the container relative to said holder, and wherein at least a portion of said push member is moved in a substantially non-parallel relationship to at least a portion of said trigger member as said push member and said trigger member are pivoted in the first and second rotational directions respectively; and

a first stop member adapted to engage said second portion of said container in opposition to said push member, and a second stop member moveable between an engaged position and a disengaged position, wherein said second stop member is engaged with said first stop member and immobilizes said engagement portion when said second stop member is in said engaged position, and wherein said second stop member is maintained in said engaged position as said trigger member is pivoted in said first rotational direction along at least a portion of said path.

21. The invention of claim 20 further comprising a trip member coupled to at least one of said trigger member and said push member, said trip member moveable between at least an engaged position, wherein said trip member is engaged with said one of said first and second stop members after said trigger member has moved along a predetermined portion of said path, and a disengaged position, wherein said trip member disengages said second stop member from said first stop member when said trip member is moved to said engaged position.

22. The invention of claim 21 wherein said first stop member comprises a pivot member engaged with said second stop member, wherein said trip member engages said pivot member when said trip member is moved to said engaged position.

23. An inhaler for dispensing a medicament comprising:

a container having a first portion moveable relative to a second portion along a longitudinal axis in a longitudinal direction;

a holder comprising a grippable portion, said holder engaging at least said first portion of said container;

a trigger member pivotally connected to said holder at a pivot axis, wherein said trigger member is pivotable about said pivot axis in a first rotational direction toward said grippable portion and a second rotational direction opposite said first direction, wherein said pivot axis is substantially perpendicular to said longitudinal axis, wherein at least a portion of said trigger member moves in a lateral direction substantially non-parallel to said longitudinal direction as said trigger member is pivoted in said first and second rotational directions, and wherein said trigger member follows a path as said trigger member is pivoted about said pivot axis in said first rotational direction;

a push member connected to said trigger, wherein said push member is pivotable about said pivot axis in said first rotational direction as said trigger member is pivoted in said first rotational direction, wherein said push member is pivotable about said pivot axis in said second rotational direction as said trigger member is pivoted in said second rotational direction, wherein said push member comprises an engagement portion engaging the second portion of the container and moves said second portion relative to said holder and said first portion of said container in said longitudinal direction as said push member is pivoted in said first rotational direction; and

a stop member moveable between an engaged position and a disengaged position, wherein said stop member is engaged with one of said push member and said container and immobilizes said engagement portion when said stop member is in said engaged position, and wherein said stop member is maintained in said engaged position as said trigger member is pivoted in said first rotational direction along at least a portion of said path.

24. The invention of claim 23 further comprising an indicator member rotatably mounted to said holder and a drive mechanism connected between said indicator member and at least one of said trigger member and said push member, wherein a predetermined number of movements at least one of said trigger member and said push member in at least one of said first and second rotational directions causes said drive mechanism to move said indicator member an incremental amount.

25. The invention of claim 24 wherein said predetermined number is one movement of said at least one of said trigger member and said push member.

26. The invention of claim 24 wherein said drive mechanism comprises a pawl connected to one of said trigger member and said push member, a worm rotatably mounted to said holder, and a ratchet gear coaxially mounted with said worm, and wherein said indicator member comprises gear teeth meshing with said worm, wherein said pawl member is engageable with and moves said ratchet gear as said one of said trigger member and said push member moves in at least one of said first and second rotational directions.

27. The invention of claim 26 further comprising a non-return member connected to said housing, wherein said non-return member is engageable with said ratchet gear and prevents movement of said ratchet gear in at least one direction.

28. The invention of claim 23 wherein said trigger member and said push member are integrally formed as a one-piece member.

29. The invention of claim 23 further comprising a spring biasing said stop member into said engaged position.

30. The invention of claim 23 further comprising a trip member coupled to said trigger member, said trip member moveable between at least an engaged position, wherein said trip member is engaged with said stop member after said trigger member has moved along a predetermined portion of said path, and a disengaged position, wherein said trip member disengages said stop member from said one of said push member and said container when said trip member is moved to said engaged position.

31. The invention of claim 30 wherein said stop member comprises a catch member engaging said push member.

32. The invention of claim 30 further comprising a spring coupled between said trigger member and said push member.

33. The invention of claim 32 wherein said spring is integrally formed between said trigger member and said push member.

34. The invention of claim 23 wherein said push member further comprises a biasing member and a spring disposed between said biasing member and said engagement portion.

35. The invention of claim 34 wherein said biasing member is pivotally connected to said trigger member, and wherein said stop member is engaged with said engagement portion.

36. The invention of claim 35 wherein said stop member comprises a pair of stop members engaged with said engagement portion respectively.

37. The invention of claim 35 further comprising a trip member engaged with at least one of said stop member and said engagement portion after said trigger member has moved along a predetermined portion of said path, wherein said trip member moves said stop member from said engaged position to said disengaged position.

38. The invention of claim 23 wherein said push member comprises a stop portion having a curved surface, and wherein said stop member engages said curved surface.

39. The invention of claim 38 wherein said curved surface is a first curved surface and wherein said stop member has a second curved surface mating with said first curved surface.

40. The invention of claim 23 wherein said push member comprises a pivot member engaged with said stop member, and a trip member coupled to said trigger member, said trip member moveable between an engaged position, wherein said trip member is engaged with pivot member after said trigger member has moved along a predetermined portion of said path, and a disengaged position, wherein said pivot member disengages said stop member from said push member when said trip member is moved to said engaged position.

41. The invention of claim 23 wherein said stop member comprises a first stop member engaging said second portion of said container in opposition to said push member, and a second stop member moveable between said engaged position and said disengaged position, wherein said second stop member is engaged with said first stop member and immobilizes said engagement portion when said second stop member is in said engaged position.

42. The invention of claim 41 further comprising a trip member coupled to at least one of said trigger member and said push member, said trip member moveable between an engaged position, wherein said trip member is engaged with one of said first and second stop members after said trigger member has moved along a predetermined portion of said path, and a disengaged position, wherein said trip member disengages said second stop member from said first stop member when said trip member is moved to said engaged position.

43. The invention of claim 42 wherein said first stop member comprises a pivot member engaged with said second stop member, wherein said trip member engages said pivot member when moved to said engaged position.

44. The invention of claim 23 wherein said first portion of said container comprises a valve stem.

45. A method for dispensing a medicament from a container having a first portion moveable relative to a second portion in a longitudinal direction, the method comprising:

providing an actuator comprising a holder having a grippable portion, a trigger member pivotally connected to said holder at a first pivot axis, and a push member connected to said trigger;

engaging at least said first portion of said container with said holder;

pivoting said trigger member about said pivot axis in a first rotational direction toward said grippable portion and thereby moving at least a portion of said trigger member in a lateral direction substantially non-parallel to said longitudinal direction as said trigger member is pivoted in said first and second rotational directions, wherein said pivoting said trigger member comprises moving said trigger member along a path;

pivoting said push member about said pivot axis in said first rotational direction and thereby moving at least a portion of said push member in said longitudinal direction;

engaging at least said second portion of said container with an engagement portion of said push member;

engaging one of said container and said push member with a stop member and thereby immobilizing said engagement portion as said trigger member is pivoted in said first rotational direction along at least a portion of said path; and

moving said second portion of said container relative to said holder and said first portion of said container with said push member in said longitudinal direction as said push member pivots about said pivot axis in said first rotational direction.

46. The invention of claim 45 further comprising pivoting said trigger member and said push member about said pivot axis in a second rotational direction opposite said first rotational direction.

47. The invention of claim 46 further comprising an indicator member rotatably mounted to said holder and a drive mechanism connected between said indicator member and at least one of said trigger member and said push member, and further comprising actuating said drive mechanism with said at least one of said trigger member and said push member as said at least one of said trigger member and said push member are pivoted in at least one of said first and second rotational directions, and rotating said indicator member in incremental amount with said drive mechanism upon a predetermined number of movements of said at least one of said trigger member and said push member in said at least one of said first and second rotational directions.

48. The invention of claim 47 wherein said predetermined number is one movement of said at least one of said trigger member and said push member in said at least one of said first and second rotational directions.

49. The invention of claim 47 wherein said drive mechanism comprises a pawl connected to one of said trigger member and said push member, a worm rotatably mounted to said holder, and a ratchet gear coaxially mounted with said worm, and wherein said indicator member comprises gear teeth meshing with said worm, and wherein said actuating said drive mechanism with said at least one of said trigger member and said push member comprises moving said ratchet gear with said pawl and thereby moving said worm coaxially mounted with said ratchet gear, and moving said indicator member with said worm.

50. The invention of claim 49 further comprising a non-return member connected to said housing, wherein said non-return member is engageable with said ratchet gear and prevents movement of said ratchet gear in at least one direction.

51. The invention of claim 45 wherein said trigger member and said push member are integrally formed as a one-piece member.

52. The invention of claim 45 further comprising biasing said stop member into engagement with said one of said container and said push member with a spring.

53. The invention of claim 45 further comprising engaging said stop member with a trip member coupled to said trigger member after said trigger member has moved along a predetermined portion of said path, disengaging said stop member from said one of said push member and said container with said trip member, and thereafter moving said second portion of said container relative to said holder and said first portion of said container with said engagement portion of said push member as said push member pivots about said pivot axis in said first rotational direction.

54. The invention of claim 53 wherein said stop member comprises a catch member engaging said push member.

55. The invention of claim 53 wherein said moving said second portion of said container relative to said holder and said first portion of said container with said engagement portion of said push member comprises biasing said engagement portion with a spring coupled between said trigger member and said engagement portion.

56. The invention of claim 55 wherein said spring is integrally formed between said trigger member and said engagement portion of said push member.

57. The invention of claim 45 wherein said push member further comprises a biasing member, and wherein said moving said second portion of said container relative to said holder and said first portion of said container with said engagement portion of said push member comprises biasing said engagement portion with a spring disposed between said biasing member and said engagement portion.

58. The invention of claim 57 wherein said biasing member is pivotally connected to said trigger member.

59. The invention of claim 58 engaging said stop member with a trip member coupled to one of said biasing member and said push member after said trigger member has moved along a predetermined portion of said path, disengaging said stop member from said one of said push member and said container with said trip member, and thereafter moving said second portion of said container relative to said holder and said first portion of said container with said engagement portion.

60. The invention of claim 45 wherein said push member comprises a stop portion, and wherein said engaging one of said container and said push member with a stop member comprises engaging a curved surface formed on said stop portion.

61. The invention of claim 60 wherein said curved surface is a first curved surface and wherein said stop member has a second curved surface mating with said first curved surface.

62. The invention of claim 45 further comprising engaging said stop member with a pivot member coupled to said push member, pivoting said pivot member with a trip member coupled to said trigger member after said trigger member has moved along a predetermined portion of said path and thereby disengaging said stop member from said pivot member and thereafter moving said second portion of said container relative to said holder and said first portion of said container with said engagement portion.

63. The invention of claim 45 wherein said stop member comprises a first stop member engaging said second portion of said container in opposition to said push member and a second stop member pivotally secured to said housing, and further comprising engaging said first stop member with said second stop member and thereby immobilizing said engagement portion.

64. The invention of claim 63 further comprising disengaging said second stop member from said first stop member with a trip member coupled to at least one of said trigger member and said push member after said trigger member has moved along a predetermined portion of said path.

65. The invention of claim 45 wherein said first portion of said container comprises a valve stem.