DEVICE FOR ADJUSTING A DOSAGE WITH A LIMITING MECHANISM FOR A DEVICE FOR ADMINISTERING A PRODUCT

• US 20190321558A1
• Filed: 07/01/2019
• Published: 10/24/2019
• Est. Priority Date: 05/16/2012
• Status: Active Grant

• Current Assignee: Ypsomed AG (Ypsomed Holding AG)
• Original Assignee: TecPharma Licensing AG (Ypsomed Holding AG)
• Inventors: Hirschel, Jurg, Moser, Ulrich
• Granted Patent: US 11,103,646 B2
• Time in Patent Office: Days
• CPC Class Codes: A61M 2005/3126 Specific display means related to dosing
• CPC Class Codes: A61M 5/31541 Means preventing setting of a dose beyond the amount remaining in the cartridge
• CPC Class Codes: A61M 5/3155 by rotational movement of dose setting member, e.g. during setting or filling of a syringe
• CPC Class Codes: A61M 5/31551 including axial movement of dose setting member
• CPC Class Codes: A61M 5/3156 using volume steps only adjustable in discrete intervals, i.e. individually distinct intervals

Abstract

Dosing device for an administration device with a limiting mechanism, comprising a first limiting means with a first stop means, a second limiting means with a second stop means, wherein the second limiting means follows movements of the first limiting means during dosing movements with a defined transmission ratio, and wherein the first and the second stop means each describe a path curve by their movements in such a manner that the two path curves intersect in at least one point or come so close together that the stop means contact one another in a stop position, whereby a blocking of the movement of the limiting means relative to each other during dosing movements can be effected in that the respective path curves described by the first and second stop means are closed and can be run through preferably multiple times by the first stop means, by the second stop means or by both stop means until the stop means contact one another at the stop position.

Claims

1. A device for liquid product administration with a dose limiting mechanism, comprising:

a housing forming a receptacle for the product;

a dosing sleeve in threaded engagement with the inside of the housing for a rotating movement to set a product dosage;

a piston rod axially movable relative to the housing in a conveyance direction in order to eject a set product dosage but not rotatable relative to the housing;

a drive element that is actuated by an ejection button and operatively connected with the piston rod in a kinematic arrangement to eject the set product dosage;

a last dose limiter comprising a first stop and a second stop, at least one of the first stop and the second stop being operably connected to the dosing sleeve so as to receive rotation from dose setting rotating movement of the dosing sleeve;

each of the first stop and the second stop describes a path of movement during dose setting in such a manner that by their movements the two stops advance each on their respective paths to intersect in at least one point or come so close together that the first stop and second stop strike against one another, whereby a blocking of movement occurs on or between the paths of movement and blocking of further dosing movement is effected; and

a coupling device operatively connected to the dosing sleeve, whereby pressing the ejection button initiates a coupling engagement to drive the piston rod for dose delivery and during dose delivery the first stop and second stop do not advance on their respective paths toward blocking.

2. The device of claim 1 wherein the at least one of the first stop and the second stop is directly connected to the dosing sleeve.

3. The device of claim 2 wherein the at least one of the first stop and the second stop is fixedly connected to the dosing sleeve.

4. The device according to claim 1 wherein the at least one of the first stop and the second stop forms a unitary part of the dosing sleeve.

5. The device of claim 1 wherein the at least one of first stop and the second stop is on an inner axial wall of the dosing sleeve.

6. The device of claim 5 wherein the at least one of first stop and the second stop is located at an end section of the dosing sleeve.

7. The device of claim 6 wherein the at least one of first stop and the second stop extends towards a central axis of the dosing sleeve thereby partially reducing the inner diameter of the dosing sleeve.

8. The device of claim 7 wherein the at least one of first stop and the second stop is oriented parallel to the central axis of the dosing sleeve.

9. The device according to claim 8 wherein the at least one of first stop and the second stop is constructed as a wedge.

10. A dosing device for an administration device with a limiting mechanism, comprising:

a first limiting stop,

a second limiting stop,

wherein the second limiting stop proportionally follows movements of the first limiting stop during dosing,

wherein the second limiting stop does not move relative to the first limiting stop during administration processes, and

wherein the first limiting stop and the second limiting stop each describes a path by its movements in such a manner that the two paths intersect in at least one point or come so close together that the first limiting stop and second limiting stop contact one another in a stop position, whereby a blocking of the movement of the first limiting stop and second limiting stop relative to each other during dosing movements can be effected,

wherein at least one of the respective paths described by the first limiting stop and second limiting stop can be run through multiple times until the first limiting stop and second limiting stop contact one another at the stop position.

11. A dosing device according to claim 10, further comprising:

a sleeve-like dosing member with an inner wall, an outer wall and a central axis, wherein at least one of the first limiting stop and second limiting stop is constructed as a wedge or rib on the inner wall.

12. The device of claim 11 wherein the at least one of the first limiting stop and the second limiting stop is directly connected to the dosing member.

13. The device of claim 12 wherein the at least one of the first limiting stop and the second limiting stop is fixedly connected to the dosing member.

14. The device according to claim 11 wherein the at least one of the first g stop and the second limiting stop forms a unitary part of the dosing member.

15. The device of claim 11 wherein the at least one of the first limiting stop and the second limiting stop is on an inner axial wall of the dosing member.

16. The device of claim 15 wherein the at least one of the first limiting stop and the second limiting stop is located at an end section of the dosing member.

17. The device of claim 16 wherein the at least one of the first limiting stop and the second limiting stop extends towards the central axis of the dosing member, thereby partially reducing the inner diameter of the dosing member.

18. The device of claim 17 wherein the at least one of the first limiting stop and the second g stop is oriented parallel to the central axis of the dosing member.

19. The device according to claim 18 wherein the first limiting stop is constructed as a wedge or rib on the inner axial wall.