Device for administering an injectable product in doses

• US 20040133163A1
• Filed: 12/17/2003
• Published: 07/08/2004
• Est. Priority Date: 06/20/2001
• Status: Active Grant

• Current Assignee: TecPharma Licensing AG (Ypsomed Holding AG)
• Original Assignee: TecPharma Licensing AG (Ypsomed Holding AG)
• Inventors: Schiffmann, Frank
• Granted Patent: US 6,986,758 B2
• Time in Patent Office: Days
• US Class Current: 604/131
• CPC Class Codes: A61M 2005/3123 having air entrapping or venting means, e.g. purging channels in pistons
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 5/2033 Spring-loaded one-shot injectors with or without automatic needle insertion multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287
• CPC Class Codes: A61M 5/204 connected to external reservoirs for multiple refilling
• CPC Class Codes: A61M 5/30 Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
• CPC Class Codes: A61M 5/31553 without axial movement of dose setting member
• CPC Class Codes: A61M 5/31563 interacting with a displaceable stop member
• CPC Class Codes: A61M 5/31578 based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod

Abstract

A device for administering an injectable product in doses including a dosage reservoir from which a product dosage is administered, a storage reservoir for storing the product, a transfer conveyor for conveying the product dosage from the storage reservoir into the dosage reservoir, an evacuator for evacuating the dosage reservoir, and a dosing and activating mechanism for performing a dosing movement for selecting the product dosage, a conveying movement for activating the transfer conveyor and an evacuating movement for activating the evacuator.

Claims

1. A device for administering an injectable product in doses, the device comprising:

a) a casing;

b) a dosage reservoir, formed or accommodated by the casing, from which a product dosage is administered;

c) a storage reservoir for storing the product;

d) a transfer conveyor for conveying the product dosage from the storage reservoir into the dosage reservoir;

e) an evacuating means for evacuating the dosage reservoir;

f) a dosing and activating means, connected to the casing, by which a dosing movement for selecting the product dosage, a conveying movement for activating the transfer conveyor and an evacuating movement for activating the evacuating means can be performed relative to the casing;

g) a stopper element, mounted movably to the casing, which is coupled to the dosing and activating means such that the dosing movement of the dosing and activating means positions the stopper element into a stopper position for the transfer conveyor;

h) and a slaving means, mounted movably to the casing, which is coupled to the dosing and activating means such that the dosing movement of the dosing and activating means positions the slaving means into a stopper position and the evacuating movement of the dosing and activating means generates an evacuating movement of the slaving means out of its stopper position;

i) wherein the slaving means slaves the evacuating means during its evacuating movement, thus evacuating the dosage reservoir.

2. The device of claim 1, wherein the stopper element and the casing are connected to one another by a first cam joint and positioning the stopper element is done by a movement along a rotational axis of the first cam joint.

3. The device of claim 2, wherein the conveying movement of the dosing and activating means occurs in the direction of the rotational axis of the first cam joint.

4. The device of claim 2, wherein the dosing and activating means for performing the dosing movement can be rotated about the rotational axis of the first cam joint relative to the casing and slaves the stopper element during its dosing movement.

5. The device of claim 1, wherein the slaving means and the evacuating means are connected to each other by a second cam joint and positioning the slaving means is a movement along a rotational axis of said second cam joint.

6. The device of claim 5, wherein the evacuating movement of the slaving means occurs in the direction of the rotational axis of the second cam joint.

7. The device of claim 5, wherein the evacuating movement of the dosing and activating means occurs in the direction of the rotational axis of the second cam joint.

8. The device of claim 5, wherein the dosing and activating means for performing the dosing movement can be rotated about the rotational axis of the second cam joint relative to the casing and slaves the slaving means during its dosing movement.

9. The device of claim 5, wherein:

the stopper element and the casing are connected to one another by a first cam joint and positioning the stopper element is done by a movement along a rotational axis of the first cam joint;

a cam member of the first cam joint exhibits a first gradient with respect to the rotational axis of the first cam joint and a cam member of the second cam joint exhibits a second gradient with respect to the rotational axis of the second cam joint;

and said first gradient and said second gradient are proportional to each other such that a shifting path length traveled by a piston accommodated in the dosage reservoir, for evacuating the dosage reservoir and administering the product dosage, is constant even for different product dosages.

10. The device of claim 1, wherein the stopper element and the slaving means are movably mounted relative to the casing and relative to each other along an axis.

11. The device of claim 1, wherein the dosing and activating means and the stopper element and the slaving means are configured as sleeve bodies arranged overlapping each other.

12. The device of claim 1, wherein the dosing and activating means and an advancing element, which acts directly or via a piston rod on a piston accommodated in the storage reservoir, are movably mounted along an axis.

13. The device of claim 1, wherein the stopper element is coupled to the dosing and activating means, secured against rotation but such that it can be shifted.

14. The device of claim 1, wherein the slaving means is coupled to the dosing and activating means, secured against rotation but such that it can be shifted.

15. The device of claim 1, wherein:

a piston is accommodated in the storage reservoir and is advanced towards an outlet of the storage reservoir by a piston rod, for conveying the product;

and the dosing and activating means slaves the piston rod during a conveying movement in the advancing direction of the piston rod, until the piston rod or an advancing element connected fixedly or secured against shifting to the piston rod abuts the stopper element which is situated in its stopper position.

16. The device of claim 1, wherein an elastically acting restoring element, arranged between the dosing and activating means and the transfer conveyor, transfers the conveying movement of the dosing and activating means onto the transfer conveyor.

17. The device of claim 1, wherein the evacuating movement of the dosing and activating means is performed against the force of an elastically acting restoring element arranged between the dosing and activating means and the transfer conveyor.

18. The device of claim 1, wherein a piston is accommodated in the dosage reservoir for delivering the product and the evacuating means shifts the piston towards an outlet of the dosage reservoir during the evacuating movement.

19. The device of claim 1, wherein the transfer conveyor comprises a piston which is accommodated in the storage reservoir and is shifted towards an outlet of the storage reservoir by the conveying movement of the dosing and activating means.

20. A device for administering an injectable product in doses, the device comprising:

a) a dosage reservoir from which a product dosage is administered;

b) a storage reservoir for storing the product;

c) a transfer conveyor for conveying the product dosage from the storage reservoir into the dosage reservoir;

d) an evacuating means for evacuating the dosage reservoir; and

e) a dosing and activating means, connected to a casing, for performing a dosing movement for selecting the product dosage, a conveying movement for activating the transfer conveyor and an evacuating movement for activating the evacuating means.

21. The device of claim 20, further including a stopper element coupled to the dosing and activating means such that the dosing movement of the dosing and activating means positions the stopper element into a stopper position for the transfer conveyor.

22. The device of claim 20, further including a slaving means coupled to the dosing and activating means such that the dosing movement of the dosing and activating means positions the slaving means into a stopper position and the evacuating movement of the dosing and activating means generates an evacuating movement of the slaving means out of its stopper position.

23. The device of claim 22, wherein the slaving means slaves the evacuating means during its evacuating movement, thus evacuating the dosage reservoir.