CARTRIDGE HOLDER ASSEMBLY FOR DRUG DELIVERY DEVICES

• US 20140121606A1
• Filed: 06/14/2012
• Published: 05/01/2014
• Est. Priority Date: 06/17/2011
• Status: Active Grant

• Current Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Original Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Inventors: Jugl, Michael, Kraft, Torsten, Forstreuter, Axel, Vogt, Daniel
• Granted Patent: US 9,731,075 B2
• Time in Patent Office: Days
• US Class Current: 604/232
• CPC Class Codes: A61M 2005/2407 from the rear
• CPC Class Codes: A61M 2005/2492 via snap connection
• CPC Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: A61M 5/31543 piston rod reset means, i.e. means for causing or facilitating retraction of piston rod to its starting position during cartridge change
• CPC Class Codes: A61M 5/31585 performed by axially moving actuator, e.g. an injection button

Abstract

The present invention relates to a drug delivery device for administering a predefined dose of a medicament comprising of housing. The housing comprising of a body to accommodate a drive mechanism, a cartridge holder to accommodate a cartridge having a piston slidably disposed therein in an axial direction (z), and an interconnection between cartridge holder and body, said interconnection having at least one displaceable or resiliently deformable latch element to mate with a corresponding bearing, wherein the latch element is displaceable or deformable in a direction (z, w) extending substantially parallel to a circumferential side wall of the body or cartridge holder.

Claims

1-13. -13. (canceled)

14. A drug delivery device for administering a predefined dose of a medicament comprising a housing having:

a body to accommodate a drive mechanism,

a cartridge holder to accommodate a cartridge having a piston slidably disposed therein in an axial direction (z),

an interconnection between cartridge holder and body, said interconnection having at least one displaceable or resiliently deformable latch element to mate with a corresponding bearing, wherein the latch element is displaceable or deformable in a direction (z, w) extending substantially parallel to a circumferential side wall of the body or cartridge holder.

15. The drug delivery device according to claim 14, wherein cartridge holder and body comprise an insert portion and a corresponding receptacle portion for establishing an at least partially interleaved interconnection of cartridge holder and body.

16. The drug delivery device according to claim 15, wherein the cartridge holder comprises the insert portion to be inserted into the receptacle portion of the body, or vice versa.

17. The drug delivery device according to claim 15, wherein the insert portion comprises the at least one latch element extending in longitudinal direction (z) and having at least one resiliently deformable spreading piece extending in circumferential direction (w).

18. The drug delivery device according to claim 15, wherein the receptacle portion comprises the at least one bearing extending in a lateral plane (x, y) with respect to a tubular shape of cartridge holder and/or body.

19. The drug delivery device according to claim 18, wherein the bearing comprises at least one axial through opening to receive the latch element.

20. The drug delivery device according to claim 18, wherein the bearing (54) adjacently extends to an inside facing side wall section of the receptacle portion and comprises a central through opening to axially guide a piston rod of the drive mechanism.

21. The drug delivery device according to claim 15, wherein the latch element and the corresponding bearing are integrated in at least one longitudinally extending rib or groove of mutually engaging side wall sections of insert portion and receptacle portion of cartridge holder and body, respectively.

22. The drug delivery device according to claim 21, wherein the tongue and/or its latch element radially outwardly protrudes from a lateral side wall section of the insert portion.

23. The drug delivery device according to claim 21, wherein the bearing comprises at least one undercutting circumferentially extending in the groove and being adapted to mate with a spreading piece of the latch element extending in circumferential direction (w).

24. The drug delivery device according to claim 15, wherein side wall sections of the insert portion and/or of the receptacle portion comprise a closed surface structure, free of through openings.

25. The drug delivery device according to claim 14, wherein the interconnection is of non-releasable type.

26. The drug delivery device according to claim 14, further comprising a cartridge filled with a medicament disposed in the cartridge holder.