Assembly for an autoinjector device

Patent metadata

Field	Value
Publication number	US-2016175531-A1
Application number	US-201414909689-A
Country	US
Kind code	A1
Filing date	Aug 4, 2014
Priority date	Aug 2, 2013
Publication date	Jun 23, 2016
Grant date	—

Abstract

An assembly for an auto injector device, the assembly including a syringe support for supporting a syringe by limiting forward axial movement of the syringe relative to the syringe support, and a guard element attachable to the syringe support by an attachment so that the guard element is axially restrained both axially forwardly and axially rearwardly relative to the syringe support by the attachment. Forwardly directed axial loads received by the guard element are transmitted to the syringe support via the attachment.

First claim

1 . An assembly for an autoinjector device, the assembly including:
a syringe support for supporting a syringe by limiting forward axial movement of the syringe relative to the syringe support; and a guard element attachable to the syringe support by an attachment so that the guard element is axially restrained both axially forwardly and axially rearwardly relative to the syringe support by the attachment; wherein forwardly directed axial loads received by the guard element are transmitted to the syringe support via the attachment.

2 . An assembly according to claim 1 , wherein the guard element is attachable to a rear end of the syringe support.

3 . An assembly according to claim 1 , wherein the attachment includes first abutment features on the syringe support and second abutment features on the guard element, and forward axial movement of the guard element relative to the syringe support is limited by the abutment of the first and second abutment features.

4 . An assembly according to claim 3 , wherein said second abutment features of said guard element include a plurality of axially forwardly extending legs, and said first abutment features of said syringe support include an external flange, and forward axial movement of the guard element relative to the syringe support is limited by abutment of said plurality of axially forwardly extending legs against said external flange.

5 . An assembly according to claim 4 , wherein said plurality of axially forwardly extending legs form part of at least a pair of clasps, where each clasp includes a pair of said axially forwardly extending legs and a front cross beam extending circumferentially to connect the two legs of each pair of axially forwardly extending legs.

6 . An assembly according to claim 5 , wherein each of said front cross beams forms the axially forwardmost portion of each respective clasp.

7 . An assembly according to claim 6 , wherein an axially forwardly facing surface of each front cross beam is tapered, the axially forwardly facing surface extending axially rearwardly in a radially outward direction, and an axially rearwardly facing surface of said external flange is also tapered in at least parts, the axially rearwardly facing surface of said parts extending axially rearwardly in a radially outward direction so as to be complementary to the axially forwardly facing surface of each front cross beam.

8 . An assembly according to claim 5 , wherein the attachment includes third abutment features on the syringe support and fourth abutment features on the guard element and rearward axial movement of the guard element relative to the syringe support is limited by the abutment of the third and fourth abutment features.

9 . An assembly according to claim 8 , wherein said third abutment features of said syringe support include outwardly radially extending elbows and said fourth abutment features of said guard element include said first cross beams and rearward axial movement of the guard element relative to the syringe support is limited by the abutment of the elbows against said first cross beams.

10 . An assembly according to claim 9 , wherein axially rearwardly extending legs extend from said elbows.

11 . An assembly according to claim 10 , wherein said first cross beams have a recessed portion for facilitating assembly of the first cross beams over the axially rearwardly extending legs of said syringe support.

12 . An assembly according to claim 9 , wherein said clasps each include a second cross beam that extends circumferentially to connect the two legs of each pair of axially forwardly extending legs, each second cross beam being axially rearward and axially spaced from the respective first cross beam.

13 . An assembly according to claim 5 , wherein the attachment includes hooks on the syringe support that are configured to latch onto the guard element and limit rearward axial movement of the guard element relative to the syringe support.

14 . An assembly according to claim 13 , wherein each of said hooks is disposed on an axially rearwardly extending leg of said syringe support.

15 . An assembly according to claim 5 , wherein the legs of each of said pair of axially forwardly extending legs of each clasp are circumferentially spaced to receive one of said axially rearwardly extending legs of said syringe support.

16 . An assembly according to claim 15 , wherein said first cross beams have a recessed portion for facilitating assembly of the first cross beams over the axially rearwardly extending legs of said syringe support.

17 . An assembly according to claim 1 , wherein the guard element defines an axially rearward surface for receiving axial drive.

18 . An assembly according to claim 17 , wherein the axially rearward surface for receiving axial drive is an axially rearward surface of a flange.

19 . An assembly according to claim 18 , wherein said guard element defines a central bore extending in an axial direction and the flange extends radially outwardly from the bore.

20 . An assembly according to claim 19 , wherein the axially rearward facing surface of the flange slopes axially forwardly along radial directions away from said bore.

21 . An assembly according to claim 18 , wherein said axially rearward facing surface of said flange corresponds to part of the surface of a conic frustum.

22 . An assembly according to claim 19 , wherein said guard element further comprises locating features for co-axially aligning the guard element with the rear end of a syringe.

23 . An assembly according to claim 21 , wherein said locating features comprise an axially forwardly extending spigot extending from the axially forwardly facing surface of the flange, the spigot defining part of said bore.

24 . An assembly according to claim 23 , wherein the guard element is assembled on said syringe support.

25 . An assembly according to claim 24 , further comprising a syringe supported by said syringe support, wherein at least part of said guard element is axially rearward of at least part of said syringe.

26 . An assembly according to claim 25 , wherein said syringe comprises a barrel having an outlet at a forward end, a needle fluidly connected to said outlet, an open rear end, a plunger element moveable within said barrel, a plunger rod connected to said plunger element for moving said plunger element within said barrel, and a rear syringe flange extending radially outwardly from a rear end of the barrel.

27 . An assembly according to claim 26 , wherein an axially forwardly facing side of the guard element is shaped so as to be complementary to the profile of the rear syringe flange.

28 . An assembly according to claim 26 , wherein the spigot is shaped so as to be complementary to the profile of the open rear end of the barrel.

29 . An assembly according to claim 25 , wherein the syringe contains a liquid drug formulation.

30 . An assembly according to claim 29 , wherein the barrel of said syringe has a volume corresponding to a single dose of said liquid drug formulation.

31 . An assembly according to claim 29 , wherein the liquid drug formulation comprises an aqueous formulation of a therapeutic biologic type drug.

32 . An autoinjector device including the assembly of claim 24 .

Assignees

• Bespak Europ Ltd
• Ucb Biopharma Sprl

Inventors

• Mcloughlin Martin John
• Darnell Ian
• Ekman Matt
• Anderson Ian
• Cammish Neil Bentley

Classifications

• A61M5/2033

  Spring-loaded one-shot injectors with or without automatic needle insertion (multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287) · CPC title

• A61M5/20 Primary

  Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically (A61M5/142 {, A61M5/46} take precedence; {hypodermic projectiles F42B12/54}) · CPC title

• A61M5/24

  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 title

• A61M2205/19

  Constructional features of carpules, syringes or blisters · CPC title

• A61M2005/2418

  comprising means for damping shocks on ampoule · CPC title