Safety device for a pre-filled syringe and injection device

Patent metadata

Field	Value
Publication number	US-10512733-B2
Application number	US-201916352398-A
Country	US
Kind code	B2
Filing date	Mar 13, 2019
Priority date	Jul 2, 2010
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

According to the invention a safety device for a pre-filled syringe comprises a substantially cylindrical and hollow support body and a hollow needle shield slideably arranged relative to the support body. The support body comprises at least one resilient arm and the hollow needle shield or a needle shield assembly comprises at least one curved actuation ramp. The curved actuation ramp protrudes in a lateral direction (L) perpendicular to a central axis (A) of the safety device. The curved actuation ramp comprises a first lateral dimension (L1) at a proximal end of the needle shield and a second lateral dimension (L2) exceeding the first lateral dimension (L1) at a distal end of the needle shield. The resilient arm engages the curved actuation ramp when the needle shield is slid relative to the support body.

First claim

The invention claimed is:

1. A drug injection device comprising:
a first body portion defining a cavity configured to receive a syringe, the first body portion comprising a first locking feature;
a second body portion that is distally slideable with respect to the first body portion, the second body portion configured to receive part of the first body portion when the second body portion is slid distally with respect to the first body portion, the second body portion comprising a plunger extending distally from a proximal end portion of the second body portion, the plunger being configured to extend into the cavity of the first body portion when the second body portion is slid distally with respect to the first body portion, and the second body portion comprising a second locking feature configured to engage the first locking feature of the first body portion when the second body portion is slid distally a certain distance with respect to the first body portion, wherein axial movement of the first and second body portions relative to one another is limited when the first and second locking features are engaged;
a needle shield that is slideable with respect to the first body portion between an extended position and a retracted position; and
a needle cap remover that is configured to grasp a needle cap that covers a needle of the syringe when the syringe is disposed in the cavity of the first body portion.

2. The drug injection device of claim 1 , wherein the needle shield is configured to slide into at least part of the first body portion, and the second body portion is configured to slide over at least part of the first body portion.

3. The drug injection device of claim 1 , wherein one of the first and second locking features is a radially protruding catch and the other of the first and second locking features is a surface defining a recess configured to receive the radially protruding catch.

4. The drug injection device of claim 3 , wherein the second locking feature is the radially protruding catch and the first locking feature is the surface defining the recess configured to receive the radially protruding catch.

5. The drug injection device of claim 4 , wherein the radially protruding catch extends radially inward from a clamp arm of the second body portion.

6. The drug injection device of claim 5 , wherein the surface defining the recess configured to receive the radially protruding catch is located along an outer surface of the first body portion.

7. The drug injection device of claim 1 , wherein the second body portion comprises a clamp arm forming the second locking feature.

8. The drug injection device of claim 7 , wherein the second locking feature is a catch that extends radially inward from the clamp arm.

9. The drug injection device of claim 7 , wherein the first body portion comprises a recess forming the first locking feature.

10. The drug injection device of claim 1 , wherein the first and second locking features are configured to engage one another when the second body portion has been slid distally a sufficient distance to deliver a dose of drug.

11. The drug injection device of claim 1 , further comprising the syringe disposed in the cavity of the first body portion.

12. The drug injection device of claim 11 , wherein the syringe contains a drug.

13. The drug injection device of claim 11 , wherein the needle shield is configured to cover a needle of the syringe when the needle shield is in the extended position and is configured to expose the needle of the syringe when the needle shield is in the retracted position.

14. The drug injection device of claim 1 , wherein the needle shield comprises a hollow tubular member.

15. The drug injection device of claim 1 , wherein the needle shield comprises a distal flange portion configured to be pressed against skin of a patient during a drug injection.

16. The drug injection device of claim 15 , wherein the distal flange portion of the needle shield extends radially outward from another portion of the needle shield.

17. The drug injection device of claim 1 , wherein the needle cap remover comprises a portion configured to extend through a central opening of the needle shield.

18. The drug injection device of claim 17 , wherein the central opening is in a distal flange of the needle shield.

19. The drug injection device of claim 1 , wherein the needle cap remover is configured to remove the needle cap from the needle of the syringe when the needle cap is pulled distally.

20. The drug injection device of claim 1 , wherein the plunger is configured to contact a stopper in the syringe when the syringe is disposed in the cavity of the first body portion and the second body portion is slid distally with respect to the first body portion.

21. The drug injection device of claim 20 , wherein the plunger is configured to distally advance the stopper in the syringe to eject drug from the syringe when the syringe is disposed in the cavity of the first body portion and the second body portion is slid distally with respect to the first body portion.

22. The drug injection device of claim 1 , wherein the plunger is integrally formed with the proximal end region of the second body portion.

23. The drug injection device of claim 1 , wherein the second body portion defines a slot configured to receive a projection extending from a flexible arm of the first body portion.

24. The drug injection device of claim 23 , wherein the projection extends radially outward from the flexible arm.

25. The drug injection device of claim 1 , wherein the first body portion defines an opening and comprises a flexible arm extending axially within the opening.

26. The drug injection device of claim 25 , wherein the flexible arm is configured to deflect laterally as the needle shield is slid with respect to the first body portion toward the retracted position.

27. The drug injection device of claim 25 , wherein the needle shield defines an opening and comprises a flexible arm extending axially within the opening.

28. The drug injection device of claim 27 , wherein the flexible arm of the first body portion is configured to engage the flexible arm of the needle shield such that both of the flexible arms deflect laterally as the needle shield is slid with respect to the first body portion toward the retracted position.

29. A drug injection device comprising:
a first body portion defining a cavity configured to receive a syringe;
a second body portion that is distally slideable with respect to the first body portion, the second body portion configured to receive part of the first body portion when the second body portion is slid distally with respect to the first body portion, the second body portion comprising a plunger extending distally from a proximal end portion of the second body portion, the plunger being configured to extend into the cavity of the first body portion when the second body portion is slid distally with respect to the first body portion,
means for locking the second body portion to the first body portion when the first body portion is slid distally with respect to the first body portion;
a needle shield that is slideable with respect to the first body portion between an extended position and a retracted position; and
a needle cap remover that is configured to grasp a needle cap that covers a needle of

Assignees

• Sanofi Aventis Deutschland

Inventors

• Roberts Gareth
• Ward Chris
• Ekman Matthew

Classifications

• A61M5/3205

  Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles (for sharps A61B50/362; disintegrating apparatus in general B02C, e.g. B02C19/0075, B23H9/001; disposal of medical waste in general B09B3/00; receptacles for refuse disposal in general B65F1/00) · CPC title

• A61M5/3272

  having projections following labyrinth paths · CPC title

• A61M5/3204

  Needle cap remover, i.e. devices to dislodge protection cover from needle or needle hub, e.g. deshielding devices · CPC title

• A61M5/3287

  Accessories for bringing the needle into the body; Automatic needle insertion (A61M5/20, A61M5/31525 take precedence) · CPC title

• A61M5/3202 Primary

  Devices for protection of the needle before use, e.g. caps (A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001) · CPC title