NEEDLE SHIELD ARRANGEMENT

• US 20130204197A1
• Filed: 10/11/2011
• Published: 08/08/2013
• Est. Priority Date: 10/12/2010
• Status: Active Grant

• Current Assignee: Owen Mumford
• Original Assignee: Owen Mumford
• Inventors: Bicknell, Stephen, Marshall, Jeremy
• Granted Patent: US 9,545,484 B2
• Time in Patent Office: Days
• US Class Current: 604/197
• CPC Class Codes: A61M 2005/206 With automatic needle insertion
• CPC Class Codes: A61M 2005/312 comprising sealing means, e.g. severable caps, to be removed prior to injection by, e.g. tearing or twisting
• CPC Class Codes: A61M 5/20 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 Class Codes: A61M 5/3202 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 Class Codes: A61M 5/3204 Needle cap remover, i.e. devices to dislodge protection cover from needle or needle hub, e.g. deshielding devices
• CPC Class Codes: A61M 5/343 Connection of needle cannula to needle hub, or directly to syringe nozzle without a needle hub A61M5/322 takes precedence

Abstract

A needle shield arrangement for a syringe (10), having a generally cylindrical body with a needle (16) at its forward end, includes a shield portion (20) adapted for shielding the needle (16); a syringe engaging portion (22) for engagement with the syringe body, and a frangible connecting portion (24) connecting the shield portion and the syringe engagement portion.

Claims

1-11. -11. (canceled)

12. A needle shield arrangement for a syringe (10), the syringe having a generally cylindrical body with a needle (16) at its forward end, the arrangement comprising:

a shield portion (20) adapted for shielding said needle (16);

a syringe engaging portion (22) for engagement with said syringe body, and

a frangible connecting portion (24) connecting said shield portion and said syringe engagement portion.

13. A needle shield arrangement according to claim 12, wherein said syringe engaging portion (22) is adapted to engage a forward end portion of the syringe.

14. A needle shield arrangement according to claim 13, wherein said syringe body is formed with a forward facing circumferential shoulder (30) at its forward end, and said syringe engagement portion (22) is complimentarily shaped to engage said shoulder.

15. A needle shield arrangement according to claim 13, wherein said syringe engaging portion (22) is adapted slideably to receive a forward end of a syringe body.

16. A needle shield arrangement according to claim 12, wherein said shield portion (20) and said syringe engaging portion (22) are each solids of revolution about a longitudinal axis, and said frangible connecting portion comprises a concentric plurality of frangible tabs (24) connecting said shield portion and said syringe engaging portion.

17. A needle shield arrangement according to claim 12, wherein an outer peripheral portion of at least one of the shield portion (20) and the syringe engaging portion (22) is non-circular, thereby in use allowing non-rotational engagement with an outer component.

18. An injection apparatus comprising:

an elongate housing (32);

a syringe (10) mounted in said housing for longitudinal movement and having a generally cylindrical body with a needle (16) at its forward end;

a shield arrangement comprising;

a shield portion (20) adapted to shield said needle (16), and

a syringe engaging portion (22) for engagement with said syringe body;

the apparatus including a stop surface (34;

36) for arresting forward movement of said syringe beyond a forward position,

wherein at least part of the arresting load is transmitted to said syringe via said syringe engaging portion (22).

19. An injection apparatus according to claim 18, which includes a frangible connecting portion (24) connecting said shield portion and said syringe engaging portion.

20. An injection apparatus according to claim 18 wherein said syringe body is formed with a flange (12) at its rearward end and said syringe engaging portion engages said syringe body at a location spaced forwardly of said flange (12).

21. An injection apparatus according to claim 19, wherein a region of the syringe engaging portion (22) is in non-rotational engagement with said housing (32), and thereby prevented from rotation with respect thereto.

22. An injection apparatus according to claim 18, including a cap (38) fitted into the forward end of the housing (32) and adapted to engage and remove the shield portion (20) upon withdrawal of the cap from the forward end of the housing, and a region of the shield portion is in non-rotational engagement with said cap, whereby rotary motion applied to said cap is transmitted to said shield portion.

24. An injection apparatus according to claim 19, including a cap (38) fitted into the forward end of the housing (32) and adapted to engage and remove the shield portion (20) upon withdrawal of the cap from the forward end of the housing, and a region of the shield portion is in non-rotational engagement with said cap, whereby rotary motion applied to said cap is transmitted to said shield portion.

25. An injection apparatus according to claim 20, including a cap (38) fitted into the forward end of the housing (32) and adapted to engage and remove the shield portion (20) upon withdrawal of the cap from the forward end of the housing, and a region of the shield portion is in non-rotational engagement with said cap, whereby rotary motion applied to said cap is transmitted to said shield portion.

23. A method of assembly of an injection device which comprises applying a needle shield arrangement according to claim to the forward end of a syringe (10) and thereafter introducing the syringe (10) and needle shield arrangement forwardly into the rear end of a generally tubular housing portion (32) having a cap (38) removably attached to the front end thereof to cause the shield portion (20) to be captured by said cap, whereby removal of said cap removes said shield portion leaving said syringe engaging portion (22) adjacent said syringe body.