Needle shield for a glass syringe

• US 20050038391A1
• Filed: 08/02/2004
• Published: 02/17/2005
• Est. Priority Date: 08/01/2003
• Status: Active Grant

• Current Assignee: Gerresheimer Buende GmbH (Gerresheimer AG)
• Original Assignee: Bunder Glas GmbH
• Inventors: Stohlmann, Erhard, Wittland, Frank
• Granted Patent: US 7,387,617 B2
• Time in Patent Office: Days
• US Class Current: 604/192
• CPC Class Codes: A61L 2/20 Gaseous substances, e.g. vapours
• CPC Class Codes: A61M 2005/3109 Caps sealing the needle bore by use of, e.g. air-hardening adhesive, elastomer or epoxy resin
• CPC Class Codes: A61M 5/001 Apparatus specially adapted for cleaning or sterilising syringes or needles
• 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

Abstract

The closure stopper (3) and the elastic retaining element (5) are made of gas-permeable material, so that sterilizing gases can penetrate by means of permeation. The closure stopper (3) consists of a pharmaceutical rubber. In one variant, the closure stopper (3), the retaining element (5) and the protective element (7) are made in one piece, with longitudinally extending gas delivery slits (33) arranged between the protective element (7) and the closure stopper (3).

Claims

1-15. -15. (canceled).

16. A needle guard for a glass syringe, the needle guard comprising:

a closure stopper;

a retaining element having a substantially hollow cylinder shape and an opening formed therein for receiving a portion of a syringe body of the glass syringe; and

a protective element having a substantially hollow cylinder shape and receiving a portion of said retaining element and said closure stopper, said closure stopper and said retaining element made of an elastic material and said protective element made of a harder material being harder than said elastic material, said closure stopper and said retaining element made of a gas-permeable material permeable to a gas used for sterilization.

17. The needle guard according to claim 16, wherein said retaining element is formed of thermoplastic elastomer TPE-V, and said protective element is formed of thermoplastic PP for forming a permanent connection.

18. The needle guard according to claim 16, wherein said protective element has openings formed therein at a level of said closure stopper.

19. The needle guard according to claim 16, wherein said closure stopper is made of a pharmaceutical rubber.

20. The needle guard according to claim 16, wherein said closure stopper is made of a material selected from the group consisting of SBR, NBR, BIIR and CIIR.

21. The needle guard according to claim 16, wherein said protective element has a longitudinal axis and apertures formed therein extending transversely with respect to said longitudinal axis and disposed at a level of an upper limit of the syringe body, at a start of a syringe cone.

22. The needle guard according to claim 16, wherein said closure stopper, said retaining element and said protective element form a one-piece unit, said one-piece unit having longitudinally extending gas delivery slits formed between said protective element and said closure stopper.

23. The needle guard according to claim 22, wherein underneath said gas delivery slits, said retaining element is guided partially through said protective element as far as an outer limit of said protective element.

24. The needle guard according to claim 16, wherein said retaining element has an outside wall with steps formed thereon.

25. The needle guard according to claim 16, wherein said retaining element has a first catch element that can be locked together with a second catch element of the syringe body.

26. The needle guard according to claim 25, wherein said first catch element of said retaining element is formed as an inwardly directed annular bead, and the second catch element of the syringe body is formed by an annular widening or recess.

27. The needle guard according to claim 25, wherein said first catch element of said retaining element can be separated from said retaining element upon removal of the needle guard from the glass syringe.

28. The needle guard according to claim 25, wherein said retaining element has at least one predetermined breaking point.

29. The needle guard according to claim 28, wherein said predetermined breaking point is formed about a circumference of said retaining element.

30. The needle guard according to claim 28, wherein said predetermined breaking point adjoins said first catch element of said retaining element.