Safety device for a hollow medical needle

Patent metadata

Field	Value
Publication number	US-9474880-B2
Application number	US-201013257572-A
Country	US
Kind code	B2
Filing date	May 5, 2010
Priority date	May 6, 2009
Publication date	Oct 25, 2016
Grant date	Oct 25, 2016

Abstract

The present disclosure relates to a set for producing a threaded connection, comprising a first and a second tubular component with an axis of revolution, one of their ends being provided with a threaded zone formed on the external or internal peripheral surface of the component depending on whether the threaded end is of the male or female type, said ends finishing in a terminal surface which is oriented radially with respect to the axis of revolution of the tubular components, a thread crest, a thread root, a load flank and a stabbing flank, the width of the thread crests of each tubular component reducing in the direction of the terminal surface of the tubular component under consideration, while the width of the thread roots increases, characterized in that the lead of the male stabbing flanks and/or load flanks is different from the lead of the female stabbing flanks and/or load flanks. The present method, system and device also pertain to a threaded connection.

First claim

The invention claimed is:

1. A needle safety assembly comprising:
a needle safety element slidably mounted in a catheter hub and on a needle shaft having a needle tip; the needle safety element comprising a proximal wall having an opening and two movable arms; the needle safety element being proximal of the needle tip in a ready position and covering the needle tip in a protective position;
a frame surrounding, at least in part, the needle safety element comprising a first stay and a second stay having distal ends and proximal ends and connected to a bracket at the distal ends and being fixedly attached at the proximal ends; and
wherein the frame and the needle safety element are displaced from the catheter hub in the protective position.

2. The needle safety assembly of claim 1 , further comprising a first lug connected to the first stay along a first axial position on the first stay and extends radially relative to the needle shaft.

3. The needle safety assembly of claim 2 , further comprising a second lug connected to the second stay along a first axial position on the second stay and extends radially relative to the needle shaft.

4. The needle safety assembly of claim 3 , wherein the first axial position on the first stay is located, relative to the needle shaft, at a different position than the first axial position on the second stay.

5. The needle safety assembly of claim 2 , wherein the first lug extends radially so that an end edge of the first lug is closer to the second stay than the first stay.

6. The needle safety assembly of claim 1 , wherein the bracket and the two stays are unitarily formed.

7. The needle safety assembly of claim 1 , wherein the two arms are attached to the proximal wall.

8. A method of forming a needle safety assembly use in a catheter hub, the method comprising:
placing a needle safety element in sliding communication with a needle shaft having a needle tip and into a catheter hub; said safety element comprising a proximal wall having an opening and two movable arms; said safety element covering the needle tip in a protective position;
surrounding, at least in part, said needle safety element with a frame; said frame comprising a first stay and a second stay having distal ends and proximal ends and connected to a bracket at the distal ends and being fixedly attached at the proximal ends; and
wherein the frame and the needle safety element are displaced from the catheter hub in the protective position.

9. The method of claim 8 , wherein the bracket, the two stays, and the proximal wall define two opposed rectangular openings.

10. The method of claim 8 , further comprising forming at least one lug on one of the first stay and the second stay to delimit rotation of the needle shaft relative to the frame.

11. The method of claim 10 , further comprising a second lug, and wherein the at least one lug and the second lug are offset in an axial direction.

12. The method of claim 8 , further comprising limiting displacement of the needle safety element by limiting movement of the needle tip to an area defined by the first stay and the second stay and two intersecting arms.

13. The method of claim 8 , further comprising bending the first stay and the second stay so that bent portions of the first stay and the second stay are parallel to the proximal wall.

14. The method of claim 8 , further comprising positioning the two movable arms of the needle safety element radially outside a space defined by the frame and moving the first arm and the second arm into the space defined by the frame.

15. The method of claim 8 , further comprising an extension on the bracket extending in a proximal direction.

16. The method of claim 8 , wherein the two movable arms are attached to the proximal wall.

17. A needle safety assembly comprising:
a needle safety element slidably mounted on a needle shaft having a needle tip, the needle safety element comprising:
a proximal wall having an opening;
a moveable distal wall; and
two movable arms which do not intersect and extend along opposite sides of the needle shaft;

a frame surrounding, at least in part, the needle safety element assembled from a first stay and a second stay connected to a bracket and the proximal wall, within which the two movable arms can move;
wherein the frame is located around the movable arms of the safety element; and
wherein the stays are joined to each other at the distal ends by the bracket.

18. Needle safety assembly according to claim 17 , wherein the stays extend laterally from the two arms of the needle safety element approximately parallel to the needle shaft.

19. The needle safety assembly according to claim 17 , wherein the bracket extends transversely to the needle axis.

20. The needle safety assembly according to claim 17 one of the preceding claims, wherein the stays are joined at the proximal end to the proximal rear wall.

21. The needle safety assembly according to claim 17 , wherein the first stay and the second stay are connected to the needle safety element.

22. The needle safety assembly according to claim 17 , wherein the stays of the frame are fixedly connected at their proximal ends with the proximal wall of the needle safety element.

23. The needle safety assembly according to claim 17 , further comprising protruding lugs formed on the proximal ends of the stays.

24. The needle safety assembly according to claim 17 , wherein at least one stay is integral with the proximal wall.

25. The needle safety assembly according to claim 17 , wherein the bracket and the stays are unitarily formed.

26. The needle safety assembly according to claim 17 , wherein the frame formed around the moveable arms of the needle safety element by the lateral stays and the bracket is formed from thin sheet metal by punching and bending.

27. The needle safety assembly according to claim 17 , wherein needle safety element comprises two resilient arms extending from the proximal wall in the distal direction, both arms being provided with a distal end portion opposite each other, the moveable distal wall being provided on the distal end portion of each of the resilient arms.

28. The needle safety assembly according to claim 17 , wherein the distal end portions of the arms abut on the needle shaft in the ready position.

29. The needle safety assembly according to claim 27 , wherein the distal end portions of the arms cover the needle tip in the protective position.

30. The needle safety assembly according to claim 17 , wherein the stays have a curved cross-section or have inwardly bent edges in the sectional view.

Assignees

• Woehr Kevin
• Riesenberger Hermann
• Lugan Meinrad
• Braun Melsungen Ag

Inventors

• Woehr Kevin
• Riesenberger Hermann
• Lugan Meinrad

Classifications

• A61M25/0097

  characterised by the hub (connectors A61M39/10) · CPC title

• A61M5/158

  Needles {for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body} · CPC title

• A61M25/0618 Primary

  having means for protecting only the distal tip of the needle, e.g. a needle guard · CPC title

• A61M5/3273

  freely sliding on needle shaft without connection to syringe or needle · CPC title

• A61M2005/325

  Means obstructing the needle passage at distal end of a needle protection sleeve · CPC title