Needle safety device

Patent metadata

Field	Value
Publication number	US-9320857-B2
Application number	US-201214346384-A
Country	US
Kind code	B2
Filing date	Sep 20, 2012
Priority date	Sep 23, 2011
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

Described is a needle safety device comprising a needle hub adapted to couple to an injection device a needle coupled to the needle hub and having a distal tip, a needle shield telescopically coupled to the needle hub and including a biasing element, and a locking element arranged on the needle hub. When the needle shield is in a first axial position, the needle shield covers the distal tip of the needle. When the needle shield is in a second axial position, the needle shield moves proximally relative to the needle hub to expose the distal tip of the needle and the locking element deflects the biasing element. When the needle shield is in a third axial position, the locking element engages the biasing element and the needle shield covers the distal tip of the needle.

First claim

The invention claimed is:

1. A needle safety device comprising:
a needle hub adapted to couple to an injection device;
a needle coupled to the needle hub, the needle having a distal tip;
a needle shield telescopically coupled to the needle hub with a biasing element coupled to a distal portion of the needle shield; and
a locking element arranged on the needle hub,
wherein, when the needle shield is in a first axial position, the needle shield covers the distal tip of the needle,
wherein, when the needle shield is in a second axial position, the needle shield moves proximally relative to the needle hub to expose the distal tip of the needle and the locking element directly deflects the biasing element, and
wherein, when the needle shield is in a third axial position, the locking element engages the biasing element and the needle shield covers the distal tip of the needle.

2. The needle safety device according to claim 1 , wherein the needle hub includes a mounting element for coupling to the injection device.

3. The needle safety device according to claim 2 , wherein the mounting element includes an inner wall adapted to engage the injection device and an outer wall, with a slot formed between the inner wall and the outer wall.

4. The needle safety device according to claim 3 , wherein a proximal end of the needle shield is contained in the slot.

5. The needle safety device according to claim 4 , wherein a compression spring is disposed in the slot.

6. The needle safety device according to claim 1 , wherein the locking element includes an arm and a locking tab.

7. The needle safety device according to claim 6 , wherein the biasing element includes a resilient beam extending axially within the needle shield.

8. The needle safety device according to claim 7 , wherein the resilient beam includes a locking recess adapted to engage the locking tab.

9. The needle safety device according to claim 8 , wherein a proximal end of the resilient beam includes a pocket adapted to engage the locking tab to prevent proximal movement of the needle shield relative to the needle hub when the needle shield is in the third axial position.

Assignees

• Sanofi Aventis Deutschland

Inventors

• Ward Chris
• Slemmen John

Classifications

• A61M5/3257 Primary

  Semi-automatic sleeve extension, i.e. in which triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension means · CPC title

• A61M5/3243

  being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel (devices for protecting guide needles in combination with catheters A61M25/0612) · CPC title

• A61M2005/3258

  being compressible or compressed along the needle · CPC title

• A61M5/3271

  with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position · CPC title