Safety device for a pre-filled injection syringe

Patent metadata

Field	Value
Publication number	US-10688254-B2
Application number	US-201816109409-A
Country	US
Kind code	B2
Filing date	Aug 22, 2018
Priority date	Apr 28, 2010
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A safety device for an injection syringe including a syringe support, a protective sheath for protecting an injection needle carried by the syringe, the sheath being mounted to slide relative to the syringe support between an injection position in which the needle is uncovered, and a protection position in which the needle is covered, the sheath having an initial grip surface enabling the device to be gripped by a user, and a return spring for urging the sheath into the protection position. The sheath also includes an extender member for extending the initial grip surface and fitted on the sheath in such a manner as to present a larger grip surface, referred to as an enlarged grip surface.

First claim

What is claimed is:

1. A safety device for an injection syringe, the safety device comprising:
a syringe support;
a protective sheath for protecting an injection needle carried by the injection syringe, the protective sheath being mounted to slide relative to said syringe support between an injection position in which the needle is uncovered, and a protection position in which the needle is covered, the protective sheath having an initial grip surface enabling the device to be gripped by a user, the initial grip surface being a projection that extends outward from the protective sheath in a radial plane substantially perpendicular to a longitudinal axis of the device; and
a return spring for urging the protective sheath into the protection position;
wherein the protective sheath also includes an extender member for extending the initial grip surface, being a separate piece from the protective sheath, attached to the protective sheath in such a manner as to present an enlarged grip surface, larger than the initial grip surface;
wherein the extender member engages around an outer edge of the initial grip surface.

2. The device according to claim 1 wherein the extender member comprises an annular skirt projecting from the extender member.

3. The device according to claim 2 , wherein the spring is in a compressed configuration when the protective sheath is in the injection position, and wherein the annular skirt masks the spring in the compressed configuration.

4. The device according to claim 2 , wherein the protective sheath includes a mechanism for preventing the protective sheath from moving in the protection position, and the annular skirt covers said mechanism for preventing the protective sheath from moving.

5. The device according to claim 4 , wherein the mechanism for preventing the protective sheath from moving in the protection position is a snap-fastener.

6. The device according to claim 4 , wherein the mechanism for preventing the protective sheath from moving in the protection position is slots which engage with lugs on said syringe support.

7. The device according to claim 2 , wherein the annular skirt extends in a longitudinal direction to a distal end of the device, so as to cover all of the needle of the syringe when the protective sheath is in the protection position.

8. The device according to claim 7 , wherein the annular skirt comprises a main tubular portion and a distal end with a diameter that decreases relative to a diameter of the main tubular portion.

9. The device according to claim 1 , wherein the extender member has two opposite radial ends, said ends being curved towards the longitudinal axis and a distal end of the device.

10. The device according to claim 1 , wherein the enlarged grip surface includes anti-skid portions.

11. The device according to claim 1 , wherein the extender member has two opposite radial ends that are rounded and connected together by two opposite flat sides.

12. The device according to claim 1 , including a tamperproofing sleeve fastened to the device by a breakable connection.

13. The device according to claim 12 , wherein the breakable connection is integrally molded with the extender member.

14. An assembly of the safety device according to claim 1 and the injection syringe comprising a pre-filled syringe.

15. A method of assembling the device according to claim 1 , wherein a portion of the protective sheath is initially assembled with said syringe support, after which the extender member is fitted on said portion of the protective sheath.

16. The device according to claim 1 , wherein the extender member surrounds the outer edge of the initial grip surface.

17. The device according to claim 1 , wherein the extender member engages the outer edge of the initial grip surface via fastener lugs on the extender member.

18. The device according to claim 1 , wherein the extender member includes a cavity which receives the initial grip surface and extends around the outer edge of the initial grip surface.

19. The device according to claim 1 , wherein the initial grip surface comprises at least two diametrically opposite portions in a form of grip flanges.

20. The device according to claim 1 , wherein the initial grip surface is in a form of a circular collar extending around the protective sheath and lying in the radial plane.

Assignees

• Nemera La Verpilliere S A S
• Nemera La Verpilliere

Inventors

• Dugand Pascal
• Lanzi Sylvain

Classifications

• A61M5/326

  Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user · CPC title

• A61M2005/3261

  triggered by radial deflection of the anchoring parts between sleeve and syringe barrel, e.g. spreading of sleeve retaining hooks having slanted surfaces by engagement with conically shaped collet of the piston rod during the last portion of the injection stroke of the plunger · CPC title

• A61M2005/3264

  Trigger provided at the proximal end, i.e. syringe end opposite to needle mounting end · CPC title

• A61M2005/3247

  Means to impede repositioning of protection sleeve from needle covering to needle uncovering position · CPC title

• A61M5/3137

  Specially designed finger grip means, e.g. for easy manipulation of the syringe rod · CPC title