Safety shield system for a single use flexible-type compression syringe, and injection device

Patent metadata

Field	Value
Publication number	US-9623192-B2
Application number	US-201213354818-A
Country	US
Kind code	B2
Filing date	Jan 20, 2012
Priority date	Feb 7, 2007
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

A safety shield system ( 60 ) for a compression syringe ( 10 ) having a compressible reservoir ( 46 ), a needle cannula ( 12 ) for fluid communication with the reservoir ( 46 ) and having a forward tip ( 16 ), the safety shield system ( 60 ) having at least a holder shield portion ( 62 ) designed to be attached to the compression syringe ( 10 ), and a movable shield portion ( 64 ), designed to be movable relative to the compression syringe ( 10 ) from a first position wherein the tip ( 16 ) is exposed, to a second position wherein the movable shield portion ( 64 ) covers the tip ( 16 ). The holder shield portion ( 62 ) and movable shield portion ( 64 ) being provided with retainer ( 51, 52, 70 ) arranged to cooperate in the first position to prevent the movable shield portion ( 64 ) from moving toward its second position.

First claim

What is claimed is:

1. A safety shield system for a compression syringe having a compressible reservoir, a needle cannula for fluid communication with the reservoir and having a forward tip, the safety shield system comprising:
a holder shield portion designed to be attached to said compression syringe;
a movable shield portion, designed to be movable relative to said compression syringe from a first position wherein the tip is exposed, to a second position wherein said movable shield portion covers said tip;
said holder shield portion and movable shield portion being provided with one or more retaining elements arranged to cooperate in said first position to prevent said movable shield portion from moving toward its second position;
wherein a part of said one or more retaining elements is provided on a deflectable part connected to at least one of said holder shield portion or movable shield portion, said deflectable part being manually deflectable to directly compress the reservoir to expel a product out of the compression syringe, wherein manual deflection of said deflectable part further acts to disengage said one or more retaining elements and allow said movable shield portion to be moved toward its second position.

2. The safety shield system of claim 1 , wherein said movable shield portion is connected with said holder shield portion by a sliding connection allowing said movable shield portion to translate relating to said holder shield portion between said first and second positions.

3. The safety shield system of claim 2 , wherein one of said holder shield portion and said movable shield portion has at least one guide rail or a sliding part complementary to said guide rail, said guide rail and said sliding part defining said sliding connection.

4. The safety shield system of claim 1 , wherein said movable shield portion is connected with said holder shield portion by a pivoting connection allowing said movable shield portion to pivot relating to said holder shield portion between said first and second positions.

5. The safety shield system of claim 1 , wherein said each of said movable shield portion and holder shield portion comprises at least one abutment surface.

6. The safety shield system of claim 3 , wherein said movable shield portion and the holder shield portion are connected to each other by at least one frangible rib arranged to break upon compression of the deflectable part in a direction of the reservoir, said at least one frangible rib defining said one or more retaining elements.

7. The safety shield system of claim 1 , wherein at least part of said deflectable part is engageable with said reservoir when said safety shield system is assembled with a compression syringe in order to be able to, when said deflectable part is manually deflected, squeeze said reservoir to expel said product out of said compression syringe.

8. The safety shield system of claim 2 , wherein said sliding connection or a pivoting connection are arranged in order to limit friction between said movable shield portion and holder shield portion, to enable the free displacement of said movable shield portion toward the second position upon orienting a sharp pointed end toward the ground.

9. The safety shield system of claim 1 , further comprising a locking element arranged to lock said movable shield portion in said second position.

10. The safety shield system of claim 6 , wherein one of said holder shield portion and movable shield portion contains at least a first ramped notch and the other contains at least a first flexible catch arranged to be locked in said first ramped notch when said movable shield portion is in said first position to prevent said movable shield portion from moving from said first position.

11. The safety shield system of claim 9 , wherein one of said holder shield portion and movable shield portion contains at least a first ramped notch and a second ramped notch arranged to lock a catch when said movable shield portion is in said second position to prevent said movable shield portion from moving from said second to first ramped notch, said second notch and catch defining part of said locking element.

12. The safety shield system of claim 1 , further comprising an urging member positioned between said movable shield portion and said holder shield portion to urge said movable shield portion toward said second position.

13. The safety shield system of claim 9 , wherein said urging member is a spring.

14. The safety shield system of claim 1 , wherein the front portion of the movable shield portion defines an aperture through which the needle cannula extends when the safety shield system is assembled with a compression syringe and the movable shield portion is in the first position.

15. The safety shield system of claim 14 , wherein said movable shield portion defines a L shape, the small branch of said L shape comprising said aperture and the long branch of said L shape defining part of a connecting element.

16. The safety shield system of claim 1 , wherein said holder shield portion is provided with at least one gripping surface designed to be held by the user during operation of the safety shield system and/or of the compression syringe.

17. The safety shield system of claim 1 , wherein the front portion of the holder shield portion defines a port designed to receive a needle hub when said safety shield system is assembled with a compression syringe.

18. The safety shield system of claim 16 , wherein said holder shield portion has a U shape, one branch of said U shape defining a gripping surface, the other branch defining at least part of said connecting element, a basis of said U shape being formed by wings extending away from said port in opposite directions to said gripping surface and a connecting element.

19. The safety shield system of claim 15 , wherein the front portion of the holder shield portion is configured to receive a portion of the basis of said overall “U” shape when the movable shield portion is in the first position.

20. The safety shield system of claim 10 , wherein each of the first and second ramped notches consists of a substantially perpendicular back edge relative to the travel direction of the movable shield portion toward its second position, and a curved front wall, the curved front wall of the second one of the ramped notches causing movement of the catch out of the second one of the notches as the catch is moved from the second one of the notches to the first one of the notches.

21. The safety shield system of claim 20 , wherein said second ramped notches is coupled with at least one stop surface arranged to prevent said catch to move past said second position, said stop surface and catch defining part of said locking.

Assignees

• Chin Sin Fong
• Moh Yaohan Jon
• Sim Trong Yee
• Becton Dickinson Co

Inventors

• Chin Sin Fong
• Moh Yaohan Jon
• Sim Trong Yee

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

• A61M5/288

  by piercing without internal pressure increase (A61M5/283 takes precedence) · CPC title

• A61M2005/3247

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

• A61M5/3219

  Semi-automatic repositioning of the cap, i.e. in which the repositioning of the cap to the needle covering position requires a deliberate action by the user to trigger the repositioning of the cap, e.g. manual release of spring-biased cap repositioning means · CPC title

• A61M5/3216 Primary

  Caps placed transversally onto the needle, e.g. pivotally attached to the needle base · CPC title