SYRINGE DEVICE COMPRISING A SYRINGE BODY AND A BEARING SLEEVE

• US 20100217205A1
• Filed: 10/22/2008
• Published: 08/26/2010
• Est. Priority Date: 10/23/2007
• Status: Active Grant

• Current Assignee: Tech Group Europe Limited (West Pharmaceutical Services Incorporated)
• Original Assignee: Tech Group Europe Limited (West Pharmaceutical Services Incorporated)
• Inventors: Chavellier, Jean-Michel, Chevallier, Stephane
• Granted Patent: US 9,220,848 B2
• Time in Patent Office: Days
• US Class Current: 604/198
• CPC Class Codes: A61M 2005/3238 Trigger provided at the proximal end, i.e. syringe end opposite to needle mounting end
• CPC Class Codes: A61M 2005/3261 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 Class Codes: A61M 5/3129 Syringe barrels A61M5/3205 and A61M5/50 take precedence
• CPC Class Codes: A61M 5/3135 characterised by constructional features of the proximal end
• CPC Class Codes: A61M 5/326 Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user

Abstract

The invention relates to a device comprising a syringe body (10) having an axial direction (A) and a bearing sleeve (18) inside which the body is arranged. The sleeve has at least one holding lug (22) co-operating with the syringe body, at a proximal end (10A) of the latter, in order to hold the body in relation to the sleeve. Said proximal end is fixed to a wedging surface (42) having radial crenulations forming dips (42B) and bumps (42A) and the holding lug is inserted into a dip in order to prevent a relative rotation of the syringe body (10) and the sleeve perpendicularly to the axial direction.

Claims

1-10. -10. (canceled)

11. A syringe device comprising:

a syringe body (10;

10′

;

10″

) having a central axis (A), and

a bearing sleeve (18) inside which is placed the syringe body, the sleeve having at least one holding lug (22) co-operating with the syringe body at a proximal end (10A, 10′

A, 10″

A) of the syringe body, in order to hold the said body in relation to the sleeve,

wherein;

the proximal end of the syringe body cooperates with an uneven wedging surface (42;

42′

;

42″

) having radial recessed portions (42B;

42′

B;

42″

B) and raised portions (42A;

42′

A;

42″

A); and

the holding lug (22) is able to be inserted in a recessed portion to prevent rotation of the syringe body (10;

10′

) relative to the bearing sleeve (18).

12. The device according to claim 11, wherein the syringe body has a flange (14, 14′

) at the proximal end of the said body, the wedging surface (42, 42′

) being at a proximal end (14A, 14′

A) of the flange.

13. The device according to claim 12, wherein the wedging surface (42′

) is formed integrally with the flange (14′

) of the syringe body (10′

).

14. The device according to claim 11, further comprising a wedging part (40;

40′

;

40″

) connectable to the proximal end (10A;

10″

A) of the syringe body (10;

10″

) to form the wedging surface.

15. The device according to claim 14, wherein the wedging surface is created on a flange part (42;

42″

) of the wedging part (40;

40′

;

40″

), extending radially outwardly beyond a cylindrical wall (11) of the syringe body (10;

10″

).

16. The device according to the claim 15, wherein the flange part (42) of the wedging part (40;

40′

) has radially-extending strips (42A) forming the raised portions on the wedging surface, and the strips are separated by indentations (42B) forming the recessed portions of the wedging surface.

17. The device according the claim 15, wherein at least one of the holding lug (22) and the flange part (42) is elastically flexible.

18. The device according to claim 14, wherein the wedging part (40;

40′

;

40″

) has a tubular axial part (44;

44′

;

44″

) sized and shaped to be inserted in the syringe body (10;

10″

), starting from the proximal end (10A;

10″

A) of the syringe body.

19. The device according to claim 18, wherein the tubular axial part (44′

;

44″

) has crenulations (45).

20. The device according to claim 11, further comprising a protection sleeve (24), the protection sleeve and the bearing sleeve (18) being able to slide one in relation to the other between a standby setting where a needle (16) placed at the distal end (10B) of the syringe body (10;

10′

) may protrude in relation to the protection sleeve (24) and a protection setting, where the needle (16) is able to be surrounded by the protection sleeve (24).