PROTECTION DEVICE FOR PROTECTING AN INJECTION NEEDLE

• US 20090024093A1
• Filed: 04/20/2006
• Published: 01/22/2009
• Est. Priority Date: 04/20/2005
• Status: Active Grant

• Current Assignee: Becton Dickinson France (Becton, Dickinson & Co)
• Original Assignee: Becton Dickinson France (Becton, Dickinson & Co)
• Inventors: Barrelle, Laurent, Carrel, Franck
• Granted Patent: US 9,457,157 B2
• Time in Patent Office: Days
• US Class Current: 604/198
• CPC Class Codes: A61M 2005/3267 Biased sleeves where the needle is uncovered by insertion of the needle into a patient's body
• 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
• CPC Class Codes: A61M 5/3272 having projections following labyrinth paths
• CPC Class Codes: A61M 5/36 with means for eliminating or preventing injection or infusion of air into body dialysis systems, blood oxygenators A61M1/14; haemofiltration equipment A61M1/34; automatic tube cut-off A61M39/281

Abstract

The present invention relates to a protection device (1) intended to at least partially cover the needle (2) of an injection device, comprising:

• • a support (3) of the protection device (1),
  • a sleeve (4) movable axially in translation with respect to the support (3),
  • means (14) for returning the sleeve (4) from an injection position to a protection position,
  • axial guidance means (29, 30) for preventing the sleeve (4) from pivoting with respect to the said support (3),
  • one peg (6) directly and at least elastically, coupled longitudinally to the support (3) or the sleeve (4) and housed in a passageway (10) defining a first section (11) and a second section (12) followed by the peg (6) from a storage position to the injection position and then to the protection position,
  • first safety means (21; 36, 34, 35) part of them being elastically deformable, arranged in a way as to prevent the peg from returning from the second section to the first section.

The invention also relates to a set comprising packaging (26) for the said device and the said device.

Claims

1. Protection device (1) intended to at least partially cover the needle (2) of an injection device, the said protection device (1) comprising at least:

a support (3) provided with fixing means (9) intended to secure the said protection device (1) to an injection device,

a sleeve (4) comprising a distal end (15) intended to come into contact with an injection surface and provided with an orifice intended to allow the said needle to pass, the said sleeve (4) being arranged in such a way as to be moveable axially in translation with respect to the said support (3) from a first position known as the storage position, in which the distal end of the said sleeve (4) is at a distance 11 from the said fixing means, to a second position known as the injection position, in which the distal end of the said sleeve (4) is at a distance 12 from the said fixing means, and to a third position known as the protection position, in which the distal end of the said sleeve (4) is at a distance 13 from the said fixing means, the said distances 11 and 13 being greater than the said distance 12,

first return means (14) for returning the said sleeve (4) at least from its injection position to its protection position,

characterized in that the said protection device (1) comprises at least;

axial guidance means (29, 30) for guiding the said sleeve (4), arranged in such a way as to prevent it from pivoting axially as it moves axially with respect to the said support (3) at least from its injection position to its protection position,

at least one peg (6), directly and at least elastically, coupled longitudinally to the said support (3) or to the said sleeve (4) and housed in a running passageway (10) provided respectively in the said sleeve (4) or in the said support (3), the said running passageway (10) forming more or less a U, of which the branches respectively define a first section (11) taken by the said peg (6) as the said sleeve (4) moves from its storage position to its injection position and a second section (12) taken by the said peg (6) as the said sleeve (4) passes from its injection position to its protection position, the said peg (6) being designed to be laterally mobile,

first safety means (5, 21;

39, 34, 35), at least part of them being elastically deform able, sail first safety means (5, 21;

39, 36, 34, 35) being arranged in such a way as to prevent the said peg (6) from returning from the said second section (12) to the said first section (11).

2. Protection device (1) according to claim 1, characterized in that the said axial-guidance means (29, 30) are arranged in such a way as also to prevent the said sleeve (4) from pivoting axially as it moves axially with respect to the said support (3) from its storage position to its injection position.

3. Protection device (1) according to claim 1, characterized in that the said axial-guidance means (29, 30) comprise more or less complementary longitudinal geometric shapes provided respectively on the said sleeve (4) and on the said support (3) and arranged facing one another in order to collaborate.

4. Protection device (1) according to claim 1, characterized in that the said first and second sections (11, 12) of the said running passageway (10) are joined together by a first narrowed region (21, 36) defined by a flexible tongue (39) at least partially defining the said first safety means.

5. Protection device (1) according to claim 1, characterized in that the said peg (6) is urged laterally from the said first section towards the said second section by second return means (34) at least partially defining the said first safety means.

6. Protection device (1) according to claim 1, characterized in that the said support (3) or, respectively, the said sleeve (4) comprises at least one tab (5) able to deflect tangentially and bearing the said peg (6).

7. Protection device (1) according to claim 6, characterized in that the said tab is arranged in such a way as to deflect tangentially in an elastically deformable manner between a normal position and at least one stressed deflected position, said tab (5) at least partially defining the said first safety means.

8. Protection device (1) according to claim 7, characterized in that the said tab (5) is in a normal position or, respectively, in a stressed deflected position when the said peg (6) in the said first section (11), and the said tab (5) is in the stressed deflected position or, respectively, in the normal position when the said peg (6) is in the said second section (12).

9. Protection device (1) according to claim 1, characterized in that the said first and second sections (11, 12) have different lengths arranged in such a way as to delimit the said storage and protection positions such that the said distance 13 is greater than the said distance 11.

10. Protection device (1) according to claim 1, characterized in that, facing the said running passageway (10) provided on the said sleeve (4) or, respectively, on the said support (3), the said support (3) or, respectively, the said sleeve (4) comprises a deflection passage (35) arranged in such a way as to guide the said peg (6) laterally.

11. Protection device (1) according to claim 1, characterized in that it comprises second safety means (23, 33, 37, 34, 38) arranged in such a way as to block the said peg (6) when the said sleeve (4) is in the said protection position.

12. Protection device (1) according to claim 11, characterized in that the said second section (12) of the said running passageway (10) comprises a second narrowed region (23) at least partially defining the said second safety means.

13. Protection device (1) according to claim 11, characterized in that the said second section (12) of the said running passageway (10) comprises at least one step (24) forming a stop catch for the said peg (6) when the said sleeve (4) is in the said protection position and at least partially defining the said second safety means.

14. Protection device (1) according to claim 1, characterized in that the said running passageway (10) and/or the said deflection passage (35) is formed of at least one element chosen from the group comprising a groove, a slot, a rib or a combination of these elements.

15. Protection device (1) according to claim 1, characterized in that the said first and/or second return means (14, 34) are elastically deformable and chosen from the group comprising a helical spring, an elastic leaf, an elastically deformable element.

16. Protection device (1) according to claim 1, characterized in that the said first return means (14) are arranged between the proximal end of the said support (3) and the distal end of the said sleeve (4).

17. Protection device (1) according to claim 6, characterized in that the said sleeve (4) or, respectively, the said support (3) comprises at least one stop wall (8) situated facing the said tab (5) when the device (1) is in the protection position, the said stop wall (8) being arranged in such a way as to prevent the radial deflection of the said tab (5) towards the axis of the said protection device in this protection position.

18. Protection device (1) according to claim 1, characterized in that the said support (3) is provided with an injection needle (2).

19. Injection device (1) comprising at least one injection needle (2) and a reservoir of product that is to be injected, characterized in that it comprises at least one protection device (1) according to claim 1.

20. Set comprising a protection device (1) according to claim 1 and packaging (26) for this device, the said packaging comprising a cylindrical body (27) and a cap (28), the said cylindrical body being equipped on its internal wall with means for blocking the rotation and translation of the said device within the said packaging.