Miniaturized injection device for medical use

• US 8,105,283 B2
• Filed: 02/18/2008
• Issued: 01/31/2012
• Est. Priority Date: 02/22/2007
• Status: Active Grant

• Current Assignee: Eveon SAS
• Original Assignee: Eveon SAS
• Inventors: Perriere, Bernard
• Primary Examiner(s): KOHARSKI, CHRISTOPHER
• Application Number:
  US12/526,973
• Publication Number:
  US 20100121271A1
• Time in Patent Office: 1,443 Days
• Field of Search: 604/890.1, 604131-139, 604156-157, 604110-111, 604/272, 604/151
• US Class Current: 604/151
• CPC Class Codes: A61M 2005/14252 with needle insertion means
• CPC Class Codes: A61M 2037/0023 Drug applicators using microneedles
• CPC Class Codes: A61M 2037/0061 Methods for using microneedles
• CPC Class Codes: A61M 37/0015 by using microneedles
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• CPC Class Codes: A61M 5/19 having more than one chamber , e.g. including a manifold coupling two parallelly aligned syringes through separate channels to a common discharge assembly surgical glue applicators A61B17/00491
• 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 miniaturized injection device (1) for medical use comprises a tube (2) extending along a certain axis (A-A) and in which there is disposed at least one reservoir (12) for receiving a medicinal substance, the reservoir being connected to at least one needle (14). The needle is movable in the tube (2) along said axis (A-A) and the injection device (1) further includes a pump (13) interposed between the needle and the reservoir. The pump is controlled by a switch (21) that operates in response to the needle (14) moving in the tube along said axis (A-A).

Claims

1. A miniaturized injection device (1;

51) for medical use comprising two tubes (2;

52;

3, 53) extending along a certain axial direction (A-A;

B-B), a first tube (2;

52) inserted in a second tube (3;

53) with which it cooperates to form a cavity, in which second tube (3;

53) there is placed at least one reservoir (12;

512) for receiving a medicinal substance, the reservoir (12;

512) being connected to at least one needle (14;

514) disposed on a support (23) axially movable within said first tube (2;

52) in such a manner that said needle (14;

514) is moved axially in said first tube (2;

52) in response to axial movement of said second tube (3;

53) relative to said first tube (2;

52), and the miniaturized injection device (1;

51) being characterized in that, it is arranged in order that, in a step, the pressure exerted on said second tube (3;

53) and the axial translation movement of said second tube (3;

53) is transmitted to said reservoir (12;

512), said needle (14;

514) and said support (23), said needle (14;

514) being therefore movable in said first tube (2;

52) along said axial direction (A-A;

B-B), and in that it further comprises a pump (13;

513) interposed between said needle (14;

514) and said reservoir (12;

512), said pump (13;

513) being controlled by means of a switch (21;

521) that operates, in a further step, in response to said axial translation movement of said needle (14;

514) and said reservoir (12;

512) and said support (23) in said first tube (2;

52) along said axial direction (A-A;

B-B), leading to contact between an abutment (22) and said switch (21;

521), said switch (21;

521) being able to change state, thereby having the effect of causing said pump (13;

513) to operate and leading in again a further step to the medicinal substance being injected into the patient'"'"'s body.

2. An injection device according to claim 1, in which the needle (14;

514) initially moves forwards along said axial direction (A-A;

B-B) so as to move out from the tube (2;

52), and then rearwards back along said axial direction (A-A;

B-B) in order to retract into the tube (2;

52), the injection device including blocking means (28) for blocking movement of the needle (14;

514) and that act to block movement of the needle (14;

514) after it has moved twice in the tube (2;

52) respectively forwards and rearwards.

3. An injection device according to claim 2, in which the blocking means comprises an L-shaped lever (30) pivotally mounted at the intersection between limbs of the L-shape.

4. An injection device according to claim 1, in which said pump (13;

513) is an electric pump powered by an electric motor connected to a battery (24;

537) via said switch (21;

521).

5. An injection device according to claim 1, in which the needle (14;

514) is movable axially as far as an abutment (22;

522), and in which the switch (21;

521) is operated when the needle (14;

514) comes into abutment.

6. An injection device according to claim 1, in which the pump (13;

513) is mounted in a needle support (23;

536) that is movable axially within the tube, at least one spring (18, 518) being provided in the tube to oppose movement of the support (23;

536) in the tube (2;

52).

7. An injection device according to claim 1, in which said reservoir (12;

512) is movable axially relative to the needle (14;

514) in the tube, and in which the reservoir (12;

512) is connected to the pump (13;

513) via at least one percussion cone (16;

516).

8. An injection device according to claim 1, in which said tube (2;

52) is an inner tube inserted in an outer tube (3;

53) disposed coaxially about said inner tube, in such a manner that the needle (14;

514) is moved axially in the inner tube in response to axial movement of the outer tube relative to the inner tube.

9. An injection device according to claim 8, in which said inner and outer tubes present respective first and second collars (5, 7;

55, 57) about the axis, and in which a removable spacer (4;

54) is interposed between the two collars (5, 7;

55, 57) to block relative axial movement of one tube relative to the other.

10. An injection device according to claim 1, in which the reservoir (12) with the pump (13) and the needle (14) are assembled together to form a cartridge.

11. An injection device according to claim 1, characterized in that it includes a plurality of cartridges (526).

12. An injection device according to claim 11, in which said cartridges (526) present respective sections in the form of circular sectors and are distributed around the longitudinal axis (B-B).

13. An injection device according to claim 11, characterized in that said cartridges (526) are disposed in a support system (525) that is rotatable about the longitudinal axis (B-B).

14. An injection device according to claim 1, in which each needle (14;

514) has one or more vents (102) that are disposed laterally relative to the needle.

15. An injection device according to claim 14, in which said vents (102) are disposed in a circular or a spiral configuration.

16. An injection device according to claim 1, in which said reservoir (12;

512) is rigid.