Medicament injection device

• US 9,061,104 B2
• Filed: 02/01/2011
• Issued: 06/23/2015
• Est. Priority Date: 03/09/2010
• Status: Active Grant

• Current Assignee: Shl Medical AG
• Original Assignee: SHL Group AB
• Inventors: Daniel, Mattias
• Primary Examiner(s): Stigell, Theodore
• Assistant Examiner(s): Legette, Tiffany
• Application Number:
  US13/583,626
• Publication Number:
  US 20130144218A1
• Time in Patent Office: 1,603 Days
• Field of Search: 604187-188, 604/192, 604197-198, 604232-237, 604239-241, 604/263, 206/365
• US Class Current: 1/1
• CPC Class Codes: A61M 2005/2013 triggering of discharging means by contact of injector with patient body
• CPC Class Codes: A61M 2205/192 Avoiding coring, e.g. preventing formation of particles during puncture
• CPC Class Codes: A61M 5/2033 Spring-loaded one-shot injectors with or without automatic needle insertion multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287
• CPC Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: A61M 5/2466 by piercing without internal pressure increase A61M5/2429 takes precedence
• CPC Class Codes: A61M 5/3202 Devices for protection of the needle before use, e.g. caps A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001
• CPC Class Codes: A61M 5/3243 being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel devices for protecting guide needles in combination with catheters A61M25/0612
• 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 5/347 rotatable, e.g. bayonet or screw A61M5/344 takes precedence

Abstract

A medicament delivery device comprising a housing, a tubular activation member, a first resilient member, a container holder, a medicament container (80), a tubular operation member (100), a plunger rod (90), a delivery member; wherein the container is a cartridge, having a membrane (82) and in that the delivery member comprises a retainer member (70) fixedly connected to the container holder, a hub (60) coaxially movable within the retainer member, a needle having opposite proximal and distal ends, and a cap (10) interactively connected to the hub and to the retainer member, wherein the cap comprises a distal end surface abutting with the proximal end surface of the annular contact member such that said hub may be distally moved whereby the needle penetrates the membrane and the cap is detached from the retainer member, allowing the tubular activation member to be moved its activated position.

Claims

1. A medicament delivery device, comprising:

a tubular housing having opposite proximal and distal ends;

a tubular activation member slidably and coaxially arranged inside the tubular housing and comprising a proximal annular contact member;

a first resilient member arranged at the distal end of the tubular activation member for moving the tubular activation member in a proximal direction from a non-activated position, in which the annular contact member is in contact with the proximal end of the housing, to an activated position, in which the annular contact member is at a predetermined distance from the proximal end of the housing;

a container holder coaxially arranged within the tubular activation member and fixedly attached to the tubular housing;

a medicament container arranged within the container holder and including a slidable stopper;

a tubular operation member rotatably arranged between the container holder and a tubular extension part at the distal end of the housing and comprising a first co-acting device interactively connected to a corresponding first co-acting device of the tubular activation member;

a plunger rod and a second resilient member, wherein a proximal end of the plunger rod contacts the stopper and comprising a second co-acting device interactively connected to a corresponding second co-acting device of the tubular operation member; and

a delivery member;

wherein the container is a cartridge having a membrane;

the delivery member comprises a retainer member fixedly connected to the container holder, a hub coaxially movable within the retainer member, a needle having opposite proximal and distal ends and being fixedly attached to the hub, and a cap interactively connected to the hub and to the retainer member;

the cap comprises a distal end surface abutting the proximal end surface of the annular contact member such that when the cap is manually operated, the hub is distally moved whereby a distal end of the needle penetrates the membrane and the cap detaches from the retainer member, thereby enabling the tubular activation member to be moved by a force from the first resilient member from its non-activated position to its activated position.

2. The medicament delivery device of claim 1, wherein the second co-acting devices include at least one ledge on an inner surface of the tubular operation member and at least one protrusion on an outer surface of the plunger rod, such that the at least one protrusion abuts the at least one ledge for holding the plunger rod and the second resilient member in a pre-tensioned state.

3. The medicament device of claim 1, wherein the hub comprises a first coupling device interactively connected to a corresponding first coupling device of the retainer member, and a second coupling device interactively connected to a corresponding second coupling device of the cap.

4. The medicament device of claim 3, wherein the cap further comprises a third coupling device interactively connected to a corresponding third coupling device of the retainer member.

5. The medicament delivery device of claim 1, wherein the first co-acting devices include at least one inwardly extending protrusion on the distal end of the inner surface of the tubular activation member and at least one groove on an outer surface of the tubular operation member, such that the radially inwardly extending protrusion is configured to be guided within the at least one groove thereby forcing the tubular operation member to rotate when the tubular activation member axially moves.

6. The medicament delivery device of claim 5, wherein the second co-acting devices include at least one ledge on an inner surface of the tubular operation member and at least one protrusion on an outer surface of the plunger rod, such that the at least one protrusion abuts the at least one ledge for holding the plunger rod and the second resilient member in a pre-tensioned state.

7. The medicament device of claim 5, wherein the hub comprises a first coupling device interactively connected to a corresponding first coupling device of the retainer member, and a second coupling device interactively connected to a corresponding second coupling device of the cap.

8. The medicament device of claim 7, wherein the cap further comprises a third coupling device interactively connected to a corresponding third coupling device of the retainer member.

9. The medicament delivery device of claim 1, further comprising a locking mechanism interactively connected to the tubular activation member.

10. The medicament delivery device of claim 9, wherein the locking mechanism includes a flexible tongue on the at least one groove of the tubular operation member which locks the radially inwardly extending protrusion when the radially inwardly extending protrusion moves over the tongue.

11. The medicament device of claim 9, wherein the hub comprises a first coupling device interactively connected to a corresponding first coupling device of the retainer member, and a second coupling device interactively connected to a corresponding second coupling device of the cap.

12. The medicament device of claim 11, wherein the cap further comprises a third coupling device interactively connected to a corresponding third coupling device of the retainer member.