FIXED-DOSE MEDICAMENT DELIVERY DEVICE

• US 20150080809A1
• Filed: 02/25/2013
• Published: 03/19/2015
• Est. Priority Date: 03/02/2012
• Status: Active Grant

• Current Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Original Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Inventors: Dasbach, Uwe, Hofmann, Verena
• Granted Patent: US 9,427,527 B2
• Time in Patent Office: Days
• US Class Current: 604/198
• CPC Class Codes: A61M 2005/208 Release is possible only when device is pushed against the skin, e.g. using a trigger which is blocked or inactive when the device is not pushed against the skin
• 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 2205/581 by audible feedback
• 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 5/31555 by purely axial movement of dose setting member, e.g. during setting or filling of a syringe
• CPC Class Codes: A61M 5/31591 Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means
• CPC Class Codes: A61M 5/31595 Pre-defined multi-dose administration by repeated overcoming of means blocking the free advancing movement of piston rod, e.g. by tearing or de-blocking
• 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

Abstract

A medicament delivery device is presented having a housing, a safety sleeve movable between an extended position and a retracted position relative to the housing, a guide sleeve rotatably disposed in the housing, a plunger slidably disposed in the safety sleeve, and a button coupled to the housing. When the safety sleeve is in the retracted position, translation of the button relative to the housing causes the guide sleeve to rotate relative to the safety sleeve. Rotation of the guide sleeve relative to the safety sleeve allows the plunger to translate a predetermined axial distance relative to the safety sleeve.

Claims

1-15. -15. (canceled)

16. A medicament delivery device comprising:

a housing;

a safety sleeve movable between an extended position and a retracted position relative to the housing;

a guide sleeve rotatably disposed in the housing;

a plunger slidably disposed in the safety sleeve; and

a button coupled to the housing,

wherein, when the safety sleeve is in the retracted position, translation of the button relative to the housing causes the guide sleeve to rotate relative to the safety sleeve, and

wherein rotation of the guide sleeve relative to the safety sleeve allows the plunger to translate a predetermined axial distance relative to the safety sleeve.

17. The medicament delivery device according to claim 16, further comprising:

a cartridge of a medicament disposed in the housing, wherein the cartridge includes a stopper slidably disposed in the cartridge.

18. The medicament delivery device according to claim 16, wherein the housing is adapted to engage a needle assembly having a needle.

19. The medicament delivery device according to claim 18, wherein, in the extended position, the safety sleeve covers the needle.

20. The medicament delivery device according to claim 16, further comprising:

a safety sleeve spring biasing the safety sleeve toward the extended position.

21. The medicament delivery device according to claim 16, further comprising:

a plunger spring biasing the plunger relative to the housing.

22. The medicament delivery device according to claim 16, wherein the plunger includes an arm adapted to engage a slot on the safety sleeve.

23. The medicament delivery device according to claim 22, wherein the arm extends through the slot and engages a step element on the guide sleeve.

24. The medicament delivery device according to claim 21, wherein the arm moves from a first step to a second step under the biasing force of the plunger spring when the guide sleeve rotates relative to the safety sleeve.

25. The medicament delivery device according to claim 17, wherein the stopper moves the predetermined axial distance relative to the cartridge.

26. The medicament delivery device according to a claim 16, wherein the guide sleeve includes at least one guide pin adapted to engage one or more of a plurality of ribs on the safety sleeve when the safety sleeve is in the extended position.

27. The medicament delivery device according to claim 26, wherein the one or more of the plurality of ribs disengage the at least one guide pin when the safety sleeve is in the retracted position.

28. The medicament delivery device according to claim 26, wherein the button includes one or more projections adapted to engage the at least one guide pin when the button translates relative to the housing and wherein the engagement of the one or more projections and the at least one guide pin causes the guide sleeve to rotate relative to the safety sleeve.

29. The medicament delivery device according to claim 16, further comprising:

a cap removably engaging at least one of the safety sleeve and the housing.

30. The medicament delivery device according to a claim 16, further comprising:

a button spring biasing the button relative to the housing.