US 12,076,540 B2
Autoinjector
Thomas Kemp, Ashwell (GB)
Assigned to Sanofi-Aventis Deutschland GMBH, Frankfurt am Main (DE)
Filed by SANOFI-AVENTIS DEUTSCHLAND GMBH, Frankfurt am Main (DE)
Filed on Jan. 27, 2022, as Appl. No. 17/586,272.
Application 16/721,467 is a division of application No. 14/903,398, granted, now 10,525,206, issued on Jan. 7, 2020, previously published as PCT/EP2014/064424, filed on Jul. 7, 2014.
Application 17/586,272 is a continuation of application No. 16/721,467, filed on Dec. 19, 2019, granted, now 11,260,181.
Claims priority of application No. 13175661 (EP), filed on Jul. 9, 2013.
Prior Publication US 2022/0143322 A1, May 12, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 5/315 (2006.01); A61M 5/20 (2006.01); A61M 5/32 (2006.01); A61M 5/50 (2006.01)
CPC A61M 5/31586 (2013.01) [A61M 5/2033 (2013.01); A61M 5/3202 (2013.01); A61M 2005/2013 (2013.01); A61M 2005/3247 (2013.01); A61M 5/326 (2013.01); A61M 5/5086 (2013.01); A61M 2205/581 (2013.01); A61M 2205/582 (2013.01); A61M 2205/583 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An autoinjector comprising:
a case configured to hold a medicament container permanently axially fixed in the case against movement in a distal direction;
a plunger movable in the distal direction relative to the case to dispense medicament from the medicament container; and
a plunger release mechanism comprising:
an angled surface;
a first shroud boss translatable between an extended position relative to the angled surface and a retracted position relative to the angled surface; and
a plunger boss on the plunger, wherein the plunger boss is adapted to engage the angled surface such that the plunger boss rotates relative to the angled surface when the plunger boss is biased against the angled surface,
wherein the first shroud boss is arranged to abut the plunger boss to inhibit the plunger boss from disengaging from the angled surface, and
wherein the plunger boss is adapted to disengage from the angled surface when the first shroud boss is in the retracted position thereby axially misaligning the first shroud boss with the plunger boss such that the plunger boss, due to being biased in the distal direction towards the angled surface, rotates and comes clear of the angled surface to allow the plunger boss to translate axially relative to the angled surface.