US 12,434,004 B1
Medicament delivery device
Daniel Auernhammer, Frankfurt am Main (DE)
Assigned to Genzyme Corporation, Cambridge, MA (US)
Filed by Genzyme Corporation, Cambridge, MA (US)
Filed on Feb. 13, 2025, as Appl. No. 19/052,872.
Int. Cl. A61M 5/31 (2006.01); A61M 5/315 (2006.01)
CPC A61M 5/31501 (2013.01) [A61M 5/31571 (2013.01); A61M 5/3158 (2013.01); A61M 2005/31508 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A medicament delivery device for injecting medicament, wherein the medicament delivery device comprises:
a body comprising a distal end, a proximal end and a longitudinal axis extending from the distal end to the proximal end;
a plunger rod configured to be movable in a distal direction of the body, the plunger rod comprising a plunger rod aperture, wherein a wall of the plunger rod aperture comprises a plunger rod engagement surface;
a catch restrained in the distal direction with respect to the body, the catch comprising a catch aperture, wherein a wall defining the catch aperture comprises a catch engagement surface;
a locking element moveable from a first position to a second position;
wherein, in the first position, the locking element is configured to be in engagement with the plunger rod engagement surface and the catch engagement surface such that movement of the plunger rod in the distal direction is prevented;
wherein, in the second position, the locking element is configured to be in engagement with the plunger rod engagement surface but not the catch engagement surface such that movement of the plunger rod in the distal direction is permitted; and
a release member configured to be moveable from a blocking position, in which the release member is configured to prevent the locking element from moving from the first position to the second position, to a release position, in which the release member is configured to permit the locking element to move from the first position to the second position, wherein the release member is configured to at least partially occupy the plunger rod aperture when the release member is in the blocking position so as to prevent the locking element from moving to the second position.