US 12,285,595 B2
Injection device with flexible dose selection
Joachim Keitel, Esslingen (DE)
Assigned to MEDMIX SWITZERLAND AG, Haag (CH)
Filed by MEDMIX SWITZERLAND AG, Haag (CH)
Filed on Jun. 5, 2023, as Appl. No. 18/205,957.
Application 18/205,957 is a continuation of application No. 16/888,086, filed on May 29, 2020, granted, now 11,969,584.
Application 16/888,086 is a continuation of application No. 15/649,287, filed on Jul. 13, 2017, granted, now 10,688,247, issued on Jun. 23, 2020.
Prior Publication US 2023/0321357 A1, Oct. 12, 2023
Int. Cl. A61M 5/315 (2006.01); A61M 5/24 (2006.01); A61M 5/50 (2006.01)
CPC A61M 5/3156 (2013.01) [A61M 5/24 (2013.01); A61M 5/31536 (2013.01); A61M 5/31541 (2013.01); A61M 5/31551 (2013.01); A61M 5/31553 (2013.01); A61M 5/31563 (2013.01); A61M 5/3157 (2013.01); A61M 5/3158 (2013.01); A61M 5/31593 (2013.01); A61M 2005/3154 (2013.01); A61M 5/50 (2013.01); A61M 2205/581 (2013.01); A61M 2205/582 (2013.01); A61M 2207/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An injection device having a priming feature, the injection device comprising:
a piston rod configured to move axially in a proximal direction such that during dose delivery the piston rod exerts an axial force causing a plunger within a container of medicament to move proximally pressurizing the medicament so that it is discharged through a proximal opening in the container of medicament;
a nut threadedly engaged with the piston rod; and
a clutch configured to be rotated during assembly of the injection device, which causes rotation of the nut to cause the piston rod to move axially relative to a housing of the injection device prior to setting a dose of the medicament to be discharged,
the clutch being configured to be rotated until a foot located on the piston rod is in firm abutment with a distal facing surface of the plunger of the container.