US 11,969,583 B2
Injection device with dose interruption fail safe
Joachim Keitel, Esslingen (DE); and Herbert Bechtold, Denkingen (DE)
Assigned to MEDMIX SWITZERLAND AG, Haag (CH)
Filed by medmix Switzerland AG, Haag (CH)
Filed on Jul. 17, 2018, as Appl. No. 16/037,829.
Prior Publication US 2020/0023136 A1, Jan. 23, 2020
Int. Cl. A61M 5/315 (2006.01); A61M 5/31 (2006.01)
CPC A61M 5/31538 (2013.01) [A61M 5/3146 (2013.01); A61M 5/31541 (2013.01); A61M 5/31551 (2013.01); A61M 2005/3126 (2013.01); A61M 2005/3154 (2013.01); A61M 2205/581 (2013.01); A61M 2205/582 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A dose setting mechanism comprising:
a snap element;
a dose knob;
a floating spline positioned on an outer surface of the snap element such that the snap element can rotate relative to the floating spline, but is axially fixed on the outer surface;
a dose selector comprising an inner surface having one or more dose stops that correspond to finite set of one or more predetermined fixed dose settings; and
a fail safe mechanism comprising a protruding rib circumferentially positioned on the inner surface of the dose selector such that the protruding rib engages a protrusion on the outer surface of the snap element when an axial proximal force exerted on the dose knob is reduced.