US 12,233,248 B2
Smart injector
Haiming Wu, Weston, MA (US)
Assigned to Biogen MA Inc., Cambridge, MA (US)
Filed by Biogen MA Inc., Cambridge, MA (US)
Filed on Oct. 22, 2021, as Appl. No. 17/508,758.
Application 17/508,758 is a continuation of application No. 16/478,617, granted, now 11,179,523, previously published as PCT/US2018/014387, filed on Jan. 19, 2018.
Claims priority of provisional application 62/448,565, filed on Jan. 20, 2017.
Prior Publication US 2022/0111149 A1, Apr. 14, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 5/315 (2006.01); A61M 5/31 (2006.01)
CPC A61M 5/31568 (2013.01) [A61M 5/31505 (2013.01); A61M 5/31546 (2013.01); A61M 2005/3143 (2013.01); A61M 2205/18 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A device of a large-volume injector, the device comprising:
an injector comprising:
a syringe having a plunger at a proximal end thereof;
a biasing device configured to urge the plunger to move towards a distal end of the syringe;
an activator controlling the rate of injection, the activator is controlled by a control unit;
a gear connected to the plunger;
wherein a linear movement of the plunger causes the gear to rotate; and
a pawl having at least one projection on an inner surface and being connected to the activator, wherein the at least one projection prevents the gear from rotating freely so that the activator controls the linear movement of the plunger.