US 11,690,960 B2
Variable dosing syringe
Gautam Nithyanand Shetty, Hanover, MD (US); and Lou Castagna, Middletown, PA (US)
Assigned to Congruence Medical Solutions, LLC, Hanover, MD (US)
Filed by Congruence Medical Solutions, LLC, Hanover, MD (US)
Filed on Nov. 13, 2020, as Appl. No. 17/98,276.
Claims priority of provisional application 62/935,193, filed on Nov. 14, 2019.
Prior Publication US 2021/0146058 A1, May 20, 2021
Int. Cl. A61M 5/315 (2006.01); A61M 5/32 (2006.01)
CPC A61M 5/31551 (2013.01) [A61M 5/3157 (2013.01); A61M 5/3234 (2013.01); A61M 2205/581 (2013.01)] 38 Claims
OG exemplary drawing
 
1. A plunger rod assembly for a syringe comprising:
a main body;
a plunger rod at least partially received in the main body and comprising a set of one or more protrusions; and
a dosage setter operatively coupled to the plunger rod and comprising a rotatable body that comprises a set of one or more stops for engaging the set of one or more protrusions of the plunger rod depending on at least a rotational position of the set of one or more stops relative to the set of one or more protrusions, wherein a first rotational adjustment associated with the dosage setter is configured to set a first dosage increment by adjusting a relative axial position between the rotatable body and the plunger rod, and a second rotational adjustment associated with the dosage setting assembly is configured to set a second dosage increment that is larger than the first dosage increment by adjusting a relative rotational alignment between the set of one or more stops and the set of one or more protrusions.