Medication delivery device including disposable and reusable portions

A reusable assembly for use with a syringe assembly that when combined is capable of delivery of medication, the syringe assembly comprising a barrel and a piston, the assembly comprising:

• a housing comprising a passageway extending along a longitudinal axis between a proximal end and a distal end of the housing, and wherein the housing includes a radial opening that is configured to receive the syringe assembly in a radial direction;
• and
• a shuttle comprising a guide configured to receive a carrier of the syringe assembly through the radial opening;
• and
• an actuator assembly coupled with the shuttle and configured to move the syringe assembly through the passageway of the housing between:
• a deployed state in which a needle extends from the distal end of the housing to a position to expel a medication;
• and
• a retracted state in which the needle is retracted into the distal end of the housing after being in the deployed state,
• wherein the actuator assembly comprises a flexible plunger member that extends through a portion of the shuttle and distally into the barrel of said syringe assembly to advance the piston, wherein the flexible plunger member comprises a metal wire, a polymer ribbon, a rubber ribbon, a polymer coil, or metal coil.

A medication delivery device, comprising:

• a disposable portion comprising a syringe, the syringe comprising a barrel to contain a medication, a piston positioned within the barrel, and a needle positioned at a distal end of the barrel;
• and
• a reusable portion comprising a housing comprising a passageway extending along a longitudinal axis between a proximal end and a distal end of the housing, wherein the disposable portion is positioned within the passageway, and a shuttle configured to receive a portion of the disposable portion, a flexible plunger member configured to bend and extend through the shuttle, wherein the flexible plunger member comprises a metal wire, a polymer ribbon, a rubber ribbon, a polymer coil, or metal coil, and an actuator assembly coupled with the shuttle and configured to move the disposable portion through the passageway of the housing between a stowed state in which the needle is concealed within the distal end of the housing, a deployed state in which the needle extends from the distal end of the housing to deliver the medication to a patient, and a retracted state in which the needle is retracted into the distal end of the housing,
• wherein, while in the deployed state, the flexible plunger member is configured to advance the piston within the barrel, and, after the deployed state, the flexible plunger member is configured to be retracted from the barrel.