Drug delivery insertion apparatuses and system

An on-body pump device, comprising:

• a first reservoir configured to hold a first fluid;
• a second reservoir configured to hold a second fluid;
• a first pump mechanism fluidly coupled to the first reservoir, the first pump mechanism operable to pump the first fluid from the first reservoir;
• a second pump mechanism fluidly coupled to the second reservoir, the second pump mechanism operable to pump the second fluid from the second reservoir;
• a flow regulator valve fluidly coupled to the first pump mechanism and the second pump mechanism, wherein the flow regulator valve includes:
• a first flow channel and a second flow channel,
• an inner valve coupled to the first flow channel operable to deliver the first fluid at a first variable flow rate,
• an outer valve coupled to the second flow channel operable to deliver the first fluid at a second variable flow rate independent of the first flow rate, and
• a gear system configured to independently set a first flow rate of the first fluid from the first pump mechanism relative to a second flow rate of the second fluid from the second pump mechanism;
• and
• a cannula fluidly coupled to the flow regulator valve.

A secondary unit, comprising:

• an opening configured to receive a prefilled cartridge containing a liquid drug, wherein a fill needle and a cartridge stop are within the opening;
• a variable fill mechanism operable to extract a volume of the liquid drug from a prefilled cartridge inserted in the opening, wherein the volume is variable based on a volume setting mechanism;
• and
• a needle insertion mechanism configured to actuate an introducing needle of an on-body pump device,
• wherein the variable fill mechanism includes:
• a needle operable to extract a volume of the liquid drug from the prefilled cartridge when received in the opening;
• a variable fill rod operable to contact the prefilled cartridge and move as the prefilled cartridge is inserted farther in the opening,
• an indicator rod configured to move as the prefilled cartridge is inserted farther in the opening, and
• a gear operable to move a visual indicator of the indicator rod corresponding to a fill volume of the liquid drug within the reservoir;
• wherein the fill needle is configured to pierce a septum of the on-body pump device to deliver the fill volume of liquid drug to the on-body pump device while the on-body pump device is attached to skin of a user.