Pump mechanism with double reservoir and stationary fluid ports

A pump for delivering medication to a user, comprising:

• an outer reservoir for storing the medication;
• an inner reservoir for storing the medication, configured to be linearly translatable within the outer reservoir;
• a static plunger disposed interior to the inner reservoir;
• a hollow plunger tube supporting the static plunger extending between the inner reservoir and the outer reservoir to fluidically couple the outer reservoir with the inner reservoir;
• and
• a dispense port for dispensing the medication, the dispense port extending through the hollow plunger tube to create a fluid path to facilitate removal of air from the reservoirs.

An insulin delivery device, comprising:

• a pump for dispensing insulin, comprising:
• an outer reservoir for storing the insulin;
• an inner reservoir for storing the insulin, configured to be linearly translatable within the outer reservoir;
• a static plunger disposed interior to the inner reservoir;
• a hollow plunger tube supporting the static plunger extending between the inner reservoir and the outer reservoir to fluidically couple the outer reservoir with the inner reservoir;
• a dispense port for dispensing the medication, the dispense port extending through the hollow plunger tube to create a fluid path to facilitate removal of air from the reservoirs;
• and
• a controller for controlling dispensing of the insulin by the pump.