Patent ID: 8393357

Claim:
A method of making and filling a reservoir with a selectable amount of fluidic media comprising: providing a reservoir body with a wall and a central bore, the reservoir body having a first portion with a first fluidic capacity, and a second portion axially aligned with the first portion with an additional fluidic capacity; providing a selectively breakable zone that separates the first portion and the second portion of the reservoir body; arranging a plunger head for axial movement within the bore at least between the selectively breakable zone and a port of the reservoir body to expel fluidic media in the bore through the port of the reservoir body; and selecting whether: to fill only the first portion of the reservoir body with fluidic media, in which case the method includes filling the first portion of the reservoir body with fluidic media, inserting the plunger head to a position in the bore to seal the first portion of the reservoir body, and breaking off the wall at the selectively breakable zone; or to fill the first portion and the second portion of the reservoir body with fluidic media, in which case the method includes filling the first portion and the second portion of the reservoir body with fluidic media and inserting the plunger head to a position in the bore to seal the second portion of the reservoir body.