Patent ID: 8764723

Claim:
A system for controlling pressure in a fluid reservoir, the system comprising: a housing structure having an opening and an interior volume through which a portion of a base assembly may be inserted and received; a pierceable member having a hollow interior volume, a first end and a second end, the pierceable member arranged in the interior volume of the housing structure, for movement relative to the housing structure from a first position to a second position, the pierceable member arranged to receive a force from the portion of a base assembly to move the pierceable member from the first position to the second position, when the portion of the base assembly is inserted through the opening and received within the interior volume of the housing; and a hollow needle arranged to be connected in fluid flow communication with the fluid reservoir, the hollow needle having a longitudinal dimension and a piercing end arranged within the hollow interior volume of the pierceable member when the pierceable member is in the first position, the piercing end of the hollow needle piercing through the first end of the pierceable member when the pierceable member is moved from the first position to the second position; the interior volume of the pierceable member configured to receive fluid from the hollow needle in response to an increase in fluid pressure within the fluid reservoir before the hollow needle pierces through the first end of the pierceable member.