Patent ID: 8118781
Filing Date: 2012-02-21
Classification: A61M

Abstract:
1. A fluid infusion system for infusing a medication fluid comprising: a reservoir pre-filled with the medication fluid and adapted for use with a pump drive system having a linear actuation member provided with one or more first protrusions, the reservoir comprising: wherein the at least one peripheral sealing portion is made of a material of a first stiffness, and the piston further comprises a core member of a material having a stiffness larger than said first stiffness, the core member comprising one or more connective members being adapted to cooperate with said one or more protrusions of the linear actuation member, and that said one or more connective members are adapted to be substantially rigid in the axial direction while being resilient in a radial direction, thereby forming a releasable connection with the linear actuation member, and wherein the connective members and the protrusions being formed to provide a snap fit engagement or a friction fit engagement.