Patent ID: 8114052

Claim:
A fluid delivery device for dispensing medicaments to a patient comprising: (a) a supporting structure; (b) a pre-filled collapsible container containing the medicaments to be dispensed to the patient, said container having a continuous wall formed of a single material carried by said supporting structure, said collapsible container comprising an hermetically sealed reservoir having a continuous wall formed of a single material, said continuous wall comprising a bellows-like side wall, a neck portion connected to said bellows-like side wall and a bottom wall integrally formed with said side wall, said bottom wall including a cup-shaped portion which, upon collapse of said collapsible container, is disposed in close proximity to said neck portion, said hermetically sealed reservoir having an outlet port and including sealing means for sealing said outlet port; and (c) stored energy means carried by said supporting structure and operably associated with said collapsible container to deliver a nonlinear force tending to collapse said reservoir to expel fluid therefrom, said stored energy means comprising a spring drum and a spring having an elongated pre-stressed strip, said elongated pre-stressed strip portion being coiled about said spring drum in predetermined varying degrees of tightness and after being wound about said spring drum, said spring will retract in a manner to deliver a nonlinear force tending to collapse said fluid reservoir.