Patent ID: 8100890

Claim:
A dispensing device for dispensing a medicament to a patient comprising: (a) a device housing; (b) a reservoir defining assembly carried by said housing, said reservoir defining assembly comprising an integrally formed, hermetically sealed container including a collapsible accordion-like, continuous uninterrupted side wall, a neck portion connected to said side wall, said neck portion having a closure wall, said container having an inlet port and an outlet port; (c) a spring carried by said housing and operably associated with said reservoir defining assembly for collapsing said collapsible reservoir to expel fluid medicament therefrom; (d) a flow rate control assembly carried by said device housing for controlling the rate of flow of medicament from said reservoir to the patient, said flow rate control assembly including: (i) a first rate control plate having a plurality of fluidic micro-channels interconnected with said outlet port of said collapsible reservoir; (ii) a second rate control plate connected to said first rate control plate and having a plurality of fluidic micro-channels in communication with said plurality of fluidic micro-channels of said first rate control plate; (iii) a rate control distribution plate connected to said second rate control plate and having a plurality of fluidic channels in communication with said plurality of fluidic micro-channels of said second rate control plate; (iv) a fluid pickup housing connected to said rate control distribution plate, said fluid pickup housing having a plurality of spaced-apart, fluid passageways in communication with said plurality of fluidic micro-channels of said rate control distribution plate; and (v) a rotatable patient weight selector knob operably associated with said fluid pickup housing, said rotatable patient weight selector knob having a plurality of circumferentially spaced fluid ports in communication with said plurality of spaced-apart, fluid passageways of said fluid pickup housing; (e) a dose control assembly carried by said device housing and operably associated with said flow rate control assembly for controlling the dose of medicament flowing from said reservoir to the patient, said dose control assembly comprising a rotatable patient dose selector knob having a fluid passageway in communication with said plurality of spaced-apart, fluid passageways of said fluid pickup housing; and (f) an administration set connected to said device housing and in communication with said dose control assembly.