Medication delivery system phase two

A device for administering a medication to a patient comprising:

• means for receiving a medication container;
• a rigid housing for holding medication, said rigid housing having a first end, a second end, and a main body portion so as to define a chamber therewithin, said first end having an aperture defined therethrough, and said second end having at least one orifice for limiting the volumetric rate of flow through said chamber from said second end to said first end;
• first conduit means fluidly coupled to said means for receiving and fluidly coupled to said chamber so as to define a flow path for medication therebetween;
• a mouthpiece;
• second conduit means fluidly coupled to said mouthpiece and to said aperture so as to define a flow path therebetween;
• means defining a variable volume chamber for unmedicated ambient air and including a flexible diaphragm element coupled to a rigid wall element so as to define a collapsible chamber;
• third conduit means fluidly coupled to said variable volume chamber and to said second conduit means so as to define a flow path therebetween;
• a venturi defined in said second conduit means and extending along a portion of the length thereof, said third conduit means being fluidly coupled to said second conduit means at a throat of said venturi;
• and
• means for initially allowing unmedicated, ambient air to flow from said variable volume chamber through said third conduit means and said second conduit means to said mouthpiece and, after a predetermined amount of unmedicated ambient air has flowed from said variable volume chamber to said mouthpiece, for allowing medicated air to flow from said chamber in said rigid housing through said second conduit means to said mouthpiece;
• whereby a patient can inhale a volume of unmedicated ambient air through said mouthpiece and thereafter automatically inhale medication from said chamber at a flow rate limited by said least one orifice.