chamber disposed adjacent the entrance port the device includes a pressurizing mechanism operable to pressurize said gas chamber to at least a prescribed pressure a first frangible membrane extends across the entrance port and separates the reservoir from the gas chamber a second frangible membrane extends across the exit port when the pressurizing mechanism is attached at least one of the first and second membranes is responsive to the prescribed pressure in the gas chamber to burst to allow gas to flow through the entrance port and the reservoir and to carry the medicament through the exit port application_number US 47055709 A description the present invention now will be described more fully hereinafter with reference to the accompanying drawings in which preferred embodiments of the invention are shown this invention may however be embodied in many different forms and should not be construed as limited to the embodiments set forth herein rather these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those skilled in the art like numbers refer to like elements throughout in the figures certain components and the thicknesses of some layers may be exaggerated for clarity with reference to fig1 4 a medicament inhalation delivery device 101 according to embodiments of the present invention is shown therein the delivery device 101 includes a dispenser 100 and a delivery tube 180 see fig1 the dispenser 100 includes a pressurizing mechanism 110 a storage volume 116 and a diffuser tube 120 the dispenser 100 contains a quantity of a desired medicament 5 see fig3 in the storage volume 116 preferably the quantity of medicament corresponds to a single therapeutic dose the medicament 5 may be a sterile dry powder medicament generally and.