Patent ID: 7040316

Claim:
A medicament delivery device for administering an inhalable medicament to a user, said device comprising: a) a medicament reservoir; b) an entrance port and an exit port each disposed adjacent said reservoir; c) a gas chamber disposed adjacent said entrance port; d) a pressurizing mechanism operable to pressurize said gas chamber to at least a prescribed pressure; e) a first frangible membrane extending across said entrance port and separating said reservoir from said gas chamber; and f) a second frangible membrane extending across said exit port; g) a tube disposed adjacent said exit port and defining a delivery opening opposite said exit port, said delivery opening being open prior to actuation of said pressurizing mechanism; h) a piercing member configured to initially engage said first membrane on a surface of said first membrane facing said reservoir; i) wherein, when said pressurizing mechanism is actuated, said piercing member engages and disrupts said first membrane to allow gas to flow through said first membrane and said entrance port and said reservoir and to carry the medicament through said exit port.