Patent ID: 8950396
Filing Date: 2015-02-10
Classification: A61M

Abstract:
1. Dispensing device for dispensing a formulation, containing at least one powder, as a spray, the dispensing device comprising: a hand-holdable housing, a storage device with a plurality of storage chambers, each of which contains a separate pre-metered dose of said formulation, means for sequentially bringing each of said pre-metered doses of the formulation into a dispensing position, and means for providing a pulsed flow of air, having multiple pressure pulses, into each pre-metered dose of the formulation that is in said dispensing position so as to loosen or deagglomerate the formulation and for dispensing the dose as a spray with desired spray plume characteristics, wherein the means for providing a pulsed flow of air comprises a bellows or piston pump on which a spring acts in a compressive direction and a connecting element having a flow restrictor through which pressurized air is supplied from the bellows or piston pump individually to an inlet of a respective one of the storage chambers of the storage device containing the pre-metered doses of the formulation, the spring and the flow restrictor being constructed in a manner producing oscillation or vibration of the bellows or piston pump after an uninterrupted period of increasing dispensing pressure or stroke.