Patent ID: 7954492

Claim:
A pharmaceutical powder cartridge removably insertable into a powder inhaler, said cartridge having a storage space defining a pharmaceutical depot for holding a large number of pharmaceutical powder doses, said cartridge including a housing body defining said storage space and a lid for substantially enclosing said storage space, said cartridge further including a metering device, said metering device including a metering slide channel and a metering slide received within said metering slide channel and defining a dosing cavity, said metering slide movable within said metering slide channel between a filling position in which said dosing cavity of said metering slide is in communication with said storage space and a dispensing position in which said dosing cavity of said metering slide is not in communication with said storage space, said cartridge further including a single elastic seal member, said seal separate from and in abutment with said metering slide, said seal member preventing moisture from the environment from entering the storage space when the metering slide is in said filling position; wherein said metering slide channel is defined by a pair of opposing parallel walls and said metering slide is received between and slidable with respect to said walls, and said seal member engages said pair of opposing parallel walls when said metering slide is in said filling position and does not engage said pair of opposing parallel walls when said metering slide is in said dispensing position.