Amgen Inc.
SEALING ARRANGEMENT FOR DRUG DELIVERY DEVICE

Abstract:

A drug delivery device includes a housing releasably coupled with a patient, a container disposed in the housing, a plunger disposed in the container, an activation mechanism, and a seal member. The container includes a wall with an interior surface. The plunger includes an interior surface and is moveably disposed in the container. The interior surfaces of the wall and the plunger define a reservoir adapted to contain a drug. The activation mechanism is adapted to release a drive fluid for moving the plunger through the container to expel the drug therefrom. The seal member is moveably disposed in the container and is adapted to inhibit ingress of the drive fluid into the reservoir.