Patent ID: 6997922
Filing Date: 2006-02-14
Classification: A61K

Abstract:
1. An osmotic delivery system comprising: an enclosure having an interior for holding a beneficial agent, said interior having an interior surface; an osmopolymer located in said interior; a semipermeable body in liquid communication with said enclosure for permitting liquid to permeate through said semipermeable body to said osmopolymer; and a piston located within said interior of said enclosure, the piston being movable with respect to said interior of said enclosure and defining a movable seal with said interior of said enclosure that separates said osmopolymer from the beneficial agent, the piston having a recess that receives a sleeve having an interior that receives at least a portion of said osmopolymer, said osmopolymer located between said piston and said semipermeable body, said osmopolymer for imbibing liquid from a surrounding environment through said semipermeable body to cause said piston to move and in turn cause delivery of said beneficial agent from said enclosure.