Drug delivery device including reservoir with flexible lining

Abstract

Embodiments of the present disclosure relate to techniques, processes, devices or systems for pump devices for providing a fixed volume of fluid, which is delivered and refilled within one pumping cycle. In one approach, a wearable drug delivery device may include a reservoir configured to store a liquid drug, and a drive mechanism coupled to the reservoir for receiving the liquid drug. The drive mechanism may include a housing defining a chamber, the housing including an inlet valve operable to receive the liquid drug and an outlet valve operable to expel the liquid drug from the chamber, and a resilient sealing member within the chamber. The drive mechanism may further include a shape memory wire coupled to the resilient sealing member, wherein the shape memory wire is operable to bias the resilient sealing member within the chamber.