Pharmaceutical mixing container with extendable agitator bellows

摘要

A pharmaceutical mixing container for storing a liquid having at least two factions which tend to separate during storage. A housing has an inner volume and is closed at one end by a septum arrangement. An extendable mixing element is slidably and sealingly positioned within the inner volume, the mixing element including a base member having a longitudinally extending through bore, a flexible bellows element secured to the base member and an actuating rod slidingly received within the through bore and coupled to the central portion of the bellows element. The bellows element is an axially symmetric member having convoluted concentric wall portions, and the actuating rod is coupled to the central region of the bellows element. By manipulating the actuating rod in opposite directions, the bellow is alternately extended and retracted to create general gentle agitation for any liquid and miscible component contained within the housing.