A Blow/Fill/Seal, or injection molded plungerless syringe having a body portion, a fluid outlet at one end and an air passageway at an opposite end, extending from a back wall leading to a chamber having the ability to receive all syringe air plus some liquid. The air passageway communicates with the...http://www.google.com/patents/US6383166?utm_source=gb-gplus-sharePatent US6383166 - Plungerless syringe: method and apparatus
