An eductor assembly includes an inlet connectable to a high pressure water source useful in firefighting, an outlet connectable to a fire hose and/or nozzle, and a venturi therebetween. An additive inlet communicates with the venturi so that a chemical additive, such as a foam concentrate, is educed...http://www.google.es/patents/US7367361?utm_source=gb-gplus-sharePatente US7367361 - Eductor apparatus
