Aspirators for medical purposes

摘要

Vacuum aspirator for medical use of the kind which is required to be sterilized by steam and then evacuated so as to be ready for use. Object of the invention is to provide an aspirator which is suitable for repeated use and re-sterilization. The aspirator is provided with an outwardly-opening, non-return valve which may be in a closure plug of a flask of the aspirator or mounted at or inserted in the end of a suction connection remote from the flask of the aspirator.