An aspirator includes two closed containers with one container having a suction tube connected to a closed bellows within the container for creating a vacuum, and the second container having a patient tube for insertion into the body cavity of a patient for sucking removal of mucus and other excess bodily...http://www.google.ca/patents/US4799925?utm_source=gb-gplus-sharePatent US4799925 - Aspirator for collection of bodily fluids
