A syringe nasal sprayer includes an elongate barrel having an open proximal end, a chamber for retaining fluid and a tip portion extending from a distal end of the barrel having a passageway therethrough communicating with the chamber. A stopper is slidably positioned in fluid-tight engagement inside...http://www.google.ca/patents/US5601077?utm_source=gb-gplus-sharePatent US5601077 - Nasal syringe sprayer with removable dose limiting structure
