An applicator for accurately dispensing small amounts of fluids to tooth surfaces, including a handle, a nozzle which includes a reservoir for fluid and a piston member, and a lever, spring, plunger member, whereby activation of the lever forces the plunger against the piston which, in turn, forces fluid...http://www.google.fr/patents/US4708650?utm_source=gb-gplus-shareBrevet US4708650 - Direct delivery system for dental materials
