A disposable plastic pump for dispensing liquids is disclosed which comprises two basic unitary, preferably all plastic, elements: a chamber forming body having an open outer end and an inner end in fluid communication with a liquid reservoir, and a piston formed to slidably fit into the...http://www.google.fr/patents/US5676277?utm_source=gb-gplus-shareBrevet US5676277 - Disposable plastic liquid pump
