A material dispensing apparatus for placing a material in the uterine cavity and moving the material from the uterine cavity into the fallopian tubes of a female. An elongated probe carries an expandable member, and a housing connected to the probe has a piston and cylinder structure and a container...http://www.google.fr/patents/US4109654?utm_source=gb-gplus-shareBrevet US4109654 - Single stroke dispensing apparatus
