The swirling type micro-bubble generating system according to the present invention possesses a container main unit having a cylindrical space with bottom or a frusto-conically shaped space, a liquid inlet provided in a tangential direction on a part of a circumferential surface of an inner wall of said...http://www.google.fr/patents/US7261283?utm_source=gb-gplus-shareBrevet US7261283 - Swing type fine air bubble generating device
