The present invention is an apparatus for creating a "pop jet" type of ornamental fountain with an output stream in the form of surface-tension envelope or "ball" of fluid, embedded with air bubbles. By virtue of the laminar nature of the fluid created, the natural surface tension of the fluid prevents...http://www.google.es/patents/US5161740?utm_source=gb-gplus-sharePatente US5161740 - Pop jet fountain
