Water carbonation apparatus for dispensing flavored carbonated drinks supplies carbonation gas to at least two carbonation chambers in each of which water is carbonated and thereafter dispensed to provide a drink. The apparatus has a carbonation selector valve for determining a sequence in which carbonation...http://www.google.com.au/patents/US5139708?utm_source=gb-gplus-sharePatent US5139708 - Dual chamber carbonator for dispensing drinks
