A cascade waterfall or water fountain display with a compact, energy-efficient, low cost DC powered water pump. An electronic controller controls the operation of the water pump and is also used to generate visual and sound effects. The water pump is comprised of a DC motor with a motor shaft, a motor...http://www.google.fr/patents/US6206298?utm_source=gb-gplus-shareBrevet US6206298 - DC powered low resistance water pump and a waterworks display employing said pump
DC powered low resistance water pump and a waterworks display employing said ...
