A water spray gun has a barrel, the front of which includes a nozzle which is operable to eject water in a chosen one of a number of different patterns. At the rear of the barrel there is provided a handle having a passage for water supplied to the gun. The admission of water through the handle and thence...http://www.google.es/patents/US5323968?utm_source=gb-gplus-sharePatente US5323968 - Water spray gun
