Patent ID: 8162239

Claim:
A fluid nozzle comprising: A nozzle entrance configured to receive fluid under pressure therein; A fluid conduit through the nozzle extending from the nozzle entrance; A final nozzle exit at an end of the fluid conduit and configured to produce an exit fluid stream which may be adapted to some useful purpose; at least one safety flow passage extending to the fluid conduit and providing for selective redirecting of the exit fluid stream away from the final nozzle exit flow path, when the final nozzle exit is at least substantially obstructed; and at least one check valve coupled to each safety flow passage configured to permit such redirected fluid stream to exit the nozzle when the final nozzle exit is at least substantially obstructed, and configured to permit an exit fluid stream through the final nozzle exit at least when the final nozzle exit is not substantially obstructed whereby the check valve is configured to prevent back flow of local ambient fluid from being drawn through the associated safety flow passage towards the fluid conduit.