US Patent 7273188 Internal self-rotating fluid jetting nozzle

An embodiment of an internal self-rotating fluid nozzle includes a rotor rotatably moveable within a nozzle body cavity. The rotor may include a jewel holder that carries at least one jewel member and spins against a rotor seat disposed near the front of the cavity. The rotor seat may be floating. At least one fluid drive passageway may be disposed within, and oriented angularly relative to the central axis of, the cavity. A fluid flow director may be included, extend around the inner circumference of the cavity and include a protruding portion that directs fluid into a forward portion of the cavity.