Jet cleaning apparatus for boats

Claim 1

An underwater jet apparatus adapted to permanently underlie a submerged structure having an underwater surface and to automatically apply a jet or jets of water to such underwater surface to clean the same, said apparatus comprising: a. an elongated conduit means having jet means adapted to apply one or more jets of water to said underwater surface, said conduit means having also inlet means through which water under pressure may be introduced; b. means permanently supporting said conduit means beneath said underwater surface; c. means for supplying water under pressure to said inlet means, and d. means for automatically effecting motion of the water issuing from said jet means relative to said underwater surface to cause impingement of water on different portions of said underwater surface in automatic sequence, said means comprising a plurality of separate conduits each having an inlet and having an outlet jet orifice, the said outlet jet orifices being located beneath different horizontally spaced areas of said underwater surface, said apparatus also comprising sequential valving means adapted to supply water to the several inlets in sequence and to repeat a sequential cycle of application of jets of water to the underwater surface.