Jet propelled water craft

Claim 1

IN COMBINATION WITH A WATER CRAFT HAVING A HULL INCLUDING A WATER INTAKE OPENING, A REARWARD FACING DISCHARGE ORIFICE AND PUMPING MEANS FOR DRAWING WATER THROUGH THE OPENING FOR DISCHARGE THROUGH A NOZZLE PASSAGE TO THE ORIFICE AS A PROPULSIVE JET FOR MOVING THE CRAFT FORWARD, VALVE MEANS ADJUSTABLE TO CONTROL FLOW THROUGH THE PASSAGE TO MAINTAIN A DETERMINED RATIO OF JET TO CRAFT SPEED COMPRISING A PIVOTED, ROTARY VALVE HAVING A PART CYLINDRICAL SHAPE AND INCLUDLING A SUBSTANTIALLY RADIAL WALL FORMING A PART OF THE NOZZLE PASSAGE, THE PIVOT OF THE ROTARY VALVE BEING OFFSET FROM THE AXIS OF THE NOZZLE PASSAGE AND THE ROTARY VALVE BEING HOLLOW AND HAVING ITS INTERIOR CONSTANTLY COMMUNICATING WITH THE NOZZLE PASSAGE, A HOUSING IN WHICH THE ROTARY VALVE IS ROCKABLE HAVING SPACED ALIGNED PORTS COMMUNICATING WITH THE INTERIOR OF THE ROTARY VALVE, SPACED PLATE VALVES COAXIAL WITH THE ROTARY VALVE AND CONTIGUOUS TO AND MASKING THE ALIGNED PORTS, RESPECTIVELY, DURING FORWARD MOVEMENTS OF THE