Propulsion device

Claim 1

IN COMBINATION, A BOAT HULL HAVING A TRANSOM, A WELL AFT IN SAID HULL HAVING FORWARD AND SIDE WALLS AND HAVING ITS REAR SIDE OPENING THROUGH SAID TRANSOM, SAID WELL HAVING A BOTTOM OPENING COMMUNICATING WITH THE SEA DOWNWARDLY THROUGH THE BOTTOM OF SAID HULL, AND A PROPULSION DEVICE MOUNTED IN SAID WELL, SAID PROPULSION DEVICE COMPRISING A GENERALLY HORIZONTALLY DISPOSED SUBSTANTIALLY INVOLUTE-SHAPED ENCLOSURE HAVING A CENTRAL OPENING AND ARRANGED IN SAID WELL WITH ITS CENTRAL OPENING COMMUNICATING DOWNWARDLY THROUGH THE BOTTOM OPENING OF SAID WELL, SAID ENCLOSURE HAVING ITS REAR SIDE SUBSTANTIALLY COMPLETELY OPEN FOR COMMUNICATION REARWARDLY OVERBOARD THROUGH THE OPEN REAR SIDE OF SAID WELL AND SAID TRANSOM, ENCLOSURE-MOUNTING MEANS IN SAID WELL MOUNTING SAID ENCLOSURE FOR ROTATIVE ADJUSTMENT ABOUT A GENERALLY VERTICAL AXIS THROUGH SAID CENTRAL OPENING, A HOLLOW ROTOR IN SAID ENCLOSURE HAVING AN INLET PASSAGEWAY COMMUNICATING DOWNWARDLY THROUGH SAID CENTRAL OPENING TO THE SEA AND HAVING AN OUTLET PASSAGEWAY COMMUNICATING GENERALLY RADIALLY OUTWARDLY FROM SAID INLET PASSAGEWAY, ROTOR-MOUNTING MEANS MOUNTING SAID ROTOR FOR ROTATION GENERALLY AXIALLY OF SAID INLET PASSAGEWAY TO MOVE SAID OUTLET PASSAGEWAY ANGULARLY PAST SAID OPEN REAR SIDE OF SAID ENCLOSURE, DRIVE MEANS CONNECTED TO SAID ROTOR FOR ROTATING THE LATTER TO PUMP SEA WATER THROUGH SAID ROTOR FOR DISCHARGE FROM SAID OUTLET PASSAGEWAY BOTH DIRECTLY OVERBOARD THROUGH SAID REAR OPEN SIDE OF SAID ENCLOSURE AND INTO SAID ENCLOSURE FOR SUBSEQUENT IMPULSION OVERBOARD THROUGH THE REAR OPEN SIDE OF SAID ROTOR, AND DEFLECTOR MEANS CARRIED BY SAID ENCLOSURE IN THE REAR REGION THEREOF FOR DIRECTING BOTH THE DIRECT OUTLET DISCHARGE AND SUBSEQUENTLY IMPELLED OUTLET DISCHARGE IN SUBSTANTIALLY PARALLEL FLOW.