Watercraft with a couple of water jet propulsion units
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorNoboru Kobayashi
Life of this patent
Estimating the term…
Abstract
Several embodiments of watercraft hulls propelled by dual jet propulsion units. The jet propulsion units are either received within a common tunnel or a pair of separate tunnels of the watercraft hull and are moveable for servicing and to bring the jet propulsion units out of the water when the watercraft is not being operated but still is in the body of water.
Claims31
A watercraft having a hull with a transom, tunnel means at the rear of said hull and a V-bottom and a pair of separate jet propulsion units each mounted in said tunnel means in generally parallel relationship to each other each on a respective side of said V-bottom, each of said jet propulsion units having its own normally downwardly facing inlet for receiving water on a respective side of said V-bottom from a body of water in which said watercraft in operating, an impeller section and a discharge nozzle for discharging water rearwardly through said transom on a respective side of said V-bottom for propelling said hull.
A watercraft having a hull with a transom and a pair of separate jet propulsion units each mounted in said hull in generally parallel relationship to each other, each of said jet propulsion units having its own normally downwardly facing inlet for receiving water from a body of water in which said watercraft is operating, an impeller section and a discharge nozzle for discharging water rearwardly through said transom for propelling said hull, said jet propulsion units being mounted in tunnel means formed at the rear of said hull.
A watercraft having a hull and a pair of jet propulsion units each mounted in tunnel means formed at the rear of said hull in generally parallel relationship to each other, each of said jet propulsion units having an inlet for receiving water from a body of water in which said watercraft is operating, an impeller section and a discharge nozzle for discharging water propelling said hull, said tunnel means comprising a common tunnel in which each of said jet propulsion units are positioned.
A watercraft having a hull and a pair of jet propulsion units each mounted in tunnel means formed at the rear of said hull in generally parallel relationship to each other, each of said jet propulsion units having an inlet for receiving water from a body of water in which said watercraft is operating, an impeller section and a discharge nozzle for discharging water for propelling said hull, said tunnel means comprising a pair of tunnels each receiving a respective one of the jet propulsion units, said tunnels being separated by a common bulkhead.
A watercraft having a hull with a V configuration and a pair of jet propulsion units each mounted in said hull in generally parallel relationship to each other, each on a respective side of said V configuration, each of said jet propulsion units having an inlet for receiving water from a body of water in which said watercraft is operating, an impeller section and a discharge nozzle for discharging water for propelling said hull, said propulsion units being mounted in tunnel means formed at the rear of said hull.
A watercraft as set forth in claim 19 wherein the tunnel means comprises a pair of tunnels each receiving a respective one of the jet propulsion units.
A watercraft having a hull and a pair of jet propulsion units each mounted in said hull in generally parallel relationship to each other, each of said jet propulsion units having an inlet for receiving water from a body of water in which said watercraft is operating, an impeller section and a discharge nozzle for discharging water for propelling said hull, said jet propulsion units being supported for rotation relative to said hull about an axis aligned with their impeller axes for changing their orientation relative to said hull.
A watercraft having a hull and a pair of jet propulsion units each mounted in said hull in generally parallel relationship to each other in tunnel means formed at the rear of said hull, each of said jet propulsion units having an inlet for receiving water from a body of water in which said watercraft is operating, an impeller section and discharge nozzle for discharging water for propelling rearwardly through said transom on a respective side of said V-bottom for propelling said hull.
A watercraft having a hull with a transom and a pair of separate jet propulsion units each mounted in said hull in generally parallel relationship to each other, each of said jet propulsion units having its own normally downwardly facing inlet for receiving water from a body of water in which said watercraft is operating, an impeller section and a discharge nozzle for discharging water rearwardly through said transom for propelling said hull, said jet propulsion units each having at least its inlet supported for rotation relative to the hull about axes extending longitudinally of said hull.
A watercraft having a hull with a transom and a pair of separate jet propulsion units each mounted in tunnel means formed at the rear of the hull in generally parallel relationship to each other, each of said jet propulsion units having its own normally downwardly facing inlet for receiving water from a body of water in which said watercraft is operating, an impeller section and a discharge nozzle for discharging water through said transom for propelling said hull, said jet propulsion units being supported for movement relative to said hull for changing their orientation relative to said hull.
Dependencies are inferred from the claim text.