Water jet propulsion boat
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsNoboru Kobayashi, Yoshiki Futaki
Life of this patent
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Abstract
A watercraft propelled by a jet propulsion unit that is positioned within a tunnel in the underside of the watercraft. The jet propulsion unit is supported for pivotal movement about a horizontally extending transverse pivot access and the housing of the jet propulsion unit is divided into separate components so that the water inlet portion may be rotated to an upwardly facing service position without rotation of the discharge nozzle, steering nozzle, or reverse thrust buckets associated therewith. As a result, an extremely rigid support is accomplished which nevertheless permits ease of servicing.
Claims62
A water jet propelled boat comprised of a hull, a jet propulsion unit having an outer housing comprised of a water inlet portion having a water inlet opening, an impeller portion containing an impeller for drawing water through said water inlet portion from a body of water in which said boat is operating and a discharge nozzle portion for discharging water from said water inlet portion for propelling said boat, at least said water inlet portion being rotatable relative to another of said portions about an axis for raising said water inlet opening from a downwardly facing position to an elevated position when the boat remains in the body of water, and means for supporting said discharge nozzle portion against rotation relative to said hull when said water inlet portion is rotated between its positions.
A water jet propelled boat comprised of a hull, a pair of spaced apart support arms pivotally carried by said hull about a pivot axis, a jet propulsion unit having a housing assembly comprised of a water inlet portion, an impeller portion containing an impeller for drawing water through said water inlet portion from a body of water in which said boat is operating and a discharge nozzle for discharging water from said impeller portion for propelling said boat, and means connecting said support arms to said jet propulsion unit housing assembly for pivotal movement of said jet propulsion unit relative to said hull upon pivotal movement of said support arms.
A water jet propelled boat comprised of a hull, a unitary assembly comprised of a supporting cradle, a jet propulsion unit having a water inlet portion through which water may be drawn from a body of water in which said boat is operating, an impeller portion containing an impeller for drawing water through said water inlet portion, and a discharge nozzle for discharging the water pumped by said impeller for propelling said boat, and means for mounting said jet propulsion unit on said cradle for movement of at least said water inlet portion relative thereto, and means for mounting said unitary assembly to said hull.
Dependencies are inferred from the claim text.