Reverse bucket for jet propulsion device, jet propulsion device for marine vessel, and marine vessel

A reverse bucket for a jet propulsion device comprising:

• an inlet region facing a discharge opening of a deflector in a backward moving posture to make a marine vessel move backward and to receive water discharged from the discharge opening;
• an outlet region to discharge the water received by the inlet region to outside the jet propulsion device;
• and
• a guide region to guide the water received by the inlet region to the outlet region;
• wherein
• the inlet region, the guide region, and the outlet region define a recess portion including a continuous opening and having a continuous concave curved surface over an entire region thereof.

A jet propulsion device for a marine vessel comprising:

• a deflector to rotate leftward or rightward;
• and
• a reverse bucket including:
• a vertical ridge line that faces a discharge opening of the deflector in a backward moving posture to make the marine vessel move backward;
• a first inlet region and a second inlet region separated by the ridge line so that the first inlet region is positioned on a left side of the ridge line and the second inlet region is positioned on a right side of the ridge line, and face the discharge opening in the backward moving posture to receive water discharged from the discharge opening;
• a first outlet region to discharge the water received by the first inlet region to outside the jet propulsion device;
• a second outlet region to discharge the water received by the second inlet region to the outside of the jet propulsion device;
• a first guide region to guide the water received by the first inlet region to the first outlet region;
• and
• a second guide region to guide the water received by the second inlet region to the second outlet region;
• wherein
• the first inlet region, the first guide region, and the first outlet region define a first recess portion;
• the second inlet region, the second guide region, and the second outlet region define a second recess portion;
• the first recess portion has a continuous concave curved surface over an entire region thereof and includes a first opening that opens a side of the first recess portion facing the discharge opening of the deflector in the backward moving posture;
• and
• the second recess portion has a continuous concave curved surface over an entire region thereof and includes a second opening that opens a side of the second recess portion facing the discharge opening of the deflector in the backward moving posture.

A marine vessel comprising:

• at least one jet propulsion device including:
• a deflector to rotate leftward or rightward;
• and
• a reverse bucket including:
• a vertical ridge line that faces a discharge opening of the deflector in a backward moving posture to make the marine vessel move backward;
• a first inlet region and a second inlet region separated by the ridge line so that the first inlet region is positioned on a left side of the ridge line and the second inlet region is positioned on a right side of the ridge line, and face the discharge opening in the backward moving posture to receive water discharged from the discharge opening;
• a first outlet region to discharge the water received by the first inlet region to outside of the jet propulsion device;
• a second outlet region to discharge the water received by the second inlet region to the outside of the jet propulsion device;
• a first guide region to guide the water received by the first inlet region to the first outlet region;
• and
• a second guide region to guide the water received by the second inlet region to the second outlet region;
• wherein
• the first inlet region, the first guide region, and the first outlet region define a first recess portion;
• the second inlet region, the second guide region, and the second outlet region define a second recess portion;
• the first recess portion has a continuous concave curved surface over an entire region thereof and includes a first opening that opens a side of the first recess portion facing the discharge opening of the deflector in the backward moving posture;
• and
• the second recess portion has a continuous concave curved surface over an entire region thereof and includes a second opening that opens a side of the second recess portion facing the discharge opening of the deflector in the backward moving posture.