Marine propulsion device
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsTakahiro Oguma, Atsushi Kumita
Life of this patent
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Abstract
A marine propulsion device includes an engine, a driving shaft coupled to the engine and configured to transmit power, a first cooling water pump configured to be driven by the driving force of the driving shaft and to pump cooling water to cool the engine, a cooling water path configured to supply the cooling water sent by the first cooling water pump to the engine, and a pressurization mechanism arranged in a water passage upstream of a suction port of the first cooling water pump and configured to apply pressure to the cooling water supplied to the suction port of the first cooling water pump.
Claims18
A marine propulsion device comprising:
- an engine;
- a driving shaft coupled to the engine and configured to transmit power;
- a first cooling water pump configured to be driven by a driving force of the driving shaft and to pump cooling water to cool the engine;
- a cooling water path configured to supply the cooling water pumped by the first cooling water pump to the engine;
- and
- a pressurization mechanism arranged in a water passage upstream of a suction port of the first cooling water pump and configured to apply pressure to the cooling water supplied to the suction port of the first cooling water pump;
- wherein
- the pressurization mechanism includes a rotating body configured to be driven by the driving force of the driving shaft.
A marine propulsion device comprising:
- an engine;
- a driving shaft coupled to the engine and configured to transmit power;
- a cooling water pump configured to be driven by a driving force of the driving shaft and to pump cooling water to cool the engine;
- a cooling water path configured to supply the cooling water pumped by the cooling water pump to the engine;
- and
- a vaned wheel arranged in a water passage upstream of a suction port of the cooling water pump.
A marine propulsion device comprising:
- an engine;
- a driving shaft coupled to the engine and configured to transmit power;
- a first cooling water pump configured to be driven by a driving force of the driving shaft and to pump cooling water to cool the engine;
- a cooling water path configured to supply the cooling water pumped by the first cooling water pump to the engine;
- and
- a second cooling water pump arranged in a water passage upstream of a suction port of the first cooling water pump.
Dependencies are inferred from the claim text.