Outboard motor
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorAtsushi Kumita
Life of this patent
Estimating the term…
Abstract
An outboard motor includes an upper case, a lower case including an oil reservoir chamber, an oil flow passage, and an oil flow passage shutoff valve. When the lower case is detached from the upper case, the oil flow passage is separated into an upper oil flow passage in the upper case and a lower oil flow passage in the lower case and connected to the oil reservoir chamber. The oil flow passage shutoff valve opens the lower oil flow passage in a state in which the lower case has been attached to the upper case. The oil flow passage shutoff valve closes the lower oil flow passage in a state in which the lower case has been detached from the upper case.
Claims14
An outboard motor comprising:
- an engine;
- a drive shaft that extends downwardly from the engine and that is rotated by the engine;
- a gearing connected to a lower end of the drive shaft;
- a propeller shaft to which a propeller is attached and to which rotation of the drive shaft is transmitted via the gearing;
- an upper case located below the engine and that houses the drive shaft;
- a lower case including an oil reservoir chamber housing the gearing and lubrication oil, the lower case being located below the upper case and being attachable to and detachable from the upper case;
- an oil flow passage including an upper oil flow passage provided in the upper case and a lower oil flow passage provided in the lower case and that is connected to the oil reservoir chamber, the oil flow passage guiding lubrication oil when lubrication oil in the oil reservoir chamber is replaced, the oil flow passage being separated into the upper oil flow passage and the lower oil flow passage when the lower case is detached from the upper case;
- and
- an oil flow passage shutoff valve that opens the lower oil flow passage in a state in which the lower case has been attached to the upper case, and that closes the lower oil flow passage in a state in which the lower case has been detached from the upper case.
Dependencies are inferred from the claim text.