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US 2003/0224671 A1Published application
Shift mechanism for marine propulsion unit
AssigneeYamaha Marine Kabushiki Kaisha
InventorsGoichi Katayama, Masanori Takahashi
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AssigneeYamaha Marine Kabushiki Kaisha
InventorsGoichi Katayama, Masanori Takahashi
Estimating the term…
An outboard motor incorporates a driveshaft and a propulsion shaft driven by the driveshaft. The driveshaft carries a pinion. The propulsion shaft carries forward and reverse gears. The pinion always meshes with the forward and reverse gear and drives the forward and reverse gears in opposite directions relative to each other. A hydraulic forward clutch mechanism couples the forward gear with the propulsion shaft. A hydraulic reverse clutch mechanism couples the reverse gear with the propulsion shaft. A shift actuator selectively operates the forward clutch mechanism or the reverse clutch mechanism to provide forward, reverse and/or neutral running conditions for the outboard motor.
A marine propulsion unit comprising a prime mover, a first shaft driven by the prime mover, a second shaft driven by the first shaft, the second shaft driving a propulsion device, the first shaft carrying a first gear, the second shaft carrying second and third gears, the first gear always meshing with the second and third gears, the first gear driving the second and third gears in opposite directions relative to each other, a first hydraulic clutch mechanism configured to couple the second gear with the second shaft, a second hydraulic clutch mechanism configured to couple the third gear with the second shaft, and a hydraulic control system selectively operating either the first hydraulic clutch mechanism or the second hydraulic clutch mechanism.
A marine propulsion unit comprising a prime mover, a first shaft driven by the prime mover, the first shaft extending generally vertically, a second shaft driven by the first shaft, the second shaft extending generally horizontally, the second shaft driving a propulsion device, the first shaft carrying a first gear, the second shaft carrying second and third gears both always meshing with the first gear, the first gear driving the second and third gears in opposite directions relative to each other, a first hydraulic clutch mechanism selectively connecting the second gear with the second shaft, a second hydraulic clutch mechanism selectively connecting the third gear with the second shaft, the first and second hydraulic clutch mechanisms together interposing the second and third gears therebetween.
A marine propulsion unit comprising a first shaft, a second shaft selectively driven by the first shaft to drive a propulsion device, the first shaft carrying a first gear, a second gear being continuously driven by the first gear, a hydraulic clutch mechanism operating between the second gear and the second shaft so as to drivingly couple the second gear with the second shaft, and a hydraulic control system selectively actuating the hydraulic clutch mechanism.
Dependencies are inferred from the claim text.