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US 4,331,432 AGranted
Hydraulically actuated two-speed transmission for a marine propulsion device
AssigneeOutboard Marine Corporation
InventorClarence E. Blanchard
Life of this patent
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AssigneeOutboard Marine Corporation
InventorClarence E. Blanchard
Estimating the term…
Disclosed herein is a marine propulsion device including an input shaft drivingly connected to a power source, a lower unit having a rotatably mounted drive shaft extending in coaxial relation to the input shaft, a rotatably mounted propeller shaft carrying a propeller and drivingly connected to the propeller shaft, and a two-speed transmission drivingly connecting the input shaft to the drive shaft. The transmission includes a third shaft rotatably mounted in parallel relation to the input shaft and the drive shaft, a first pair of meshing gears including a first drive gear mounted on the input shaft and a first driven gear mounted on the third shaft, a second pair of meshing gears including a second drive gear mounted on the third shaft and a second driven gear mounted on the drive shaft, and a one-way overrunning clutch drivingly connecting one of the shafts to a gear mounted on the shaft when the rotational speed of the input shaft is less than a predetermined value. The transmission also includes a fluid pressure actuated selectively actuatable clutch for drivingly connecting the input shaft and the drive shaft when the rotational speed of the input shaft is greater than a first value. The transmission includes a housing and a pair of the meshing gears are disposed in the housing to form a fluid pump for providing fluid to the fluid pressure actuated clutch, the fluid pump developing fluid pressure which increases as the rotational speed of the gears increases.
A marine propulsion device comprising an input shaft drivingly connected to a power source, a lower unit having a rotatably mounted drive shaft extending in coaxial relation to said input shaft, a rotatably mounted propeller shaft carrying a propeller, means drivingly connecting said drive shaft to said propeller shaft, and a two-speed transmission drivingly connecting said input shaft to said drive shaft and including a first drive means between said input shaft and said drive shaft for selectively drivingly connecting said input shaft and said drive shaft and including a third shaft rotatably mounted in parallel relation to said input shaft and said drive shaft, a first pair of meshing gears including a first drive gear mounted on said input shaft and a first driven gear mounted on said third shaft, and a second pair of meshing gears including a second drive gear mounted on said third shaft and a second driven gear mounted on said drive shaft, and a one-way overrunning clutch drivingly connecting one of said shafts to a gear mounted on said one shaft when the rotational speed of said input shaft is less than a predetermined value, said first drive means having an input-output speed ratio with a first value, and second drive means for selectively drivingly connecting said input shaft and said drive shaft when the rotational speed of said input shaft is greater than said first value, said second drive means including a fluid pressure actuated selectively actuatable clutch for drivingly connecting said input shaft and said drive shaft, and means for providing fluid to said fluid pressure actuated clutch including a housing, a pair of said meshing gears being disposed in said housing and forming a fluid pump developing a fluid pressure which increases as the rotational speed of said gears increases, said second drive means having an input-output speed ratio with a second value greater than said first value.
A marine propulsion device comprising a rotatably mounted input shaft drivingly connected to a power source, a lower unit having a rotatably mounted drive shaft, a propeller shaft rotatably mounted in said lower unit and carrying a propeller, and means drivingly connecting said drive shaft to said propeller shaft, and a two-speed transmission drivingly connecting said input shaft to said drive shaft and including a third shaft rotatably mounted in parallel relation to said input shaft and said drive shaft, first drive and driven gears in meshing engagement, second drive and driven gears in meshing engagement, means fixedly connecting said second driven gear to said drive shaft, means fixedly connecting two of said first drive gear to said input shaft, said first driven gear to said third shaft, and said third shaft to said second drive gear, a one-way overrunning clutch connecting the other of said first drive gear to said input shaft, said first driven gear to said third shaft, and said third shaft to said second drive gear, and a fluid pressure actuated clutch for selectively drivingly joining said input shaft and said drive shaft for common rotation, and means for providing fluid to said fluid pressure actuated clutch including a fluid pump driven by at least one of said input shaft, said drive shaft and said third shaft and developing a fluid pressure which increases as the rotational speed of said gears increases.
A marine propulsion device comprising a rotatably mounted input shaft drivingly connected to a power source, a lower unit having a rotatably mounted drive shaft extending in coaxial relation to said input shaft, a propeller shaft rotatably mounted in said lower unit and carrying a propeller, means drivingly connecting said drive shaft to said propeller shaft, and a two-speed transmission drivingly connecting said input shaft to said drive shaft, said two-speed transmission including a third shaft rotatably mounted in parallel relation to said input shaft and said drive shaft, first drive and driven gears in meshing engagement, second drive and driven gears in meshing engagement, means fixedly connecting one of said first drive gear to said input shaft and said first driven gear to said third shaft, a one-way overrunning clutch connecting the other of said first drive gear to said input shaft and said first driven gear to said third shaft, means fixedly connecting said second drive gear to said third shaft, means fixedly connecting said second driven gear to said drive shaft, and a fluid pressure actuated clutch for selectively drivingly connecting said input shaft and said drive shaft, and means for providing fluid to said fluid pressure actuated clutch including a housing and a pair of meshing gears disposed in said housing and forming a fluid pump developing a fluid pressure which increases as the rotational speed of said gears increases.
A marine propulsion device comprising a rotatably mounted input shaft drivingly connected to a power source, a lower unit having a rotatably mounted drive shaft, a propeller shaft rotatably mounted in said lower unit and carrying a propeller, and means drivingly connecting said drive shaft to said propeller shaft, and a two-speed transmission drivingly connecting said input shaft to said drive shaft and including a third shaft rotatably mounted in parallel relation to said input shaft and said drive shaft, first drive and driven gears in meshing engagement, second drive and driven gears in meshing engagement, means fixedly connecting three of said first drive gear to said input shaft, said first driven gear to said third shaft, said second drive gear to said third shaft, and said second driven gear to said drive shaft, a one-way overrunning clutch connecting the other of said first drive gear to said input shaft, said first driven gear to said third shaft, said second drive gear to said third shaft, and said second driven gear to said drive shaft, and a fluid pressure actuated clutch for selectively drivingly joining said input shaft and said drive shaft for common rotation.
Dependencies are inferred from the claim text.