Marine propulsion device including an overdrive transmission

Marine propulsion – Screw propeller – Having transmission

Patent

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Details

74368, B63H 513

Patent

active

044001630

ABSTRACT:
The overdrive transmission for a marine propulsion device includes a first drive gear mounted for common rotation with an input shaft connected to a power source, such as an internal combustion engine, a first driven gear mounted for common rotation with a drive shaft drivingly connected to a propeller shaft carrying a propeller, and one-way, overrunning clutch connecting the input and drive shafts. The first drive gear meshes with a second driven gear having fewer gear teeth than the first drive gear and mounted on a counter shaft for common rotation therewith. The first driven gear meshes with a second drive gear mounted on the counter shaft for rotation relative thereto. The counter shaft is selectively drivingly connected to the second drive gear to drive the drive shaft at a rotational speed higher than that of the input shaft.

REFERENCES:
patent: 1795135 (1931-03-01), Molly
patent: 1979077 (1934-10-01), Pilaar
patent: 2534134 (1950-12-01), Kirkpatrick
patent: 2861461 (1958-11-01), Kreidler
patent: 3372601 (1968-03-01), Orcutt et al.
patent: 3532068 (1970-10-01), Lamburn
patent: 4173939 (1979-11-01), Strang

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