1978-02-22
1979-11-13
Sotelo, Jesus D.
115 34R, 74336R, B63H 513
Patent
active
041739396
ABSTRACT:
Disclosed herein is a marine propulsion device incorporating a two-speed transmission including a first drive gear which is mounted for common rotation with an input shaft drivingly connected to an engine and which meshes with a first driven gear mounted for rotation coaxially with a drive shaft drivingly connected to the propeller shaft and further including a second drive gear which is mounted for rotation coaxially with and independently of the input shaft and which meshes with a second driven gear mounted for common rotation with the drive shaft. The drive shaft is drivingly connected to the first driven gear by a one-way, overrunning clutch and is driven by the input shaft through the first drive and driven gears at low and moderate engine speeds. At high engine speeds, a second clutch is actuated to drivingly connect the second drive gear to the input shaft and the drive shaft thereafter is driven by the input shaft through the second drive and driven gears which have a gear ratio greater than the gear ratio of the first drive and driven gears. The second clutch preferably is a centrifugal clutch which is arranged to provide automatic shifting between the first drive and driven gears and the second drive and driven gears at a predetermined engine speed.
REFERENCES:
patent: 2219812 (1940-10-01), Hochstetter
patent: 3492966 (1970-02-01), Kiekhaefer
patent: 3532068 (1970-10-01), Lamburn
patent: 3884097 (1975-05-01), Avramidis et al.
Outboard Marine Corporation
Sotelo Jesus D.
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