Outboard motor
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United States of America Patent
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Apr 23, 2013
Grant Date -
Sep 20, 2012
app pub date -
Jun 1, 2012
filing date -
Feb 8, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
An outboard motor includes an engine that generates power and a transmission device arranged to change the speed of rotation of the engine and to transmit the rotation to a propeller. The transmission device includes a planetary gear type transmission mechanism arranged to shift to any of a plurality of speed positions, and the planetary gear type transmission mechanism is controlled to shift such that a sun gear and planetary gears unitarily rotate when a speed position is a normally used speed position. The outboard motor achieves a reduction in load normally caused by engagements between gears in a normally used speed position and also achieves significant improvement in durability of the gears.
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