Balancer device of internal combustion engine
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United States of America Patent
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Jun 30, 2015
Grant Date -
Jul 10, 2014
app pub date -
Jan 6, 2014
filing date -
Jan 9, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A balancer device of an internal combustion engine, has a drive gear engaged with an input gear to which a rotation force is transmitted from a crankshaft; a balancer drive shaft to which the rotation force is transmitted from the drive gear and which has a balancer weight; a balancer drive gear rotating integrally with the balancer drive shaft; a balancer driven gear engaged with the balancer drive gear; and a balancer driven shaft rotating integrally with the balancer driven gear and having a balancer weight. At least one of the drive gear, the balancer drive gear and the balancer driven gear is provided, on both axial direction side surfaces thereof, with ring-shaped grooves whose diameters are different from each other. The ring-shaped grooves are formed up to a depth from the surface of the gear at which both the ring-shaped grooves overlap each other in the axial direction.
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