High speed gear sized and configured to reduce windage loss
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United States of America Patent
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-
Nov 12, 2013
Grant Date -
Dec 13, 2012
app pub date -
Apr 18, 2012
filing date -
Apr 21, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A gear and drive system utilizing the gear include teeth. Each of the teeth has a first side and a second side opposite the first side that extends from a body of the gear. For each tooth of the gear, a first extended portion is attached to the first side of the tooth to divert flow of fluid adjacent to the body of the gear to reduce windage losses that occur when the gear rotates. The gear may be utilized in drive systems that may have high rotational speeds, such as speeds where the tip velocities are greater than or equal to about 68 m/s. Some embodiments of the gear may also utilize teeth that also have second extended portions attached to the second sides of the teeth to divert flow of fluid adjacent to the body of the gear to reduce windage losses that occur when the gear rotates.
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