Planet gear for air turbine starter system
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United States of America Patent
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Jun 7, 2016
Grant Date -
Apr 18, 2013
app pub date -
Oct 12, 2011
filing date -
Oct 12, 2011
priority date (Note) -
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Abstract
A planet gear for use in an air turbine starter is formed of a first part having a set of gear teeth at a first axial location. A shaft extends axially away from the first set of gear teeth. A second part is interference fit on the first part, with the second part having a second set of gear teeth. The second part is mounted on the shaft of the first part. An outer diameter of the shaft is selected to be significantly larger than an inner diameter of a cylindrical portion of the second part which is interference fit on the shaft. A ratio of the outer diameter to the inner diameter is between 1.0005 and 1.0100. A planetary gear system, an air turbine starter and a method of installing a planet gear are also disclosed.
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