Gerotor device roller pocket geometry
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United States of America Patent
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Oct 20, 2015
Grant Date -
Feb 6, 2014
app pub date -
Oct 7, 2013
filing date -
Jul 29, 2011
priority date (Note) -
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Abstract
A gerotor device includes a rotor having outwardly extending teeth and a stator having inwardly extending teeth. The inwardly extending teeth are formed by rollers each of which is received in a respective roller pocket in the stator. Each roller pocket has a maximum pocket width measured perpendicular to a pocket centerline. Each roller pocket defines a roller bearing surface having a first side that follows a first radius and a second side on an opposite side of the centerline that follows a second radius. Each radius is greater than ½ the maximum pocket width. Each roller pocket has an edge pocket width between a first pocket edge where the pocket transitions to a generally cylindrical section in the stator and a second pocket edge on an opposite side of the centerline. The edge pocket width is less than the maximum pocket width.
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