Ball bearing
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United States of America Patent
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-
Jan 27, 2004
Grant Date -
Apr 24, 2003
app pub date -
Mar 28, 2002
filing date -
Mar 28, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ball bearing is described, which comprises an outer ring having on its inner periphery an outer raceway, an inner ring having on its outer periphery an inner raceway, plural balls rotatably disposed between the outer raceway and the inner raceway, a cage holding the plural balls in a freely rotatable manner, and a grease packed in a space between the outer raceway and the inner raceway, wherein the inner peripheral surface of each pocket of the cage contains a spherical part consisting of a spherical concave surface whose radius of curvature is slightly larger than that of each ball and a curved part which has the radius of curvature being larger than that of the spherical part and is smoothly continuous from the end of the spherical part toward the end thereof on the opening side of the pocket.
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