Vacuum pump with a bearing cage having a threaded groove
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United States of America Patent
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Feb 28, 2012
Grant Date -
Sep 25, 2008
app pub date -
Mar 20, 2008
filing date -
Mar 23, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A vacuum pump includes a high-speed rotor, and an anti-friction bearing for rotatably supporting the rotor and including an inner ring, an outer ring, a rolling body, and a cage for the rolling body both the rolling body and the cage being located in an intermediate space defined by the outer and inner rings, with the cage having a threaded groove in a section of its surface adjacent to the inner ring for insuring a continuous feeding of a lubricant to the bearing.
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