Long-lived rotary ball bearing for reciprocating applications and method of lubricating same
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United States of America Patent
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Oct 16, 2001
Issued Date -
N/A
app pub date -
Nov 9, 2000
filing date -
Mar 23, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A rotary bearing includes concentric radially spaced-apart inner, intermediate and outer rings whose opposing surfaces define inner and outer ball tracks. An inner array of balls roll along the inner track and an outer array of balls roll along the outer track and a viscous lubricant is present between the rings. When the inner and outer rings are angularly reciprocated relative to one another and that reciprocation is changed, the intermediate ring is moved intermittently in a selected direction about the rotation axis so that the balls recirculate about the axis and redistribute lubricant along the tracks.
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