Seal Assembly with Eccentricity Tracking
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United States of America Patent
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Issued Date -
Apr 11, 2019
app pub date -
Oct 11, 2017
filing date -
Oct 11, 2017
priority date (Note) -
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Abstract
A seal assembly includes a casing coupled with a body and an annular elastomeric seal member having a base portion coupleable with a casing and a cantilever portion radially deflectable with respect to the base portion. The cantilever portion has an end connected with the base portion and a free end with sealing lip. The lip has a sealing surface extending about a centerline and is engageable with a shaft. An annular rigid tracking member is attached to the seal member proximal to the first end of the seal cantilever portion and is spaced axially from the seal lip. The tracking member has a centerline and a tracking surface engageable by the shaft outer surface so that the tracking member centerline and the seal lip centerline each remain coaxial with the shaft axis during rotation of the shaft. Further, a support member prevents axial displacement of the seal member.
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