Seal assembly
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United States of America Patent
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Jan 5, 2021
Grant Date -
Sep 26, 2019
app pub date -
Jun 12, 2019
filing date -
Oct 17, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A seal assembly for sealing a shaft configured to rotate in a main direction, the seal assembly including a stiffener and at least one elastomer seal member connected to the stiffener, the elastomer seal member including a seal region having a seal section configured to seal against a shaft and seal a to-be-sealed space, the seal section including a first screw thread web structure configured to pump a leakage fluid toward the to-be-sealed space when the shaft rotates in the main direction, a second annular, circumferentially extending web structure configured to sealingly abut on the shaft at least when the shaft is not rotating, and a third annular, circumferentially extending web structure configured to sealingly abut on the shaft at least when the shaft is not rotating, wherein the second web structure is axially spaced from the third web structure.
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