Sealing apparatus
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United States of America Patent
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Issued Date -
Jan 4, 2018
app pub date -
Sep 19, 2017
filing date -
Mar 31, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
In a sealing apparatus, a lip tip portion of a seal lip of an elastic body part is defined by a sealing side surface and an atmospheric side surface, connected through a lip tip with each other. The lip tip portion includes a circumferential projection and a screw portion on the atmospheric side surface. The circumferential projection extends parallel to the lip tip. The screw portion includes a plurality of parallel screw projections and a plurality of bilge screw projections. The parallel screw projections are arranged at equal pitch intervals in parallel with each other between the lip tip and the circumferential projection. The bilge screw projections are arranged at equal pitch intervals in parallel with each other from the circumferential projection toward the atmospheric side. The bilge screw projections do not overlap the adjacent bilge screw projections in a direction of axis with each other.
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