Hydraulically Balanced Radial Seal
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United States of America Patent
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Issued Date -
Apr 8, 2010
app pub date -
Oct 8, 2008
filing date -
Oct 8, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A hydraulically balanced radial seal is configured so that the hydraulic pressure of the fluid being sealed causes the primary dynamic sealing lip to be axially stretched longer and also incorporates a secondary static sealing lip whose beaded interior locks into a receiving groove in the exterior surface of the dynamic sealing lip and effects a seal between the two lips. The secondary static sealing lip being so disposed as to cause it to be compressed and shortened by the hydraulic pressure of the fluid being sealed an amount comparable to that which the primary dynamic sealing lip is being stretched under the same pressure, keeping the two lips locked together. This unique construction maintains the favorable hydraulic balance initially designed into the seal, enabling it to accommodate hydraulic pressures of over 225 psi.
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