High pressure product swivel
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United States of America Patent
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-
Mar 3, 1987
Grant Date -
N/A
app pub date -
Dec 17, 1984
filing date -
Dec 17, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotatable swivel comprising a swivel body, a ball bearing assembly, and a primary upper seal axially offset from a primary lower seal for sealing a conduit chamber is disclosed. Pressurization of the conduit chamber of the swivel in cooperation with the differential axial offset of the primary seals creates axial pre-loading of the swivel operably aiding in the sealing of the conduit chamber and maintaining the concentricity of the bearing assembly between a rotatable outer ring and a stationary inner ring and providing wear compensation for the swivel. Secondary upper and lower seals are disclosed whereby if the primary seals fail to retain pressure in the conduit chamber, the respective secondary seal maintains the initial axial loading of the failed primary seal.
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