Pipe joints or couplings – With fluid pressure seal – Swivel with flange in socket
Patent
1984-12-17
1987-03-03
Husar, Cornelius J.
Pipe joints or couplings
With fluid pressure seal
Swivel with flange in socket
285136, 285168, 285190, 285276, 285281, F16L 3900
Patent
active
046470778
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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Ethridge Charles O.
Pedersen Kristen I.
Husar Cornelius J.
Knight Anthony
Sofec, Inc.
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