Joints and connections – Articulated members – Rotatable
Patent
1993-06-07
1995-03-21
Kwon, John T.
Joints and connections
Articulated members
Rotatable
403 78, 59 95, F16D 112
Patent
active
053990420
ABSTRACT:
A swivel utilizing multiple angular contact bearings arranged in such a manner as to provide preloading for two-directional axial and radial thrust stability. This bearing arrangement of angular contact ball bearings applied to swivels adds capabilities of compression and side loading. The boring operations for which the present invention is primarily intended commonly take place in a pressurized environment of liquid and dirt slurry, thereby making sealing of the bearing cavity critical to the exclusion of foreign material which would damage the bearings. The rigidity of the assembly provided by the preloaded bearings creates critical stability in the seal area. The swivel provides the capability for bi-directional axial load support, radial load support, and a sealed inner bearing structure for both passive swivel and power driven swivel products. A particular load capacity is obtained through application of counterpoised arrangements of particular sizes of angular contact ball bearings.
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Champagne Thomas M.
Kwon John T.
Roberts Jon L.
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