Patent ID: 7316363

Claim:
A rotating nozzle assembly, comprising: a rotatable shaft having a bore to transport a cryogenic fluid therethrough, the rotatable shaft having an upstream portion associated with a feed chamber and a downstream portion; a seal disposed within the feed chamber and surrounding at least a portion of the rotatable shaft; a seal backup disk disposed proximate the seal, the seal backup disk including an orifice surrounding an outside diameter of the rotatable shaft, the orifice having a diameter such that, when the cryogenic fluid is flowing through the bore of the rotatable shaft, the rotatable shaft can freely rotate while the seal prevents the cryogenic fluid from seeping past the seal; and one or more bearings disposed within a bearing chamber and operable to allow the rotation of the rotatable shaft, wherein the one or more bearings are located downstream of the seal backup disk and comprise two angular contact bearings and one radial contact bearing.