Patent ID: 7789172

Claim:
A bearing assembly for a rotating control device, comprising: an outer barrel having an upper end portion, a lower end portion and a central bore extending therebetween; an inner barrel at least partially disposed within the central bore of the outer barrel; bearing units coupled between said barrels for providing concentric alignment of said barrels and allowing rotation therebetween; a cover plate fixedly attached to the upper end portion of the outer barrel, wherein an upper end portion of the inner barrel is exposed within a central opening of the cover plate and wherein an outside edge portion of an upper surface of the cover plate encompassing the central opening is downwardly angled with respect to a central axis of the cover plate; a seal carrying structure attached to the upper end portion of the inner barrel; a seal body having a mounting portion and a wiper portion extending from the mounting portion into contact with said downwardly angled portion of the cover plate, wherein the mounting portion is displaceably engaged with a seal-carrying portion of the seal carrying structure; and biasing means provided between the mounting portion of the seal body and the seal carrying structure, wherein said biasing means resiliently biases the wiper portion into contact with said downwardly angled portion of the cover plate such that the entire seal body is resiliently displaceable with respect to the seal carrying structure.