| 摘要 |
<p>A swivel assembly includes a lower flange assembly having lower body portion, a first rim portion extending around the lower body portion, and a first fluid passageway. An upper flange assembly includes an upper body portion, a second rim portion extending around the upper body portion, and a second fluid passageway. A mating collar is positioned around the upper body portion and secured to the first rim portion such that the second rim portion is rotatably positioned between the mating collar and the first rim portion and the first fluid passageway is fluidly coupled to the second fluid passageway. Bearing elements are disposed between the first rim portion and the second rim portion and between the second rim portion and the mating collar such that the upper flange assembly and a combination of the lower flange assembly with the mating collar are rotatable with respect to each other.</p> |
