| abstract |
A fluid conducting swivel joint is disclosed which has a sealing system effective against the leakage of fluids of extreme temperature. The joint consists of two housings mounted for relative rotation about an axis, the housings having a fluid passage therethrough. A first annular sealing chamber, having a seal therein, surrounds the passage, and is located adjacent the passage at the interface between the housings. Each housing has a radial flange at said interface, said flanges spaced apart to define an annular tempering chamber therebetween. A second annular sealing chamber, having a seal therein, is positioned between the flanges outboard of the tempering chamber. A temperature controlling chamber is mounted on one or both of said flanges. One of the housings may have an annular insulating chamber, and insulating members may be used to additionally insulate the second sealing chamber. |