The cryogenic rotary coupling comprises segments of a cryogenic line that are
capable of turning relative to each other about a pivot axis of the rotary coupling.
Radial retaining elements and axial retaining elements define the pivot axis of
the rotary coupling. One of the segments comprises a vacuum-insulated double-walled
female portion and the other segment comprises a vacuum-insulated double-walled
male portion engaged at least in part in the female portion. A first sealing gasket
is interposed between a free end of the male portion engaged in the female portion
and one of the retaining means. A second sealing gasket is interposed between a
free end of the female portion surrounding the male portion and the other one of
the retaining elements. A heater device is disposed in the vicinity of the second gasket.
