Improvement in the joints used in the apparatus is subjected to the difference of the internal pressures and / or external

摘要

P improvement to the seals used on the equipment subjected to the differences in the internal pressures and / or external. Joint intended to be used on an apparatus which, in service, is subjected to a difference in pressures inside and / or external, and which comprises a certain number of annular elements joined end to end so as to be able to rotate with respect to each other about a common axis, characterized in that the opposite end faces of each pair of annular members define a hermetic cavity intended to contain a fluid, and in that means are provided for varying the pressure of the fluid contained in said cavity in response to variations of the difference in pressures inside and / or external. This seal is more particularly adapted to be used in the diving suits in deep water. / p