Abstract: Disclosed is a dynamic sealing device configured to provide sealing between at least a first part and at least a second part having a relative rotational movement in relation to the first part. The device includes a seal provided with a first lip and with a second lip extending from a body portion, the first lip facing the second lip, the seal being formed from a first predetermined material having a first coefficient of friction, and a ring formed from a second predetermined material different from the first predetermined material and having a second coefficient of friction different from the first coefficient of friction. The ring is securely connected with the seal at the location of the body portion and the first coefficient of friction of the first predetermined material forming the seal is greater than the second coefficient of friction of the second predetermined material forming the ring.

Abstract: A dynamic sealing device provides sealing between at least a first part and at least a second part having a relative rotational movement in relation to the first part. The device is formed by a seal including a body portion; a first main lip extending from the body portion; a second main lip extending from the body portion, the first lip facing the second lip; the first and second lips being configured to be energized by a first fluid so as to seal at least one of the first part and second part. The seal further includes at least one additional lip located on the body portion remotely from the first and second lips and being configured to be energized by a second fluid so as to seal at least the other of the first part and second part.

Abstract: A high voltage electrical swivel includes a first part and a second part, which are mobile relative to each other and form a closed internal chamber, each of the two parts including at least one electrical connector; and at least one electrical track electrically linked to a connector of one of the two parts and at least one brush assembly electrically linked to a connector of the other of the two parts, the at least one brush assembly cooperating with the at least one electrical track to establish an electrical contact, the at least one electrical track and the at least one brush assembly being housed in the closed internal chamber. The closed internal chamber is filled with a dielectric insulating gas having a dielectric strength greater than that of the air surrounding the electrical swivel.