Patent ID: 8449196

Claim:
A rotation-guiding device which comprises a fixed support and a movable support which is able to rotate around the fixed support about an axis of rotation, and an interface between the fixed support and the movable support, the interface comprising: a bearing designed to guide the movable support in its rotation about the fixed support, a flexible dynamic seal designed to provide a seal-tightness between the fixed support and the movable support, the dynamic seal having a friction face and being mounted between a friction track secured to one of said supports and a mechanical structure secured to the other support, and which includes a metal spring creating a contact force between the friction face and the friction track to provide said seal-tightness between the friction track and the mechanical structure, wherein the dynamic seal is mounted parallel to the axis of rotation so that the contact force is exerted parallel to the axis of rotation, and wherein the fixed support comprises spacers and the dynamic seal further comprises oblongs distributed along the dynamic seal to accommodate the spacers.