Abstract: A lubricator comprises a container of variable volume holding a lubricant and having an opening for dispensing the lubricant. An electromechanical or electrochemical actuator operated by a control circuit makes it possible to reduce the volume of the container. An electrical circuit for displaying the state of the lubricator comprising a light source can emit at least one alarm light signal. A lid affixed to the container in a removable manner constitutes a housing for the electrical signal display circuit and defines a reference axis of the lubricator. A light diffuser guides the light emitted by the light source towards numerous light outlets distributed along the circumference of the lid in a manner that at least one of the light outlets is visible regardless of the position of an observer facing the lubricator and is located on a circle of observation centered on the reference axis of the lubricator.

Abstract: A roller for a rolling bearing has an outer surface revolving about an axis of symmetry and a lateral face arranged on either side of the outer surface. The roller is intended to rotate in the bearing about the axis of symmetry while bearing on the outer surface. The roller has two recesses produced respectively on one lateral face extending along the axis of symmetry. The recesses have an opening formed on the lateral face and are separated axially by a material bridge. The recesses are defined by a lateral revolving surface, the shape whereof is divergent tapered from the opening to the material bridge.

Abstract: A motor vehicle bump stop has an upper retainer, a lower retainer and rolling bodies arranged between the retainers to enable the relative rotation thereof, the retainers are arranged to form together at least one annular space defined laterally by two respectively inner and outer axial walls. The stop has a set of at least two mounted seal rings stacked axially in the space with an axial clearance. The rings are mounted on the inner or outer wall and form a radial clearance with the outer or inner wall, so as to form a sealing baffle in the space.