Abstract: The present invention relates to a sealing device including a sealing circular piece, an inner ring and an outer ring, with one being able to rotate relative to an axis. The circular piece is arranged between the two rings and comprises two circular lips arranged in a groove inclined with respect to the axis of rotation. The groove is provided on the outer face of the inner ring. An attachment profile is fixed in an orifice formed in the outer ring. The inclination of the groove makes it possible to increase the potential contact surface area perpendicular to the axis of rotation of the crown ring, since, for a given distance between an outer edge and an inner edge of a ring, the groove can be longer, improving the resistance of the top lip to expulsion. The two lips are prestressed in the groove allowing for a better hold.

Abstract: A sealing device comprising a sealing circular piece, an inner ring and an outer ring, one of the two rings being able to rotate relative to an axis, the circular piece being arranged between the two rings and comprising two circular lips arranged in a groove at right angles to the axis of rotation, a top lip and a bottom lip substantially at right angles to the top lip, the bottom lip has a radius of curvature directed towards the interior, the groove being provided on the outer face of the inner ring and a third circular lip pressing on the outer face of the inner ring, and a part is fixed in an orifice formed in the outer ring.

Abstract: A wind turbine rotor hub bearing where the series of mobile members include more than two annular series of such members whereof at least two have different median diameters which are arranged in more than two rows scaled along the bearing rotational axis, with two end rows each comprising a series of roller bearings having individually a rotational axis transversal to the axis and at least an intermediary row of mobile members comprising balls.

Abstract: The present invention relates to a sealing device including a sealing circular piece, an inner ring and an outer ring, with one being able to rotate relative to an axis. The circular piece is arranged between the two rings and comprises two circular lips arranged in a groove inclined with respect to the axis of rotation. The groove is provided on the outer face of the inner ring. An attachment profile is fixed in an orifice formed in the outer ring. The inclination of the groove makes it possible to increase the potential contact surface area perpendicular to the axis of rotation of the crown ring, since, for a given distance between an outer edge and an inner edge of a ring, the groove can be longer, improving the resistance of the top lip to expulsion. The two lips are prestressed in the groove allowing for a better hold.

Abstract: A wind turbine rotor hub bearing where the series of mobile members include more than two annular series of such members whereof at least two have different median diameters which are arranged in more than two rows scaled along the bearing rotational axis, with two end rows each comprising a series of roller bearings having individually a rotational axis transversal to the axis and at least an intermediary row of mobile members comprising balls.

Abstract: For a bearing mounted between two concentric races rotating relative to each other, and forming an annular gap that accommodates the bearing and is closed by seals, at least one grease tube is provided between the periphery of one of the two races and the annular gap, and is connected to a corresponding grease reservoir. At least one main grease tube opens into the annular gap in an angular sector where an overpressure occurs, a corresponding main grease reservoir is adapted to collect grease flowing from the annular gap through the main grease tube due to the overpressure that may occur within the annular gap in the angular sector.

Abstract: The butterfly valve comprises a disk which is provide with at least one protuberance over at least a portion of at least one of its faces. Quite unexpectedly, the use of such a disk makes it possible to improve considerably the quality of the cleaning of the valve and to reduce the time required for cleaning operations.

Abstract: In a system for coupling a toothed starter ring to a support connected to the output shaft of an internal combustion engine, a complementary substantially cylindrical peripheral surface of the ring is fixed over at least a part of its extent to a substantially cylindrical peripheral surface of the support in such a manner that the ring can deform slightly in the radial direction toward the shaft to reduce the maximum stresses exerted on the ring during a starting operation.

Abstract: A system for assembling at least two pressurized fluid control members is made up of an interface to which the control members, which are essentially pneumatic, are fixed. The interface includes fluid pipes connecting their feed and outlet orifices and at least two faces with an angle &agr; between them from 5° to 175° and each of which receives at least one of the control members.

Abstract: A piston type valve includes a piston moving in a cylindrical seat. The piston is fastened to an operating rod extending along the axis of the cylindrical seat. The perimeter of the piston carries an elastomer O-ring providing the seal between the piston and the cylindrical seat. The piston includes two piston members fixed axially together by clamping means. Each of the two members includes an annular groove of substantially circular arc shaped cross section open toward the groove on the other member. The elastomer O-ring is housed between the two annular grooves and clamped between them by the clamping means.

Abstract: A valve comprises a body including a chamber and two superposed closures moving in the chamber and the bottom part of the chamber includes a first seat for one closure and a second seat for the other closure. The closures are each carried by a swing mobile between a position in which the closure bears in sealed fashion on the corresponding seat and a position in which the closure is spaced from the seat. The space between the two closures contains an elastic material membrane closing a chamber into which a compressed air feed discharges. The membrane can therefore be inflated and pressed in sealed fashion onto the top closure to close and seal the inlet of a passage which discharges into a space between the two closures.

Abstract: A gate-valve comprising a gate-valve body inside of which a gate-valve seat is formed having a stop surface delimiting the orifice of a pipe, a valve moving in a linear direction in the gate-valve body, the valve having an upper shoulder and a lower shoulder axially distanced from the upper shoulder, and a seal fitted between the two shoulders intended to stop the orifice of the pipe, the pipe having an internal peripheral surface which is parallel with the direction of displacement of the valve, characterized in that the valve comprises a limiting means to limit the flow of a liquid between a surface of the valve and the internal peripheral surface of the pipe during the displacement of the valve while the seal is not completely removed from the orifice of the pipe.

Abstract: The invention concerns a drainage unit in particular for aircraft sanitation systems.The technical problem resides in providing such a unit which is extremely simple, reliable and effective.According to the invention, this unit, which is formed by a mobile truck (1) carrying a collecting reservoir (12), comprises depression-producing means (18, 19) connected to the collecting reservoir (12) so as to produce the vacuum therein and take-off means (14) mounted in a support (15) and capable of being temporarily connected to the sanitation systems of the aircraft for transferring waste materials and waters to the reservoir (12), the depression-producing means (18, 19) for the reservoir, the take-off means (14) and the reservoir (12) being disposed on the chassis (4) of the truck (1) in the form of a compact assembly inscribed within the frame of the chassis (4).The invention is principally employed for the rapid draining of aircraft sanitation systems.