Abstract: Disclosed is a self-lubricating composite friction part (1) that can be subjected, during operation, to temperatures that are at least equal to 250° C. The part includes, along the friction surface (2), a single layer of a material consisting of weft and warp yarns made of polytetrafluoroethylene, the material being impregnated with a thermostable resin having a glass transition temperature that is at least equal to 250° C. It is applied to a reinforcing layer (3).

Abstract: Disclosed is a part comprising a metal substrate, a non-hydrogenated amorphous ta-C or aC carbon coating that coats the substrate, and an undercoat which is based on chromium (Cr), carbon (C) and silicon (Si) and is disposed between the metal substrate and the amorphous carbon coating and to which the amorphous carbon coating is applied, characterized in that the undercoat included, at its interface with the amorphous carbon coating, a ratio of silicon in atomic percent to chromium in atomic percent (Si/Cr) of 0.3 to 0.60, and a ratio of carbon in atomic percent to silicon in atomic percent (C/Si) of 2.5 to 3.5.

Abstract: A guide device includes: a metal component provided with a friction surface intended to receive a mating part in sliding frictional contact; and a detection sensing system of a wear of the friction surface or of a clearance between the friction surface and the mating part. The detection system includes one or more sensors; and a wireless communication system is connected to the detection system and configured to transmit information relating to wear or clearance out of the guide device.

Abstract: A guide device includes: a metal component in the form of a bush provided with a friction surface intended to receive a mating part in frictional contact by sliding with oscillation; a wear sensing system of the friction surface having one or more sensors; and a wireless communication system connected to the detection system and configured to transmit information relating to the wear of the friction surface out of the guide device. The sensor or sensors are arranged exclusively on one longitudinal side or on two longitudinal sides of the bush, each longitudinal side being defined over at most two fifths of the length of the annular bush.

Abstract: The present invention relates to an optical device (1) suitable for transmitting/reflecting electromagnetic radiation in a wavelength range of the electromagnetic spectrum, said device (1) comprising at least: a first coating layer (10) made of a first material, a substrate (50) made of a material that is different from the first material, and surface texturing (60) forming cavities (61) in the device (1); wherein a lower layer (50) disposed directly below the first coating layer (10) is either a second coating layer (20) made of a material that is different from the first material, or the substrate (50); wherein the lower layer (50) has a determined thickness (E50); characterised in that the cavities (61) extend through the coating layer (20) and are sunk into the lower layer (50) through at least part of the thickness (E50).

Abstract: The present invention relates to an optical device (1), suitable for transmitting/reflecting electromagnetic radiation in a wavelength range of the electromagnetic spectrum, said device (1) comprising at least: a substrate (10) made of a first material, a coating layer (20) made of a second material that is different from the first material, and surface texturing (30) forming cavities (31) in the device (1), characterized in that the cavities (31) extend through the coating layer (20) and are partially sunk into the substrate (10).

Abstract: A member for guiding an element mobile in oscillation or rotation is presented. The member has a body made of a hardened metallic material, provided with a bore for assembling the mobile element, having cavities that are distributed discontinuously in the bore and capable of acting as grease reserves, and having optional grease supply. In the bore are defined a bearing surface outside of the cavities and the grease supply, and a non-bearing surface in the cavities and the grease supply. The bore includes at least one zone with: cavities having a depth of between 2 and 5 mm, and a quantity of grease in the cavities per bearing surface of between 0.05 and 0.3 g/cm2. A mechanical system having such a member and a method for manufacturing such a member is also contemplated.

Abstract: A guiding member, having a body provided with a bore for mounting a mobile element is presented. The body consists of a metallic material. The bore has a surface layer treated against jamming over a diffusion depth of less than or equal to 0.6 mm. The surface layer has a hardness of greater than or equal to 500 Hv1 over a depth of between 5 and 50 ?m.

Abstract: A hinged component with one degree of freedom includes at least two concentric rings, movable in rotation in relation to one another around a central axis, defining a friction interface therebetween and including: an outer ring having an inner friction surface and an inner ring having an outer friction surface and an inner friction surface intended to receive a movable member guided by the component in rotation, oscillation and/or translation.

Abstract: Disclosed is a self-lubricating composite friction part (1) that can be subjected, during operation, to temperatures that are at least equal to 250° C. The part includes, along the friction surface (2), a single layer of a material consisting of weft and warp yarns made of polytetrafluoroethylene, the material being impregnated with a thermostable resin having a glass transition temperature that is at least equal to 250° C. It is applied to a reinforcing layer (3).

Abstract: A method for obtaining a ferrous alloy part that supports a very high seizure load with very low dispersion includes steps of covering the part with an iron sulphide coating having an appropriate thickness and Fe/S ratio, where the coating is selected from among those with surfaces having a fractal dimension that is at least equal to 2.6.

Abstract: In a surface treatment process for mechanical parts, for conferring on the parts a high resistance to wear and corrosion and a roughness propitious to lubrication, nitriding of the part is followed consecutively by oxidation of the part. The nitriding is applied by immersing the part in a molten salt nitriding bath free of sulfur-containing species at a temperature from approximately 500° C. to approximately 700° C. The oxidation is carried out in an oxidizing aqueous solution at a temperature less than approximately 200° C.

Abstract: The metal alloy based on aluminium and titanium includes an aluminium content between 80 and 90 atomic percent and a titanium content between 10 and 20 atomic percent. The alloy is microcrystalline and outside thermodynamic equilibrium, the alloy is thereby resistant to oxidation and corrosion and has at the same time remarkable adhesion to polymer materials. The metal alloy can be in the form of a reflecting coating of a thickness ranging between 0.01 and 3 &mgr;m, covered with a protective film of a polymer material. A mirror having specular reflectivity not less than about 65%, good resistance to corrosion and oxidation includes a substrate of a polymer material supporting the reflecting coating.

Abstract: A device for measuring the forces exerted by each leg, particularly during ambulatory activity, including at least one assembly provided with a powered treadmill in a frame consistency of a rigid structure engaging the various portions of the treadmill for drawing the treadmill. The rigid structure is supported by force measuring sensors secured to a common ground-engaging plane for measuring vertical and tangential forces.

Abstract: A device for training and measuring the physical efforts of a user of a nonmotorized rolling vehicle arranged on a turning assembly capable of exerting a load moment imparts a cyclical braking moment which passes from a preestablished value to a zero value dependent on the speed of the vehicle. The braking moment is controlled by detection and measurement of the speed or acceleration of the vehicle in order to drive the vehicle at a constant or substantially constant speed.

Abstract: Apparatus for weighing a person that is confined to a bed that includes a series of modular units for supporting a bed frame and sensors associated with each of the modular units that are capable of performing in combination a weighing function.

Abstract: In a method of increasing the wear resistance and the corrosion resistance f opposed bearing surfaces of parts subjected to reciprocal friction, in particular when the product of the pressure distributed over the bearing surfaces by the relative speed of the latter exceeds 0.4 MPa.m/s, thermochemical diffusion of nitrogen is effected by nitriding or nitrocarburizing in a molten salt bath at a temperature of 570.degree. C..+-.15.degree. C. followed by an oxidizing or phosphating surface chemical reaction providing resistance to wet corrosion. The nitriding or nitrocarburizing molten salt bath is made up of alkaline carbonates and cyanates and further contains sulfur-containing substances in the following percentages by weight:30%<CNO.sup.- <45%15%<CO.sub.3.sup.2- <25%15%<Na.sup.+ <25%20%<K.sup.+ <30%1%<Li.sup.+ <6%1 ppm<S.sup.2- <100 ppmThe time for which parts are immersed in the bath is between 15 minutes and 45 minutes.

Abstract: A process for improving the wear and corrosion resistance of ferrous metal arts consists in immersing the parts, which have previously been treated using a nitriding, diffusion technique, in a molten salt bath comprising carbonates, nitrates, hydroxides and oxygenated alkali metal salts. The relative anionic proportions by weight of carbonates, nitrates and hydroxides expressed in terms of their sodium salts and corresponding to the active phase, that is the liquid in the bath, are as follows:11<CO.sub.3.sup.2- <2319<NO.sub.3.sup.- <376<OH.sup.- <19and the proportion by weight of oxygenated alkali metal salts, expressed in equivalents of Cr.sub.2 O.sub.7.sup.2- is as follows: 0.05<oxygenated anions<0.41. This process guarantees a high degree of reproducibility of results regardless of the type of treated part.

Abstract: Articulated plates (L) are assembled in combination with at least two drive rums supported by a framework (6). The plates (L) present longitudinally, two by two, complementary guiding and articulation profiles (R) and (C) defined to create at least one continuous flat face. The plates are coupled to one another by flexible links (1).

Abstract: In a nitriding method intended to confer upon ferrous metal parts, in addon to surface properties resulting directly from nitriding, corrosion resistance comparable to that obtained when the nitriding treatment is followed by an oxidizing treatment, in particular in a salt bath, the parts are treated by immersion for an appropriate time in a molten salt bath containing in the known manner essentially alkali metal carbonates and cyanates and a small quantity of a sulfur-containing substance. The parts are held at a positive potential relative to a counter-electrode in contact with the bath so that a high current flows through the bath from the parts to the counter-electrode and the concentration of cyanides formed by secondary reaction is kept below 6%. It is preferable to use a constant average current; the typical current densities are from 300 amperes to 800 amperes per m.sup.2, the typical temperature ranges are from 450.degree. C. to 650.degree. C.