A brake disk, the main body of which has been produced from gray cast iron, is coated on its annular brake surfaces with a metallic coating by way of laser deposition welding. In the coating, which includes a welding material with an austenitic structure or at least structural components, a state of internal compressive stress is set by plastic deformation which affects the external outer layer thereof and in one form is performed by a rolling tool.

Magnet assemblies for electromechanical assemblies of elevator systems are described. The magnet assemblies include a magnet and first and second block assemblies arranged on opposite sides of the magnet. In some configurations, the block assemblies each include a respective friction engagement surface and are formed of layers of sheet metal, with a portion of the layers having blade teeth that form a friction engagement surface for engagement with a guide rail. In some configurations, each of the block assemblies are formed from powder metal sintering and include a monolithic tooth configuration configured to form a friction engagement surface for engagement with a guide rail. In some configurations each of the block assemblies includes an abrasive coating configured to form a friction engagement surface for engagement with a guide rail.

A friction disk includes a friction disk core having a first surface with multiple channels extending radially across the first surface. The friction disk may further include a first wear liner having two wear liner segments each configured to be coupled to the first surface of the friction disk core to form an annular liner and each including a wear surface, a non-wear surface, and a rib extending from the non-wear surface and configured to be received by one of the multiple channels.

The invention relates to a power unit, in particular for a hybrid vehicle, including a reciprocating-piston engine and at least one generator drivingly connected to the engine, wherein the engine has at least two pistons guided in at least two cylinders in a tandem arrangement, and two crankshafts, which are connected to the pistons by connection rods that run in opposite directions, and are mechanically coupled in the same phase. The engine includes a hub-hub connection with a first connection joining a first hub to a second hub such that an angular position between the first hub and the second hub is continuously adjustable on installation. The hub-hub connection also has a second connection in the form of a connection disk configured, dimensioned and arranged with support surfaces on each of which the first hub and the second hub rest. The connection disk has a matrix with hard material elements embedded therein, in particular diamond chips, which are arranged in the support surfaces for frictional engagement of the hubs.

A system, and associated method, for reducing oxidation of a friction disk may include a braking assembly comprising the friction disk and a coolant loop coupled to the braking assembly, with the coolant loop being configured to circulate liquid coolant from the braking assembly. That is, the coolant loop may be configured to reduce the temperature of the braking assembly, thus reducing the rate/extent of oxidation of the friction disks and potentially enabling the concentration of oxygen around the braking assembly to be reduced.

A method of manufacture for a carbon/carbon part including a method to remove contamination from an intermediate product of the carbon/carbon part and furnace utilizing a gaseous reducing agent hydrogen gas to reduce the contaminates, thereby causing the contaminates to transition to a gaseous state at relatively lower temperatures. A method to remove contamination from an intermediate product of the carbon/carbon part and furnace utilizing hydrogen gas to reduce the contaminates, thereby causing the contaminates to transition to a gaseous state at relatively lower temperatures.

An interference fit connection for a shaft comprises a hub having a conical through opening and a reduction sleeve having a cylindrical through opening for arrangement on the shaft and a conical outer circumference, where the cone angle of the conical outer circumference corresponds to the cone angle of the corresponding conical through opening of the hub. The hub is a two-component part having a first component made of steel and a second component made of fiber-reinforced plastics material. The second component made of fiber-reinforced plastics material is designed as a ring which is arranged on the outer circumference of a sleeve portion of the first component, which sleeve portion surrounds the reduction sleeve, so as to surround this sleeve portion. The fiber-reinforced plastics material has a higher modulus of elasticity than the steel of the first component.

Brake rotors for bicycles are described herein. An example brake rotor for a bicycle includes a carrier to be coupled to a hub of the bicycle. The brake rotor also includes a brake track having braking surfaces to be engaged by brake pads. The brake track is disposed radially outward of the carrier. The brake track has a first thickness and the carrier has a second thickness greater than the first thickness. The brake track is coupled to the carrier such that the brake track is axially movable relative to the carrier while being radially and circumferentially constrained relative to the carrier.

Brake pads are prepared using a formulation of friction material of the copper-free type (Low-Steel or Organic Non-Asbestos) and at least one friction surface of a brake disc, which is intended to cooperate with the brake pad, is covered with an anti-wear and anti-corrosion coating consisting of a surface layer of chromium carbide particles (Cr3C2) dispersed in a metallic matrix consisting of a NiCr alloy, and coupled to a second layer consisting of selected combinations of metallic materials, chosen from the group consisting of: Cr3C2-high density NiCr, NiAl alloys, FeNiCrMoSiC alloys, metallic nickel, NiCr alloys, and/or any combination of the above.

A friction lining material mixture for brake or clutch linings, containing 8 to 22% by volume of binder, 3 to 20% by volume of organic fibers, 1 to 20% by volume of further organic compounds, 0 to 20% by volume of inorganic fibers, 5 to 50% inorganic oxides, 0 to 15% inorganic silicates, 1 to 20% inorganic sulfur or inorganic sulfur compounds, 0 to 10% metals or metal alloys and fillers, in particular petroleum coke and/or baryte. The friction linings produced from the friction lining material mixture are distinguished by excellent braking performance and excellent braking comfort and therefore combine the specific positive properties of both Low Steel (LS) and Non-Asbestos Organic (NAO) materials.