This invention relates to a paper friction material and a method of manufacturing the same, wherein the paper friction material is configured such that dispersibility and bondability are increased between a filler and a matrix. The paper friction material which is suitable for use in a vehicle, includes a friction base including pulp and a coating layer formed on the friction base using a mixture of latex and a functional material. The OH reactive group of the pulp and the aromatic ring of the latex are hydrogen-bonded so that the friction base and the coating layer are coupled with each other.

The friction material composition, friction material and friction member are provided, in which copper, having serious environmental effects, is not contained or is not contained at more than 0.5 mass % of copper, rust adhering force is low, rust delamination is difficult to occur, the friction material composition includes a binder, an organic filler, an inorganic filler, and a fibrous substrate, wherein the friction material composition contains no copper as an element or contains not more than 0.5 mass % of copper, and contains fibrillated aramid fiber as the fibrous substrate, 0.2 to 2 mass % of sodium carbonate and 2.5 to 10 mass % of calcium hydroxide.

Rotary damper (15), comprising a casing (17), an intermediate element (31) mounted on the casing (17), a braking fluid provided between the casing (17) and the intermediate element (31) so as to brake the movement of the intermediate element (31) relative to the casing (17), a rotor (50) mounted on the intermediate element (31) rotably about an axis of rotation (x), and a unidirectional coupling arranged between the intermediate element (31) and the rotor (50). The unidirectional coupling comprises at least one radial block (60) arranged between a radially outer surface (52) of the rotor (50) and a radially inner surface (34) of the intermediate element (31), and at least one actuating lobe (55) formed on the rotor (50) and projecting radially from the radially outer surface (52) thereof, the radial bock (60) comprising a wedge part (61) designed to be engaged by the actuating lobe (55) of the rotor (50) during rotation in the first direction of rotation (A) so as to push the radial block (60) in the centrifugal direction and lock it between the rotor (50)

[Object] To provide the friction material for the disc brake such as an automobile, which is manufactured by forming the NAO friction material composition, enabling to restrain the brake vibration during braking in a high temperature. [Means to Resolve] In the friction material for the disc brake pad, which is manufactured by forming the NAO friction material composition that does not contain the copper component but contains the binder, the fiber base, the organic friction modifier, the inorganic friction modifier, and the lubricant, the friction material composition contains 1-4 weight % of the cashew dust as the organic friction modifier relative to the entire amount of the friction material composition, 7-12 weight % of the muscovite as the inorganic friction modifier relative to the entire friction material composition, and 0.5-5 weight % of the aluminum particle as the inorganic friction modifier relative to the entire amount of the friction material composition.

A decentralized electrohydraulic brake unit for braking a wheel of a motor vehicle. The brake unit includes a brake caliper and a brake caliper piston which can be moved axially in the brake caliper via a drive device and via which hydraulic pressure can be applied to a brake piston. A brake pad is disposed on the brake piston. The brake caliper piston and the brake piston are connected to one another via an elastic element, via which the brake piston can actively be retracted after a braking operation.

A heat dissipation structure for a brake pad is provided for being assembled to a caliper device. The caliper device includes a caliper body, and the caliper body has a receiving space. The heat dissipation structure includes: a main body, integrally extruded from aluminum and cut to have an ultimate appearance, including a plate body and a heat dissipation portion integrally extending from the plate body, the plate body for being disposed on the caliper body and at least partially extending into the receiving space, when the main body is assembled to the caliper body, the heat dissipation portion is exposed outside the caliper body. A brake pad assembly is further provided, including a heat dissipation structure as described above, further including a brake pad, the brake pad disposed on a lateral face of the plate body.

A method for forming a friction facing comprises placing a bonding powder mix in to a die, and placing a performance powder mix in to the die. Pressing the performance powder mix and the bonding powder mix creates a compact. Sintering the compact forms a friction facing. A clutch disc assembly can be formed. A clutch disc can comprise a mounting hole for securing a friction facing and a backer plate can comprise a pass-through hole. A mounting mechanism joins the mounting hole to the pass-through hole. The mounting mechanism comprises a head-height for a portion of the mounting mechanism that is mounted near the sintered compact. The bonding layer comprises a thickness corresponding to the head-height of the mounting mechanism.

A friction material comprising: (a) at least one lubricant, wherein the at least one lubricant includes an amount of graphite, and wherein at least about 30 percent by weight of the graphite has a particle size of greater than about 500 microns using a sieve analysis; (b) at least one metal containing constituent for imparting reinforcement, thermal conductivity, and/or friction when the friction material is brought into contact with a movable member, wherein the at least one metal containing constituent includes iron and an iron containing compound; (c) a micro-particulated material; (d) one or more filler materials; (e) optionally at least one processing aid; (f) a balance being an organic binder, wherein the organic binder has less than 1 percent by weight of free phenol; wherein the friction material is free of asbestos and substantially devoid of copper.

A disk brake piston system having a piston having a metallic outer wall surrounding a central axis, the outer wall being of a material and a thickness which that could be formed by deep drawing; a metallic front wall closing one end of the outer wall, the front wall including a curved area extending toward an interior of the piston, the front wall being of a material and having a thickness that could be formed by deep drawing; and a sleeve positioned at least partially within the piston and configured to interface with an interior side surface of the outer wall such that the sleeve and the piston are restrained from rotating relative to one another around an axis parallel to the central axis, the sleeve comprising a flat or curved internal surface, having a non-circular cross-section, wherein the sleeve comprises a polymeric material.

A power coupler for transferring rotary power from a rotary power device to a load device includes a shear thickening fluid (STF) and a chamber that contains the STF. The power coupler further includes a drive shaft housed radially within a drive side section of the chamber and protruding outward from an end of the chamber for coupling to the rotary power device. The power coupler further includes a load shaft housed radially within a load side section of the chamber and protruding outward from another end of the chamber for coupling to the load device. The power coupler further includes a drive turbine housed radially within the drive side section and coupled to the drive shaft. The power coupler further includes a load turbine housed radially within the load side section at a fixed operational distance from the drive turbine and coupled to the load shaft.