The invention at hand refers to a wheel disc brake assembly comprising a wheel rim, a coupler ring and an annular brake disc arranged in a concentric manner, wherein an outer surface of the coupler ring is connected to an inner surface of the wheel rim and an inner surface of the coupler ring is connected to an outer surface of the annular brake disc. The wheel disc brake assembly further comprises a caliper with at least two brake pads facing each other, wherein the caliper surrounds at least a part of the inner surface of the annular brake disc and the at least two brake pads are configured to press against opposite side faces of the annular brake disc.

The wet friction member 1 of the invention includes a core plate 2 formed in a flat ring shape, a friction part 3 arranged in a ring shape. The friction part 3 has segment pieces including rectangular shaped G.sub.1 to G.sub.4: G.sub.1 in which a lower right corner of rectangular piece is notched; G.sub.2 in which an upper left corner of rectangular piece is notched; G.sub.3 in which an upper right corner of rectangular piece is notched; G.sub.4 in which a lower left corner of rectangular piece is notched. The friction part 3 has arrangements T.sub.1 and T.sub.2: T.sub.1 in which G.sub.1 and G.sub.2 are arranged in a manner a right side of G.sub.1 and a left side of G.sub.2 face each other; T.sub.2 in which G.sub.3 and G.sub.4 are arranged in a manner a right side of the G.sub.3 and a left side of G.sub.4 face each other.

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 present invention relates to a disk (2) for a disk clutch or brake (4) comprising a first friction surface (28) and a second friction surface (34) facing away from the first friction surface (28), in which recesses and/or grooves (40, 42, 44) are provided. A first type of recesses and/or grooves (40), which is generated by a material shaping and/or a material casting and/or a non-material removing first manufacturing method, is provided in the first friction surface (28), and a second type of recesses and/or grooves (42), which is generated by a material removing second manufacturing method, is provided in the second friction surface (34). In addition, the present invention relates to a disk clutch and brake (4) comprising such a disk (2) and a method for producing such a disk (2).

A brake piston is described. The brake piston is configured for use in a disk brake system, the piston comprising: a body having an outside width perpendicular to a central axis; a footing disposed at a distal end of the piston; wherein the footing is configured to exert force on a brake pad during actuation of the disk brake system; the footing having a face configured to contact the brake pad, the face having a length and a width, wherein the length is longer than the outside width of the body, and the length is greater than the width.

A brake system that includes a first brake piston; a second brake piston; a first rotary to linear mechanism disposed inside of the first brake piston; a second rotary to linear mechanism disposed inside of the second brake piston; and a motor. The motor is configured to generate torque and supply the generated torque generally equally to both of the first and the second rotary to linear mechanism during a brake apply. A compressible member may be provided between a first member and the first brake piston, a second member and the second brake piston, or both.

Rotary damper (15), comprising a casing (17), an intermediate element (31) mounted movably 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) rotatably 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) and the intermediate element (31).

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.

An electromechanical brake caliper comprising a caliper body comprising a housing containing a piston and a member for driving a mechanism for moving the piston. The driving member comprises a threaded body and a head comprising a face supported on a bottom of the housing, the supported face being provided with a non-friction coating.

A brake piston is described. The brake piston is configured for use in a disk brake system, the piston comprising: a body having an outside width perpendicular to a central axis; a footing disposed at a distal end of the piston; wherein the footing is configured to exert force on a brake pad during actuation of the disk brake system; the footing having a face configured to contact the brake pad, the face having a length and a width, wherein the length is longer than the outside width of the body, and the length is greater than the width.