A friction material comprises a base and a porous friction generating layer penetrating into and integral with the base. The base presents a bonding surface. The porous friction generating layer presents a friction generating surface facing opposite the bonding surface of the base. The porous friction generating layer comprises fibers and friction adjusting particles, and about 30 to about 95% of a total surface area of the fibers is in contact with the friction adjusting particles. A curable resin is dispersed throughout the porous friction generating layer and the base.

The invention relates to a brake shoe for a drum brake and a drum brake that includes a supporting unit and a lining unit, wherein the supporting unit comprises a bearing portion for pivotable support and an actuation portion, and wherein the supporting unit has a bending stiffness, which has different values between the bearing portion and the actuation portion.

A friction material, a corresponding disc brake pad, and a braking system having the pad, in which the so-called creep groan phenomenon is suppressed or significantly mitigated. The material may be a graphite-free friction material having from 20 to 30% by volume of one or more abrasives, from 10 to 20% by volume of coke, up to 10% by volume of one or more metal sulfides, up to 20% by volume of one or more metals and/or metal alloys and/or intermetallic compounds in powder form, up to 40% by volume of a fibrous material comprising aramid fiber and steel fiber, from 10 to 20% by volume of phenolic resin as a binder and up to 10% by volume of one or more fillers that may be: calcium hydroxide, friction powder, PTFE, and fluorite.

Using a friction material composition comprising: a fiber; a friction adjusting material; a binding material; and an uncrosslinked rubber being solid at normal temperature (25 C.), a friction material is obtained, wherein an ambient compressibility in a piston-pressing direction is 2% or less at normal temperature (25 C.) and at 4 MPa, and a tan value in a sliding direction at 20 C. to 50 C. is 0.05 or larger. Thereby, a friction material which has high damping properties and acceptable brake noise, which can prevent a decrease in responsiveness when brakes are applied, and prevent a decrease in the feeling of effectiveness associated therewith, and which can suppress a decrease in the fuel efficiency and an increase in abrasion caused by the dragging occurring when the friction material is brought into contact with a brake rotor; and a method for producing the friction material, can be provided.

The invention relates to a brake shoe for a drum brake and a drum brake that comprises a supporting unit and a lining unit, wherein the supporting unit comprises a bearing portion for pivotable support and an actuation portion, wherein the supporting unit comprises two supporting portions, wherein the center of the mean curvature of the first supporting portion is spaced apart from the center of the mean curvature of the second supporting portion.

A brake pad for a brake system, the brake pad comprising: a first brake pad surface having a coefficient of friction, the brake pad being for contact, in use, with a first radial portion of a component having a rotation axis, wherein: at a first point on the first brake pad surface the coefficient of friction has a first value; at a second point on the first brake pad surface the coefficient of friction has a second value greater than the first value; and at a third point on the first brake pad surface the coefficient of friction has a third value greater than the second value, wherein, in use, the first, second and third points are configured to be contactable with corresponding points on the first radial portion of the component at locations of increasing radial distance from the rotation axis so that the second point is further from the rotation axis than the first point, and the third point is further from the rotation axis than the second point.

A fluid cooled vehicle brake includes a fluid flow passage disposed in fluid communication with a brake shoe rim carrying a layer of friction material. A pair of spaced support webs are coupled to an inner surface of an annular inner surface of the rib. A water jacket is sealingly joined to the pair of webs and the inner surface of the rim to form a fluid flow passage between an inlet port formed in one of the support webs along the inner surface of the rim and out through an outlet port formed in one of the support webs. High thermal conductive members may be disposed within the layer of friction material to conduct heat to the rim. Heat radiator members are mounted within the coolant passageway.

A disc brake for a commercial vehicle is provided. The disc brake includes a brake caliper which engages over a brake disc and is in the form of a sliding caliper, two brake pads which are arranged in the caliper, are movable in opposite directions and each have a pad carrier plate and a friction lining fastened thereon and of which an application-side brake pad is pressable against the brake disc by an application device via at least one brake plunger, and with at least one restoring device with which the brake caliper is returnable after a braking-induced displacement and release of the brake. The restoring device is provided with a friction element which is mounted in the brake pad so as to be displaceable to a limited extent under pressure loading in the axial direction of the brake disc and on which an elastic pressure element held in the brake caliper and/or brake plunger acts.

The invention relates to a friction lining mixture for the production of a brake pad for drum brakes comprising at least 15% by weight of metal fibres, preferably steel fibres, in particular steel wool, at least 7% by weight of glass fibres, in the form of glass fibre bundles, at least 4% by weight resin and at least 2% by weight of friction particles, preferably with a Mohs hardness equal to or greater than 9, and a friction lining and drum brake lining produced therefrom, and a process for producing a drum brake lining

A disc brake for railway vehicles comprising a pad and a disk on which the pad acts is provided. The pad comprises a base plate and a plurality of friction elements fixed to the base plate. The friction elements comprise first friction elements made of a first material and second friction elements made of a second material. The second material has a compressibility modulus (e.g., the pressure needed to compress the material by 1 mm) that is at least 5 MPa less smaller than the compressibility modulus of the first material. There may be more of the first friction elements than the second friction elements.