An apparatus includes a retainer, a rotational portion that is connected to the retainer so that it is able to rotate with respect to the retainer on a rotation axis, a rotor that is connected to the rotational portion for rotation in unison with the rotational portion, and a caliper assembly that is connected to the retainer so that the caliper assembly is able to move according to a line of action. The apparatus also includes a damper assembly that is connected to the retainer and is connected to the caliper assembly to regulate movement of the caliper assembly with respect to the retainer along the line of action, wherein the caliper assembly and the damper assembly cooperate to define a mass damper system that damps vibration of the rotational portion.

Provided is a friction modifier capable of increasing, when used in a friction material, the coefficient of friction of the friction material in a high-load region. A friction modifier is made of a titanate, is a salt of at least one element selected from the group consisting of alkali metals and alkaline earth metals, and has a decomposition rate of not less than 30% by mass and not more than 100% by mass when heated at 800 C. for an hour in a nitrogen atmosphere.

To provide a low-cost friction material which is able to secure the required braking performance, the fading resistance, the wear resistance, and the adhesive strength between the friction material and the back plate while satisfying laws and regulations relating to the required amount of the content of the copper component contained therein. The friction material for the disc brake pad which is manufactured by forming a non-asbestos-organic (NAO) friction material composition that includes no copper component, in which the friction material composition includes no titanate but includes (a) 8-15 volume % of an inorganic friction modifier having the average particle diameter of 0.5-20 m and the Mohs hardness of 5-8 relative to a total amount of the friction material composition, (b) 1-3 volume % of a porous inorganic friction modifier having a micro porous structure relative to the total amount of the friction material composition, and (c) 5-10 volume % of a carbonaceous lubricant, where the carbonaceous lubricant includes 2-4 volume % of coke relative to the total amount of the friction material composition, the average particle diameter of the coke is 300-800 m while the content of the inorganic friction modifier (a), (b), and the carbonaceous lubricant (c) satisfies the following formula: 1.0((a)+(b))/(c)2.5.

A friction material as a lining for a drum brake includes polytetrafluoroethylene and an acrylic rubber-modified phenol resin. In the friction material, the polytetrafluoroethylene is preferably included in an amount of 0.1% by mass to 5% by mass, and the acrylic rubber-modified phenol resin is preferably included in an amount of 1% by mass to 15% by mass.

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 coating composition for a lubricating coating film includes: (A) a phenolic resin (B) an epoxy resin having an epoxy equivalent weight of 600 to 4000; and (C) at least one type of solid lubricant. The epoxy equivalent weight is generally defined by the number average molecular weight per the number of epoxy groups in a single molecule. The coating composition has a weight ratio of component (A) to the total weight of component (A) and component (B) of at least 50 weight %. A lubricating coating film, formed from the coating composition, has a high level of flexibility on surfaces of various base materials.

Friction material composition and associated brake pad for vehicles having a reduced or nil tendency to both stiction and creep groan, wherein the composition includes an organic binder; an inorganic filler; a lubricant; hard abrasives having a Mohs hardness of above 7 having exclusively a roundish shape, e.g. consisting in: Alumina, Corindone, Silicon carbide, Tungsten carbide, Zirconium carbide, Zirconium silicate, Boron nitride; soft abrasives having a Mohs hardness of below 7; carbon based materials; and a metal or mixture of metals except Cu, in an amount of less than 7% in volume calculated on the total volume of the composition; the ratio between the hard abrasive rounded and the carbon based materials being 1:3; the ratio between the hard abrasive rounded and the soft abrasives being 1:6; the ratio between the metal or mixture of metals and the carbon based materials being 1:6.

The invention relates to a friction lining for industrial brakes and drive elements, said lining including a dual-layer structure, a friction layer being connected to a backing layer. In such a friction lining which is particularly suited to industrial applications, the backing layer is inherently resilient and the friction layer and/or the backing layer is/are produced from a synthetic material-elastomer composite.

To provide a low-cost friction material which is able to secure the required braking performance, the fading resistance, the wear resistance, and the adhesive strength between the friction material and the back plate while satisfying laws and regulations relating to the required amount of the content of the copper component contained therein. The friction material for the disc brake pad which is manufactured by forming a non-asbestos-organic (NAO) friction material composition that includes no copper component, in which the friction material composition includes no titanate but includes (a) 8-15 volume % of an inorganic friction modifier having the average particle diameter of 0.5-20 m and the Mohs hardness of 5-8 relative to a total amount of the friction material composition, (b) 1-3 volume % of a porous inorganic friction modifier having a micro porous structure relative to the total amount of the friction material composition, and (c) 5-10 volume % of a carbonaceous lubricant, where the carbonaceous lubricant includes 2-4 volume % of coke relative to the total amount of the friction material composition, the average particle diameter of the coke is 300-800 m while the content of the inorganic friction modifier (a), (b), and the carbonaceous lubricant (c) satisfies the following formula: 1.0((a)+(b))/(c)2.5.

Disclosed herein is a composition comprising a crosslinked organic polymer; wherein the composition has a coefficient of friction that is in a range of 30% of a coefficient of friction for a composition comprising the same organic polymer that is not crosslinked; and wherein the composition has a lower K factor than a K factor of the composition comprising the same organic polymer that is not crosslinked; the coefficient of friction and the K factor being measured in a thrust washer apparatus as per ASTM D-3702, where the counter stationary surface in the thrust washer apparatus comprises carbon steel having a Rockwell C hardness of 18 to 22 and a 12 to 16 micro-inch surface finish.