Abstract: A friction material composition of the present invention includes a fibrous base, a friction regulator, and a binder and has a copper content of 0.5 mass % or less in terms of copper element amount. The friction material composition contains regenerated cellulosic fibers as the fibrous base. In an embodiment of the friction material composition, the regenerated cellulose fiber has a fiber length of 2 mm to 20 mm.

Abstract: A disc brake device includes a pair of pads, a pad support member supporting at least one of the pair of pads in a movable manner in an axial direction, and a plurality of pistons configured to press the one of the pads toward the rotor in the axial direction. Slide engagement portions engaged with the pad support member so as to be movable in the axial direction are respectively provided at both side portions of the one of the pads in a circumferential direction. The one of the pads is fixed to a tip end portion of at least one piston including a piston arranged at an end portion on a rotation-in side or a rotation-out side among the plurality of pistons, and is not fixed to a tip end portion of a remaining piston.

Abstract: A disc brake pad spring being attached to a disc brake device in which pads located to sandwich a rotor are supported with a pad support member by inserting in an axial direction pins of the pad support member into a through hole formed in a radially inner side part of a peripheral-direction one-side part of a back plate of the pads, and elastically pressing pads against the pad support member. The disc brake pad spring is formed by a single metal plate, and includes first pressing parts pressing a peripheral-direction one-side part of an outer peripheral edge of the respective back plates of each of the pads toward a radially inner side, and second pressing parts pressing a peripheral-direction one-side surface of the respective back plates of each of pads toward the other peripheral side.

Abstract: A belt-like rib that extends in a peripheral direction is provided to the outer surface, in the axial direction, of an outer body. The inner diameter side sections of the bottoms of outer cylinders at the outer diameter side and the outer diameter side sections of the bottoms of outer cylinders at the inner diameter side, all the cylinders being provided to the outer body so as to be separated into two stages in the radial direction, are covered with the belt-like rib from outside in the axial direction so as to traverse along the peripheral direction. The outer diameter side sections of the bottoms of the outer cylinders at the outer diameter side and the inner diameter side sections of the bottoms of the outer cylinders at the inner diameter side are made to protrude from the belt-like rib in the radial direction.

Abstract: In a friction pad assembly for a disc brake, a plurality of lining assemblies supported on a guide plate are pressed to a disc rotor. The lining assembly includes a friction material and a back plate portion. A plate fitting portion of the lining assembly is inserted and equipped to a guide hole portion, and braking torque is transmitted from the plate fitting portion to the guide plate. A plurality of link plates applying pressing force from a torque receiving plate to the lining assembly are provided between the torque receiving plate and the back plate portion adhered to the guide plate. A damping layer sandwiched between inner surfaces of the torque receiving plate is provided on back surface sides of the link plates.

Abstract: A brake assembly comprising: (a) a caliper including: (i) one or more pistons, (b) one or more rotary to linear actuators that provides an axial force to move the one or more pistons, (c) a motor gear unit in communication with the one or more rotary to linear actuators, the motor gear unit including: (i) a motor; and (b) a motor brake that prevents movement of the motor gear unit, the pistons, or both when the motor is turned off so that a brake apply is maintained, the motor brake including: (i) housing; (ii) an engaging element; (iii) a sleeve, and (iv) a solenoid that is in communication with the sleeve so that when the solenoid moves the sleeve, the engaging element is moved into contact with the housing creating a braking force.

Abstract: A disc brake system that is an opposed piston brake system. The disc brake system includes a brake caliper having an inboard side and an outboard side. The inboard side of the brake caliper is configured to support more brake pistons than the outboard side of the brake caliper.

Abstract: 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.

Abstract: A pad pin receiver includes a body plate is attached to an inner side of a pin insertion portion provided in a back plate of a disc brake pad. The pin insertion portion engages with a pin inserted into the pin insertion portion during braking. The body plate covers a portion of an inner peripheral surface of the pin insertion portion. A bent plate is bent at at least one end portion of the body plate in a length direction of the body plate. When the body plate is attached to the pin insertion portion, the body plate extends in a thickness direction of the back plate, and the bent plate overlaps with the back plate in the thickness direction of the back plate.

Abstract: A testing machine comprising: (a) a transmitter; (b) a receiver opposing the transmitter; and (c) a compressibility sensor in communication with the transmitter, the receiver, or both, wherein the testing machine transmits a signal between the transmitter and the receiver to perform ultrasonic testing and further performs compressibility testing of one or more objects positioned between the transmitter and the receiver.

Abstract: A pad clip for a disc brake includes: a radial pressing portion which is disposed at inward than a clamping portion in a radial direction and presses outward in the radial direction an ear portion; a circumferential pressing portion which extends outward in the radial direction from a radially outer side portion of the clamping portion, an intermediate portion thereof being folded back inward in radial and circumferential directions of the rotor, and a tip end portion thereof pressing the pad inward in the circumferential direction; and a spring holding portion which protrudes outward in the circumferential direction from the radially outer side portion of the clamping portion than a base portion of the circumferential pressing portion, and holds a return spring which is made of wire material and presses the pad away from the rotor in an axial direction of the rotor.

Abstract: A wear debris collection device includes a rotation body that is connected to a rotation shaft and performs rotating movement in accordance with rotation of the rotation shaft, a braking member that brakes the rotating movement of the rotation body, a hood covering the rotation body and the braking member and to prevent dust from entering from outside, a blower that blows air into the hood, a collection apparatus that suctions air in the hood and collects wear debris of the braking member contained in the air, and an air pressure adjuster that measures air pressure in the hood and external air pressure and adjusts an air quantity of at least one of the blower and the collection apparatus so that the air pressure in the hood equals the external air pressure.

Abstract: A thermosetting resin composition for a friction material includes a thermosetting resin and a lignocellulose nanofiber dispersed in the thermosetting resin. A method for producing a thermosetting resin composition for a friction material includes a first step and a second step. In the first step, a plant-based biomass containing a lignocellulose is mixed with a dispersion medium to obtain a mixture thereof, and the mixture is subjected to a defibration treatment to obtain a slurry of a lignocellulose nanofiber. In the second step, phenol is reacted with an aldehyde in the presence of an acid catalyst to obtain a thermosetting resin, and the slurry is added to the thermosetting resin. The lignocellulose nanofiber is dispersed in the thermosetting resin while removing the dispersion medium and unreacted phenol.

Abstract: A retraction spring assembly having: a) pad clip having a lock channel and one or more assembly locks; b) a retraction spring affixed to the pad clip with two or more lock arms residing within the lock channel and a plurality of energy storage portions; and first and second retraction arms; wherein the one or more assembly locks are configured to receive the two or more lock arms and bias the retraction spring into an assembly position; during the brake apply, movement of the first and second retraction arm is toward each other and results in energy being stored in the body portion; and during the brake release, the energy stored in the body portion is released and transferred to both the first and second retraction arm to result in movement of the first retraction arm and the second retraction arm away from each other.

Abstract: A friction pad assembly for a disc brake is provided. A lining assembly includes a friction material which is pressed against a disc rotor during braking and a back plate which is fixed to a back surface of the friction material, and the back plate includes a plate fitting part swingably fitted to a guide hole provided in a guide plate. The plate fitting part is fitted into the guide hole such that a braking torque acting when the friction material is pressed against the disc rotor is transmitted from the plate fitting part to the guide plate. A rotation regulator regulating a rotation of the lining assembly is integrally formed on a torque receiving plate fixed to the guide plate.

Abstract: A method that includes monitoring a motor characteristic; and determining an actuator of a brake system has reached a retracted position after the motor characteristic has reached or exceeded a predetermined threshold.

Abstract: An opposed-piston type disc brake includes a guide cylinder extending axially inward from an opening edge portion of a cylinder in which an outer displacement member of a thrust generating mechanism is disposed is provided in an inner body of a caliper at an axial inner side portion of the inner body. A clamp base portion of a clamp member of a parking mechanism portion includes a housing hole opened to an axial outer side of the clamp base portion in which an inner side displacement member of the thrust generating member is disposed. A guide cylinder extending axially inward from an opening edge portion of the cylinder is fitted into the housing hole so as to relatively move in the axial direction, to form a first guide portion which supports the clamp member so that the clamp member is displaced relative to the cylinder in the axial direction.

Abstract: An assembly that includes a main housing. A motor is supported in a motor housing that is supported in the main housing. The motor has an output shaft and a locking mechanism. The motor is adapted to generate a first rotational direction torque and a second rotational direction torque. The motor is adapted to transfer the first rotational direction torque and the second rotational direction torque to a destination via the output shaft. The locking mechanism is adapted to prevent the output shaft from back driving in the second rotational direction after the first rotational direction torque has been transferred to the destination. The motor housing is adapted to rotate in the main housing to unlock the locking mechanism so that the second rotational direction torque can be transferred to the destination.

Abstract: A floating disc brake includes an outer pad disposed on an axially outer side relative to a rotor, an inner pad disposed on an axially inner side relative to the rotor, a fixing member disposed on the axially inner side relative to the rotor, the fixing member being configured to support the inner pad to be movable in an axial direction and being fixed to a vehicle body, and a yoke supported to the fixing member by a slide pin to be movable in the axial direction, the yoke supporting the outer pad. The fixing member is provided with an anchor disposed on a radially outer side relative to the rotor, the anchor being configured to bear a brake tangential force that acts on the outer pad at the time of braking within a circumferential range of a lining constituting the outer pad.

Abstract: A disc brake (11) includes: a floating caliper (13) including a base portion (25) slidably supported by an upper guide pin (31) supported by a support (23), a piston side pressing arm (39) and an opposite piston side pressing arm (41); a pair of brake pads (17); a drive piston (15) provided on the piston side pressing arm (39); a caliper return mechanism (22) for elastically biasing the base portion disposed on an end portion of the guide pin (31) to the side opposite to the drive piston side; and an inner circumferential side washer (44) disposed on both sides in an axial direction of the rubber ring (21) elastically supporting the upper guide pin (31) in a radial direction to restrict an inner circumferential portion of the rubber ring (21) from bending deformation along an axial direction of the upper guide pin (31).