A drum brake apparatus may include: a housing; a main braking part installed at one side of the housing, and driven by hydraulic pressure to pressurize shoes during main braking; and a parking braking part installed at the other side of the housing, and driven by an electromotive force to pressurize the shoes during parking braking.

A drum brake apparatus may include: a housing; a main braking part installed at one side of the housing, and driven by hydraulic pressure to pressurize shoes during main braking; and a parking braking part installed at the other side of the housing, and driven by an electromotive force to pressurize the shoes during parking braking.

A braking apparatus may include: a torque plate unit; a piston unit coupled to a shoe liner and configured to be movable inside the torque plate unit; and a dust boot including a boot body enclosing the piston unit and installed between the torque plate unit and the piston unit, and a shape retainer having an annular shape and inserted into one end of the boot body.

A braking apparatus may include: a torque plate unit; a piston unit coupled to a shoe liner and configured to be movable inside the torque plate unit; and a dust boot including a boot body enclosing the piston unit and installed between the torque plate unit and the piston unit, and a shape retainer having an annular shape and inserted into one end of the boot body.

A sphere drive line retarder is presented that is mounted to a drive shaft from an engine. The sphere drive line retarder comprises a sphere rotor mounted to the drive shaft and housed within a retarder housing. The sphere drive line retarded has a piston assembly comprising at least one piston, a brake shoe mounted to each piston, and hemispherical friction material mounted to the brake shoe. The hemispherical friction material is located between the sphere rotor and the brake shoe. Each piston is housed within a piston housing that is hydraulically isolated from the retarder housing. The retarder housing contains hydraulic fluid to cool the sphere rotor.

A sphere drive line retarder is presented that is mounted to a drive shaft from an engine. The sphere drive line retarder comprises a sphere rotor mounted to the drive shaft and housed within a retarder housing. The sphere drive line retarded has a piston assembly comprising at least one piston, a brake shoe mounted to each piston, and hemispherical friction material mounted to the brake shoe. The hemispherical friction material is located between the sphere rotor and the brake shoe. Each piston is housed within a piston housing that is hydraulically isolated from the retarder housing. The retarder housing contains hydraulic fluid to cool the sphere rotor.

A drum brake apparatus for a vehicle may include: a cylinder device configured to apply a braking force to a shoe; a clip part extended from the cylinder device toward the shoe, and elastically contacting the shoe; a cylinder coupling part coupling the clip part to the cylinder device; and a shoe assembling part fastening the clip part to the shoe.

Actuation mechanism for a wedge-actuated drum brake, in particular for commercial vehicles, includes a spreading unit which has an actuating element which is displaceable along an actuating direction, wherein the spreading unit is configured in such a way that the displacement of the actuating element can occur directly via a fluid or a fluid pressure.

Actuation mechanism for a wedge-actuated drum brake, in particular for commercial vehicles, includes a spreading unit which has an actuating element which is displaceable along an actuating direction, wherein the spreading unit is configured in such a way that the displacement of the actuating element can occur directly via a fluid or a fluid pressure.

A shield assembly is employed for a friction brake used to decelerate a road wheel of a vehicle. The vehicle has a body with a first body end configured to face an incident ambient airflow, a second body end opposite of the first body end, and an underbody section spanning a distance between the first and second ends. The shield assembly includes a first shield component arranged proximate the brake and rotationally fixed relative to the vehicle body. The shield assembly also includes a second shield component operatively connected to the first shield component for shifting relative thereto. The shield assembly additionally includes an actuator employing a shape memory alloy element to shift the second shield component relative to the first shield component in response to a temperature of the brake to thereby direct at least a portion of the airflow to the brake and control temperature thereof.