Abstract: A silencer structure is mounted on a friction pad of a disc brake assembly by retaining pins which extend through the shim structure and into the backing plate for preventing dislodging of the shim structure in service. The force of the rotating action of the brake disc is at a 90° angle to the retaining pin. This 90° angle provides effective resistance to any shifting or rotation of the shim structure with respect to the backing plate during actuation of a disc brake apparatus. The retaining pin has an outer surface which is disposed substantially flush with the outer surface of the shim structure. The outer surface of the retaining pin therefore does not interfere with the positioning or functioning of an actuator piston structure, caliper structure or other disc brake structure. The flush mounting allows the system of the present invention to be used for any caliper design.

Abstract: A silencer shim structure is mounted on a friction pad of a disc brake assembly by retaining pins which extend through the shim structure and into the backing plate for preventing dislodging of the shim structure in service. The force of the rotating action of the brake disc is at a 90° angle to the retaining pin. This 90° angle provides effective resistance to any shifting or rotation of the shim structure with respect to the backing plate during actuation of a disc brake apparatus. The retaining pin has an outer surface which is disposed substantially flush with the outer surface of the shim structure. The outer surface of the retaining pin therefore does not interfere with the positioning or functioning of an actuator piston structure, caliper structure or other disc brake structure. The flush mounting allows the system of the present invention to be used for any caliper design.

Abstract: A silencer shim structure is mounted on a friction pad of a disc brake assembly by retaining pins which extend through the shim structure and into the backing plate for preventing dislodging of the shim structure in service. The force of the rotating action of the brake disc is at a 90° angle to the retaining pin. This 90° angle provides effective resistance to any shifting or rotation of the shim structure with respect to the backing plate during actuation of a disc brake apparatus. The retaining pin has an outer surface which is disposed substantially flush with the outer surface of the shim structure. The outer surface of the retaining pin therefore does not interfere with the positioning or functioning of an actuator piston structure, caliper structure or other disc brake structure. The flush mounting allows the system of the present invention to be used for any caliper design.

Abstract: A shim structure for sound dampening brake squeal noise in a disc brake apparatus, when installed on the piston and/or caliper engaging surface of a steel backing plate of the friction pad structure, is composed of a sheet of aluminum and a continuous membrane of a high temperature acrylic adhesive on one surface only of the sheet of aluminum. The sheet of aluminum has a thickness large enough to provide, in combination with the membrane of high temperature adhesive, effective sound dampening of the brake squeal noise. In a specific embodiment of the invention, the silhouette periphery of the shim structure is shaped to closely match the silhouettes of a number of related but differently configured friction pad structures.