Patent ID: 7484600

Claim:
A bicycle brake disk caliper apparatus comprising: a caliper housing dimensioned and structured to be mounted to a bicycle; a piston operatively coupled to the caliper housing so that the piston moves between a brake release position and a brake activating position; a hydraulic inlet for receiving a hydraulic fluid to move the piston; a piston activating space in fluid communication with the hydraulic inlet so that the hydraulic fluid moves the piston from the brake release position to the brake activating position; a cooling member; a cooling inlet in fluid communication with the hydraulic inlet; a heat transfer space in fluid communication with the cooling inlet for engaging hydraulic fluid received through the cooling inlet with the cooling member; and a cooling outlet in fluid communication with the heat transfer space for communicating hydraulic fluid from the heat transfer space to a location so that at least a portion of hydraulic fluid flows only one way from the hydraulic inlet, through the cooling inlet, and through the heat transfer space; wherein hydraulic pressure that pushes against the piston to move the piston also pushes hydraulic fluid through the cooling inlet; and wherein the cooling outlet introduces the hydraulic fluid communicated from the heat transfer space to a location both upstream of the piston activating space and upstream of the hydraulic inlet.