Image Number 4 for United States Patent #6648104.
A brake caliper includes a cast metal housing having a bore extending perpendicularly to a disc located adjacent the housing, at least one piston slidably mounted in the bore, and a brake pad mounted on the piston. A coolant passage, formed through the housing in liquid isolation from the bore, coupled to a source of liquid coolant. The coolant passage is a single-pass passage having a coolant inlet and a coolant outlet. The coolant passage is configured to minimize turbulence of coolant flowing therethrough while still promoting effective heat transfer to the flowing coolant from the piston and brake fluid. Preferably, the housing is an aluminum housing formed from a single casting.