Patent ID: 7036640

Claim:
In a trailer having an un-powered axle assembly supporting rear wheels thereof, the axle assembly including brake assemblies for the wheels, the improvement comprising a cooling system for brakes in the un-powered axle assembly, the cooling system including: a) an air-oil cooler assembly; b) at least one hydraulic pump, an output of the pump in communication with an inlet of the air-oil cooler assembly, at least a portion of the oil exiting an outlet of the air-oil cooler assembly adapted to cool the brakes of the un-powered axle assembly; c) a hydraulic fan assembly adapted to circulate air past the air-oil cooler assembly, a fan of the fan assembly being driven by oil exiting the outlet of the air-oil cooler assembly; d) a reservoir for receiving oil from the hydraulic fan and the brakes and for further recirculation to an inlet of the at least one hydraulic pump; e) a transmission linked to the un-powered axle assembly, mounted between the brake assemblies and being equipped with a plurality of gears; and f) a pump drive linked to the transmission, output of the transmission driving the at least one hydraulic pump.