Patent ID: 6386333
Filing Date: 2002-05-14
Classification: F16D

Abstract:
Friction disc brake apparatus including a cooling system for vehicles in combination with left side and right side wheel discs which require braking, cooling being effected without the need of cooling fins or a radiator, the apparatus comprising:left and right side calipers respectively for said left and right side wheel discs, each caliper including outer and inner fluid tight chambers disposed on opposite sides of a respective wheel disc with the outer chamber for the left side caliper being on the outer side of said left side caliper and the outer chamber for the right side caliper being on the outer side of said right side caliper, a first chamber-connecting fluid line connecting the outer and inner chambers of said left side caliper, a second chamber-connecting fluid line connecting the outer and inner chambers of said right side caliper, a piston pump for pumping hydraulic fluid and having an inlet port and an outlet port, third fluid lines connecting said outlet port to each of said outer chambers, fourth fluid lines connecting each of said inner chambers to said inlet port of said pump, each of said calipers having a pair of friction pads respectively facing opposite sides of the respective wheel disc and, in said chambers, a pair of pistons for pushing the friction pads against said wheel discs, and braking means including a brake pedal and a master cylinder connected to each of said outer chambers via said third fluid lines for operating said pair of pistons in each of said chambers to brake said wheel discs when said brake pedal is actuated, said pump being operative to circulate said fluid repeatedly through said third fluid lines, said outer chambers, said first and second chamber-connecting fluid lines, said inner chambers and said fourth fluid lines back to said pump inlet port at a rate sufficient to prevent boiling of said brake fluid by sufficiently cooling said fluid without using said cooling fins or radiator for any of said fluid lines.