Multi-fuctional brake bleeder tool

Abstract

A brake bleeding tool having a positive locking device, one for each, of the standard and the recessed bleeder valves of vehicle braking systems. These tools have a nut driver configuration on the proximal end allowing the mechanic to open and close the valves in a hand tight manner. The tools other than the locking configurations operate exactly the same. A biased discriminator pin allows air to be expelled from the system by the mechanic pumping the brake pedal, however when the brake fluid reaches the discriminator pin it is detained allowing the brake pedal to reach a full top position. If the mechanic feels that there is still some air in the system, then by added pressure on the brake pedal to overcome the adjustably biased discriminator pin air and brake fluid will be discharged through the tool, a fitting and hose at the distal end directs the brake fluid into a container. By using one of these tools on each brake cylinder being bled, any number of cylinders can be bled at the same time. With all the bleeder valves open and master cylinder full, continuous pumping of the brake pedal will expel the air until the brake fluid reaches each discriminator valve. Since the discriminator valve will not pass brake fluid the pressure is directed to the other cylinders until all the air has been expelled. There should be a full pedal at this time, however if the mechanic feels that some air still exists in the system, closing hand tight all but one bleeder valve, pressing the brake pedal to the floor will expel the last air bubble from this cylinder. Repeating the operation for each of the other cylinders will complete the job.

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