Brake movement and adjustment monitoring device

Details Brake movement and adjustment monitoring device Brake movement and adjustment monitoring device

1993-06-25

1994-10-25

Oberleitner, Robert J.

Brakes

With condition indicator

Electrical

340454, F16D 6600

Patent

active

053580753

ABSTRACT:
A vehicle brake wear warning system, comprising a displacement sensor, for determining the relative displacement necessary to fully actuate a brake. The displacement sensor has a piston, which operates in a shaft. The movement of the piston within the shaft is relative to the distance the brake's slack adjuster must move to fully actuate the brake. When the brakes are actuated, the location of the piston in the shaft of the displacement sensor becomes relevant in determining brake wear. The displacement sensor is sensitive to the position of the piston within the shaft. If the piston rests within a first range in the shaft, a small amount of brake wear is present, and a safe condition is indicated. If the piston rests within a second range in the shaft, a medium amount of brake wear is present, and the system will notify the driver that a brake adjustment is appropriate. If the piston rests within a third range in the shaft, a large amount of brake wear is present, and a dangerous condition is indicated to the driver. The logic of the system is such that a safe condition will be indicated if all brakes demonstrate a small amount of brake wear. But, if any brake demonstrates a medium or large amount of brake wear, an adjustment appropriate, or dangerous condition will be indicated, respectively.

REFERENCES:
patent: 3776329 (1973-12-01), Hope et al.
patent: 4649370 (1987-03-01), Thomason
patent: 4757300 (1988-07-01), Sebalos
patent: 4800991 (1989-01-01), Miller
patent: 4883150 (1989-11-01), Arai
patent: 5213056 (1993-05-01), Nicholls et al.
patent: 5226509 (1993-07-01), Smith

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