Patent ID: 7222699

Claim:
A two-part color-coded brake condition visual indicator device for trucks, the device comprising: a visual indicator part comprising a flat tab having a multicolored visual indicator surface on a side of a distal end of the flat tab, the multicolored visual indicator surface having a least two different colors, and an indicator part circular opening in a proximal end of the flat tab for encircling an S cam shaft of a truck having a brake slack adjuster and an S cam shaft rotatably attached to the brake adjuster on each wheel of the truck; and a cover part comprising a mating flat tab having a distal end of the mating flat tab for covering at least a portion of the multi-colored visual indicator surface of the visual indicator part and a cover part circular opening in a proximal end of the flat tab for encircling the S cam shaft, the cover part overlying the visual indicator part to conceal at least a portion of the multicolored visual indicator surface of the visual indicator part; one of the two parts additionally attachable by a rigid attaching element to the slack adjuster and the other of the two parts additionally attachable by a rigid attaching means to the S cam shaft, so that as the slack adjuster and the S cam shaft go through relative movement in adjusting for the thickness reduction of a brake lining due to wear, the cover part and the visual indicator part move relative to each other to reveal at least a portion of the multicolored visual indicator surface showing a current wear level of the brake lining so that a first color indicates a safe thickness of the brake lining and a second color indicates a warning for an unsafe thickness of the brake lining.