Abstract: A self adjusting parking brake system which automatically removes slack from a parking brake cable includes a fixed support and a hand-operated lever pivotably connected to the support for movement between brake-releasing and brake-engaging positions. A locking mechanism releasably maintains the lever in the brake-engaging position. The locking mechanism includes a main ratchet having a plurality of ratchet teeth and a main pawl having a pawl tooth engaging the plurality of ratchet teeth. A self-adjust mechanism connects the cable with the lever. The self-adjust mechanism includes an adjuster ratchet having a plurality of ratchet teeth and an adjuster pawl having a plurality pawl teeth. Only one of the plurality of pawl teeth fully engages the ratchet teeth at any one time. The adjuster pawl pivots about a pivot axis and has an approach angle of greater than forty-five degrees.

Abstract: A parking brake system of the self-adjust type for automatically removing slack from a parking brake cable includes a fixed support and a hand-operated lever pivotably connected to the support for movement between brake-releasing and brake-engaging positions. A locking mechanism releasably maintains the lever in the brake-engaging position. The locking mechanism includes a main ratchet fixed relative to the support and having a plurality of ratchet teeth and a main pawl pivotably connected with the lever and having a pawl tooth releasably engaging the plurality of ratchet teeth of the main ratchet. A self-adjust mechanism releasably connects the cable with the lever. The self-adjust mechanism includes an adjuster ratchet connected with the cable and having a plurality of ratchet teeth and an adjuster pawl pivotably connected with the lever and having one of three pawl teeth releasably engaging the ratchet teeth of the adjuster ratchet. The adjuster pawl is pivotable relative to the lever about a pivot axis.