Disc Brake Pad Guide Geometry to Prevent Reversed Pad Installation

The patent applies asymmetry by providing different structures at the disc entry side and disc exit side of the friction pads. Specifically, one side has a tab with a protrusion while the other side has a tab with a recess, and the pad guide grooves are correspondingly configured with different shapes. This asymmetric design ensures that the friction pad can only be installed in the correct orientation, as inserting it incorrectly would cause the protrusion or recess to collide with the caliper body or fail to engage properly with the pad guide grooves.

The patent integrates the incorrect installation prevention function directly into the existing tab and pad guide groove structures through asymmetric design, rather than adding separate preventing parts. The protrusion and recess features are incorporated into the tab geometry itself, and the pad guide grooves are shaped to correspondingly guide and constrain the tabs. This approach maintains structural simplicity while effectively preventing incorrect installation.