Excavator Quick-Coupler Finger-Notch Safety Mechanism

The patent applies local quality by making the finger and notch dimensions specific to each machine-bucket combination. Each machine size has uniquely dimensioned fingers that correspond to specifically dimensioned notches on compatible buckets. This localized customization of dimensions ensures that only the correct machine-bucket pair can lock together, preventing universal compatibility from enabling excessive load attachment.

The patent employs asymmetry by creating non-uniform finger and notch dimensions across different machine sizes. The fingers of larger machines have different dimensions than those of smaller machines, and correspondingly, the notches on buckets are asymmetrically dimensioned to match only their designated machine size. This asymmetric design ensures that a finger from one machine size cannot engage with a notch from a different machine size, thereby preventing incompatible and potentially dangerous attachments.

The patent applies segmentation by dividing the attachment system into distinct components with specific dimensional characteristics - fingers on one part and notches on the other. Each component is independently dimensioned according to its designated machine size, allowing for modular manufacturing and assembly. This segmentation simplifies the overall system by creating discrete, interchangeable parts that maintain reliability through their specific dimensional relationships.

The patent utilizes parameter changes by varying the dimensional parameters of fingers and notches across different machine sizes. Rather than creating entirely different mechanisms for each size, the system maintains the same basic finger-notch locking mechanism but changes the specific dimensional parameters (length, width, depth) to ensure compatibility only between matched machine-bucket pairs. This approach maintains simplicity while achieving the safety objective.