Symmetric Wiper Blade End Fitting with Universal Locking

The patent applies asymmetry within symmetry by designing fittings that are symmetric in overall shape and mounting orientation but asymmetric in their internal locking feature configuration. Each fitting has a unique asymmetric locking geometry tailored to its specific blade end position, while the external form remains symmetric. This resolves the contradiction by maintaining reliable locking engagement through asymmetric internal features while avoiding the need for completely different fitting designs for each end.

The patent creates a universal fitting design that can be used on both ends of the blade by incorporating symmetric external dimensions and mounting features. The fitting serves multiple functions: it provides structural support, enables locking engagement through its asymmetric internal features, and maintains aesthetic consistency. This multi-functionality approach reduces the number of different fitting types needed while ensuring proper locking engagement at each end.

The patent segments the locking feature design from the overall fitting structure. The asymmetric locking features are designed as separate functional elements within the symmetric fitting body, allowing them to be manufactured independently or as integrated features using standardized production processes. This segmentation enables the use of common production equipment for both fittings while maintaining the necessary asymmetric locking characteristics.

The patent implements asymmetry only where functionally necessary - in the internal locking feature geometry - while maintaining symmetric external dimensions and manufacturing interfaces. This selective asymmetry allows the majority of the fitting to be produced using standard symmetric manufacturing equipment, reducing the need for specialized production tools while ensuring reliable vertebra locking through the asymmetric internal features.

The patent designs a universal fitting that performs multiple functions and can be installed on either blade end. The symmetric external design and standardized mounting features allow the same fitting type to serve both ends of the blade, eliminating the need to maintain separate inventory for left and right fittings. The asymmetric internal locking features are configured to work with the corresponding asymmetric receptacles at each blade end, ensuring reliable locking engagement while reducing fitting type diversity.

The patent inverts the conventional approach by making the fitting symmetric and the blade end receptacles asymmetric, rather than making each fitting asymmetric to match each end. This inversion allows a single fitting design to be used on both ends, as the asymmetric locking engagement is achieved through the blade end receptacles rather than through different fitting geometries. This reduces inventory complexity while maintaining reliable locking engagement.