Foam Cushion Padding With Zoned Recesses for Variable Support

The patent applies local quality by creating zones with different foam densities within a single homogeneous foam structure. By varying the density of cells or incorporating recesses of different sizes and distributions in specific areas (seat vs backrest), the padding provides locally optimized support characteristics without requiring multiple foam types or complex spring systems. This resolves the contradiction by achieving varying resilience through spatial variation in foam structure rather than through complex multi-material construction.

The patent changes physical parameters of the foam material, specifically density and cell structure, to achieve different resilience levels. By controlling foam density gradients and cell size distributions in different regions, the padding adapts to provide appropriate support in seat areas versus backrest areas. This parameter-based approach simplifies production compared to using multiple foam types with different properties.

The patent segments the foam structure by creating closed recesses or cavities within the foam rather than drilling holes through it. These recesses are distributed throughout the foam volume and provide ventilation channels and softness without compromising the continuous outer skin of the foam. The segmentation occurs internally within the foam matrix, maintaining surface integrity while achieving the desired softness and ventilation effects.

The patent incorporates recesses and cavities into the foam structure during the foam manufacturing process itself, before the foam is installed or subjected to stress. This pre-formed structure provides the cushioning and ventilation effects without requiring post-production drilling that would weaken the foam. The recesses are created as integral parts of the foam matrix, preventing tear propagation that would occur with post-drilled holes.

The patent uses foam density as a variable parameter to achieve different levels of support and comfort. By creating gradients in foam density or using zones of different density values, the padding can accommodate users of different weights while maintaining structural support. The density parameter can be adjusted in different regions to provide appropriate firmness for support areas versus comfort areas, resolving the contradiction between hard support and user adaptability.

The patent creates a dynamic response in the foam structure through varying cell densities and recess distributions. The foam structure can deform and adapt to different load conditions, providing harder support when needed for structural integrity and softer response for user comfort. The dynamic behavior arises from the heterogeneous foam structure that allows different regions to compress at different rates and degrees under varying loads.