Pneumatic Tire Bead Reinforcement with Recess Cooling

The patent applies local quality by providing recesses at specific locations on the outer surface of the bead portion, specifically at the outermost ends of the bead reinforcing layers. These recesses create localized turbulent flow and cooling effects only where strain concentration and heat generation occur, rather than uniformly treating the entire bead portion. This targeted approach addresses the strain concentration problem at critical locations while maintaining the overall strength provided by the reinforcing layers.

The recesses act as intermediaries that facilitate heat dissipation from the bead reinforcing layers. By creating turbulent flow in the recesses, the patent introduces a cooling mechanism that mediates between the heat-generating reinforcing layers and the surrounding environment, preventing temperature buildup that contributes to damage at the outermost ends.

The patent segments the cooling function by providing multiple recesses at different locations on the outer surface of the bead portion, rather than using a single complex cooling system. Each recess is a simple structural feature that independently contributes to turbulent flow and cooling. This segmentation approach distributes the cooling function across multiple simple elements, avoiding the need for a single complex cooling mechanism.

The recesses are formed as integral parts of the tire structure during the vulcanization process, requiring no separate cooling system or additional components. The turbulent flow cooling is achieved passively through the geometric features of the recesses themselves, utilizing the natural flow of air or fluid around the rotating tire. This self-service approach eliminates the need for external cooling devices, maintaining structural simplicity.