Toshifumi Ikuno

Title: Toshifumi Ikuno: Tire Design Inventor

Introduction

Toshifumi Ikuno is an inventor based in Tokyo, Japan, associated with Bridgestone Corporation. His work includes tire designs intended to improve durability and performance under demanding conditions. Ikuno is credited with 2 patents.

Latest Patents

**Pneumatic radial tire.** This invention describes a tire bead structure with multiple bead cores and radial carcass plies wound around them. It positions at least half of the carcass-ply ends within a specified range of the tire’s section height. The arrangement is designed to increase rigidity between the bead and sidewall, limit deformation under load, reduce strain, and improve bead durability.

**Off-the-road heavy duty pneumatic radial tire.** This design is intended for use on irregular terrain. It combines a radially corded carcass with a multi-layer belt made from rubber-coated steel cords. The belt’s protective layer uses high-elongation cords, while the relative widths and edge positions of the layers are arranged to support the tire’s structure and durability.

Career Highlights

Ikuno’s listed inventions focus on radial tire construction, including bead reinforcement and belt-layer design. Both address structural demands that arise when tires carry heavy loads or operate on challenging surfaces.

Collaborations

Ikuno’s work is associated with Bridgestone Corporation. His listed coworkers include Akira Tamura and Masato Takenoya.

Conclusion

Toshifumi Ikuno’s two listed patents reflect a focus on tire structures designed to improve durability and withstand demanding operating conditions.