Masahiko Hamada

Title: Masahiko Hamada and His Joining Technology

Introduction

Masahiko Hamada is an inventor associated with Toyota Jidosha Kabushiki Kaisha in Konan, Japan. His recorded patent work focuses on a joining jig and a method for coupling joining members.

Latest Patents

Hamada is credited with 1 patent: “Joining Jig and Joining Member Coupling Method Using the Joining Jig.” The invention describes a process in which bolt shafts are inserted through holes in a workpiece and sleeves are placed over the shafts’ distal ends. An upper die then presses the workpiece toward the shafts’ base ends while noses on the die tighten the sleeves. As tightening proceeds, each sleeve’s tightened portion moves into a relief portion above the nose’s tightening section. Because the noses do not apply direct axial thrust to the bolt shafts, the jig can exert sufficient tightening force without being limited by the shafts’ strength.

Career Highlights

Hamada’s listed patent reflects work on joining equipment and methods designed to improve the application of tightening force while reducing stress on bolt shafts. The available information identifies Toyota Jidosha Kabushiki Kaisha as his company.

Collaborations

Hamada’s listed coworkers include Tatsuhiko Yoshimura and Tomotsugu Sakai.

Conclusion

Masahiko Hamada’s recorded invention addresses a practical challenge in workpiece joining by tightening sleeves effectively while avoiding direct axial loading on the bolt shafts.