Nobuyoshi Yasuhara

Title: Nobuyoshi Yasuhara: Inventor of Security and Steering-Lock Mechanisms.

Introduction

Nobuyoshi Yasuhara is an inventor based in Aichi, Japan. His work includes inventions related to cylinder locks and steering-lock apparatuses. Yasuhara is associated with Kabushiki Kaisha Tokai Rika Denki Seisakusho and holds 5 patents.

Latest Patents

**Cylinder lock.** This invention uses a lock piece inside a tumbler. The clearance between the lock piece’s lock-groove engaging portion and the side of the lock groove is smaller than the clearance between the tumbler’s lock-condition holding portion and the groove. When torque is applied as a key is inserted, the engaging portion contacts the groove while the holding portion remains separated from it. This arrangement helps prevent the holding portion from catching on the side of the groove.

**Steering-lock apparatus.** This design helps block a cam shaft’s rotation if a key cylinder comes away from the body. The movement of a regulating lever causes a block member to engage with a groove in an engagement body. A lock piece also enters between the block member and a cover, preventing the block member from moving in the disengagement direction. These features are intended to maintain the lock even if the regulating lever breaks or someone attempts to move the block member.

Career Highlights

Yasuhara’s listed inventions address mechanical security, including the operation of a cylinder lock and the resistance of a steering-lock mechanism to tampering or component failure. His work is associated with Kabushiki Kaisha Tokai Rika Denki Seisakusho.

Collaborations

Tomonori Kawachi and Yoshitaka Sato are identified as Yasuhara’s coworkers. The available information does not specify their roles in the listed inventions.

Conclusion

Nobuyoshi Yasuhara’s patent work focuses on practical locking mechanisms designed to improve security and maintain reliable operation.