Haruhiko Nakanosono

Title: Haruhiko Nakanosono: Innovator in Hydraulic Systems and Electric Motors

Introduction

Haruhiko Nakanosono is a prominent inventor based in Iwata, Japan. He has made significant contributions to the fields of hydraulic systems and electric motors, holding a total of 5 patents. His innovative designs have enhanced vehicle performance and efficiency.

Latest Patents

Nakanosono's latest patents include a hydraulic damping force control unit, a hydraulic shock absorber, a front fork for vehicles, and a hydraulic rotary damper. The hydraulic damping force control unit generates a damping force by keeping a damping force control valve closed when a piston of a hydraulic shock absorber starts to move from either the compression side dead center or the expansion side dead center. This design features a damping force control valve that includes a poppet valve for opening and closing a first fluid path, along with a pilot pressure chamber defined by a valve element of the damping force control valve. Additionally, a linear solenoid and a pilot valve are provided to increase and reduce the hydraulic pressure in the pilot pressure chamber. A check valve is also incorporated in parallel with the damping force control valve within the piston, along with a communication path connecting the first fluid path downstream of the damping force control valve to the pilot pressure chamber.

Another notable invention is the wheel hub electric motor and transmission drive unit. This design features two embodiments of electric motor and reduction gear transmissions for driving the hub of a vehicle wheel. The construction is compact, cost-effective, and operates quietly by utilizing two planetary transmissions incorporated within the hub and positioned between a pair of stub axle shafts fixed to the vehicle frame. The first planetary transmission is of the frictional type, while the second, which transmits higher torque, is of the spur gear type. An improved wiring arrangement is also disclosed for powering the electric motor.

Career Highlights

Nakanosono is currently employed at Yamaha Hatsudoki Kabushiki Kaisha, where he continues to innovate and develop new technologies. His work has significantly impacted the automotive industry, particularly in enhancing vehicle dynamics and efficiency.

Collaborations

Throughout his career, Nakanosono has collaborated with notable colleagues, including Toshihiro Yasui and Masanori Sugita. These collaborations have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

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