Kenji Yamada

Title: Kenji Yamada: Innovator in Hydraulic Drive Systems

Introduction

Kenji Yamada is a prominent inventor based in Toyama, Japan. He has made significant contributions to the field of hydraulic drive systems, particularly in construction machinery. With a total of 4 patents to his name, Yamada's innovations have enhanced the efficiency and functionality of hydraulic systems.

Latest Patents

Yamada's latest patents include a hydraulic drive system for construction machines designed to optimize the utilization of rated output torque. This system employs total torque control with high precision, utilizing a purely hydraulic structure. It achieves this by accurately detecting the absorption torque of another hydraulic pump and feeding this information back to one hydraulic pump. The delivery pressure of the main pump and load sensing drive pressure are supplied to a torque feedback circuit, which modifies the delivery pressure to simulate the absorption torque of the main pump. This innovative approach allows for better control of the main pump's displacement, thereby managing maximum torque effectively.

Another notable patent is a hydraulic driving system for construction machines that ensures continuous operation of actuators even when one reaches the stroke end. In this system, when the delivery pressure of the main pump increases to a certain set pressure, the signal pressure relief valve adjusts accordingly. This design prevents the other actuators from stopping, thereby maintaining operational efficiency.

Career Highlights

Kenji Yamada is currently employed at Hitachi Construction Machinery Tierra Co., Ltd. His work at this esteemed company has allowed him to develop and refine his innovative hydraulic systems. His expertise in hydraulic technology has positioned him as a key figure in the industry.

Collaborations

Yamada collaborates with talented coworkers such as Kiwamu Takahashi and Yasuharu Okazaki. Their combined efforts contribute to the advancement of hydraulic technology in construction machinery.

Conclusion

Kenji Yamada's contributions to hydraulic drive systems have significantly impacted the construction machinery industry. His innovative patents demonstrate his commitment to enhancing efficiency and functionality in hydraulic systems. Through his work at Hitachi Construction Machinery Tierra Co., Ltd., Yamada continues to push the boundaries of hydraulic technology.