Wataru Sumino

Title: Wataru Sumino: Innovator in Excavator Technology

Introduction

Wataru Sumino is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of hydraulic systems and excavator technology. With a total of 3 patents to his name, Sumino continues to push the boundaries of innovation in his industry.

Latest Patents

Sumino's latest patents include a hydraulic system, an excavator, and a control method for excavators. The control method of an excavator involves a first circuit of an open circuit that includes a main valve controlling the inflow of hydraulic oil from a main pump to a working equipment cylinder. Additionally, it features a tank where the oil flows out of the cylinder via the main valve. The second circuit is a closed circuit that includes a first valve between the swing pump and motor, and a second valve on a first passage between the main valve and the tank, which adjusts the back pressure of the main valve. The control method also includes mechanisms for oil flow management to optimize the excavator's performance.

The excavator patent describes a machine that includes a swing motor driven by oil from a swing pump coupled to a power take-off and driven by an engine. It features a first main oil passage connecting the swing pump and swing motor, along with a neutral retention valve controlling the passage of oil. Furthermore, it incorporates a regenerative energy absorbing device that captures energy generated by the swing motor, enhancing the efficiency of the excavator.

Career Highlights

Wataru Sumino is currently employed at Komatsu Corporation, a leading company in the construction and mining equipment industry. His work focuses on developing advanced hydraulic systems and excavator technologies that improve operational efficiency and performance.

Collaborations

Throughout his career, Sumino has collaborated with notable colleagues such as Shinobu Nagura and Masatoshi Ikeda. These partnerships have fostered innovation and contributed to the development of cutting-edge technologies in the field.

Conclusion

Wataru Sumino is a key figure in the advancement of excavator technology and hydraulic systems. His innovative patents and contributions to Komatsu Corporation highlight his commitment to enhancing the efficiency and effectiveness of construction equipment.