Kazuhisa Shimada

Title: Kazuhisa Shimada: Innovator in Hydraulic Power Transmission

Introduction

Kazuhisa Shimada is a notable inventor based in Shizuoka, Japan. He has made significant contributions to the field of hydraulic power transmission, holding a total of six patents. His innovative designs focus on improving torque transmission mechanisms in vehicles.

Latest Patents

One of his latest patents is a hydraulic power transmission joint that features a torque varying mechanism. This mechanism includes an accommodation hole with a relief hole at its bottom, which receives a check ball. The design allows for a linear increase in the flow passage area as the check ball displaces after the relief hole opens, maintaining a constant flow passage area thereafter. Additionally, a hysteresis characteristic is applied to the switching point between high and low torque transmission based on vehicle velocity. Another patent involves a joint that incorporates a valve to cut off torque transmitted from a front wheel driving shaft to a rear wheel driven shaft. This valve operates based on centrifugal force when a predetermined rotation speed is reached, ensuring that torque is adjusted according to vehicle velocity.

Career Highlights

Kazuhisa Shimada has dedicated his career to advancing hydraulic technology in automotive applications. His work has been instrumental in enhancing vehicle performance and efficiency through innovative torque management solutions.

Collaborations

He has collaborated with notable colleagues such as Tadahiko Kato and Toshiharu Takasaki, contributing to the development of advanced hydraulic systems.

Conclusion

Kazuhisa Shimada's contributions to hydraulic power transmission technology demonstrate his commitment to innovation in the automotive industry. His patents reflect a deep understanding of mechanical systems and a drive to improve vehicle performance.