Company Filing History:
5 out of 626 
1 out of 1,883 
1 out of 1,100 Years Active: 1999-2018
Title: Kazuharu Tajima: Innovator in Hydraulic Control Technology
Introduction
Kazuharu Tajima is a prominent inventor based in Hiroshima, Japan. He has made significant contributions to the field of hydraulic control devices, holding a total of 7 patents. His innovative designs have advanced the functionality and efficiency of construction machinery.
Latest Patents
Tajima's latest patents include a hydraulic control device and a construction machine equipped with the same technology. One of his notable inventions features a boom cylinder circuit that incorporates a boom control valve. This valve regulates the supply and discharge of hydraulic oil to and from the boom cylinder. Additionally, a merge switching valve is designed to switch between a supply position and a blocking position. The controller plays a crucial role by switching the merge switching valve to the blocking position when a combined operation of boom lowering and arm pushing is detected. Conversely, it switches to the supply position when only one operation is detected. Another patent focuses on a hydraulic control device that minimizes pump power loss during combined operations. The controller adjusts the capacity of the first pump based on the operation amount of the boom operation member, ensuring optimal performance.
Career Highlights
Kazuharu Tajima has worked with notable companies such as Kobelco Construction Machinery Co., Ltd. and Kobe Steel, Ltd. His experience in these organizations has allowed him to refine his expertise in hydraulic systems and construction machinery.
Collaborations
Throughout his career, Tajima has collaborated with talented individuals, including Koji Ueda and Fumikazu Higuchi. These partnerships have contributed to the development of innovative solutions in hydraulic technology.
Conclusion
Kazuharu Tajima's contributions to hydraulic control technology have significantly impacted the construction machinery industry. His inventive spirit and dedication to innovation continue to inspire future advancements in this field.