Location History:
- Ushikumachi, JP (1978)
- Inashiki, JP (1978)
- Ibaraki, JP (1979 - 1980)
Company Filing History:
Years Active: 1978-1980
Title: Haruo Mishina: A Pioneer in Centrifugal Blower and Screw Fluid Machine Technologies
Introduction: Haruo Mishina, an accomplished inventor from Ushikumachi, Japan, has made significant contributions to the field of engineering with his innovative designs and technologies. With a total of four patents to his name, Mishina's work focuses primarily on advancing efficiency in centrifugal blowers and screw fluid machines, which are crucial in various industrial applications.
Latest Patents: Among Haruo Mishina's latest patents is the innovative design of an impeller for a centrifugal blower. This unique impeller features a backward type design with blades shaped as concave curves when viewed from the axial direction of the rotary shaft. The blade structure, having a larger inlet diameter on the shroud plate side compared to the hub plate side, optimizes the inlet blade angle to align with the relative flow angle, thus reducing flow separation and noise. This design not only enhances efficiency but also allows for higher pressure coefficients than conventional impellers.
Another notable patent is for a screw fluid machine, designed for use as a compressor. This apparatus includes a rotor casing, two side-casings, and a pair of screw rotors, along with various accessories. The rotor casing is ingeniously designed with an outer and inner wall, creating multiple partitioned spaces that facilitate efficient operation. The working chamber features an inlet and discharge port, while the meshing rotors ensure high performance in generating high-pressure gas for refrigeration and air conditioning systems.
Career Highlights: Haruo Mishina currently holds a prominent position at Hitachi, Ltd., where he continues to advance his research and development efforts. His inventive spirit and dedication have significantly contributed to the company’s technological advancements in the field of fluid machinery.
Collaborations: Throughout his career, Mishina has collaborated with several notable colleagues, including Kazuhiro Sunobe and Kunio Fujie. These collaborations have fostered an environment of innovation and knowledge sharing, propelling their collective contributions to the engineering landscape.
Conclusion: Haruo Mishina stands out as a prominent figure in engineering, particularly in the development of centrifugal blowers and screw fluid machines. His patents reflect a commitment to innovation and efficiency, making valuable contributions to both Hitachi, Ltd. and the broader industrial community. As technology continues to evolve, inventors like Mishina play a vital role in shaping the future of engineering solutions.