Location History:
- Hitachi, JA (1976 - 1977)
- Hitachi, JP (1979 - 1991)
Company Filing History:
6 out of 42,485 
2 out of 195 
1 out of 2 Years Active: 1976-1991
Title: Hisao Inoue: Innovator in Hydraulic Machinery
Introduction
Hisao Inoue is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of hydraulic machinery, holding a total of 6 patents. His innovative designs focus on improving the efficiency and longevity of hydraulic systems.
Latest Patents
One of Hisao Inoue's latest patents is the "Variable Speed Pumping-Up System." This invention continuously monitors the operation of a variable speed electric driven pump turbine during pumping. It aims to detect the operation point of the pump turbine and prevent it from entering a hump characteristic region, which can lead to stalling due to partial reverse flow. When the operation point approaches this critical region, corrective actions are taken, including temporarily increasing the output level of the pump turbine to enhance its rotating speed.
Another significant patent is the "Lubricated Bearing Apparatus for Hydraulic Machinery." This apparatus features rotary-side ceramic sliding plates in contact with bearing-side ceramic sliding plates. The design includes preventing portions to protect the rotary-side ceramic plates from centrifugal force, allowing for the use of ceramic materials on both sides. This innovation extends the usable life of the bearing apparatus, enhancing the overall performance of hydraulic machinery.
Career Highlights
Hisao Inoue has worked with prominent companies such as Hitachi, Ltd. and Kansai Electric Power Co., Inc. His experience in these organizations has allowed him to develop and refine his innovative ideas in hydraulic technology.
Collaborations
Some of Hisao Inoue's notable coworkers include Ichiro Hitomi and Osamu Sugimoto. Their collaboration has contributed to the advancement of hydraulic machinery innovations.
Conclusion
Hisao Inoue's contributions to hydraulic machinery through his patents and career experiences highlight his role as a significant innovator in the field. His work continues to influence the efficiency and reliability of hydraulic systems.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.