Location History:
- Tokyo, JA (1977)
- Tokyo, JP (1979 - 1984)
Company Filing History:
9 out of 80 
1 out of 1 
8 out of 832,891 Years Active: 1977-1984
Title: Innovations of Hideharu Kaga
Introduction
Hideharu Kaga is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of hydraulic substances, holding a total of nine patents. His work focuses on improving the preparation and manufacturing processes of cement and related materials.
Latest Patents
One of Kaga's latest patents is a method of preparing kneaded compositions. In this process, about 30 to 76% of the total water is added to the cement to form a funicular state, capillary state, or slurry state. The resulting mixture is kneaded to reduce coagulated lumps of cement. After this initial kneading, the remaining water is added, and the mixture is kneaded again. This method allows for the incorporation of sand and/or gravel after the first kneading. The resulting cement paste, mortar, or green concrete exhibits a small percentage of bleeding water and high compression strength. Another significant patent is a method and apparatus for manufacturing articles of hydraulic substances. This involves vertically stacking a plurality of moulds, each with sealing members for hermetic sealing. While the pressure in the moulds is reduced, a hydraulic substance such as cement is poured in. The poured substance is then heat cured to produce solid articles that can be released from the moulds.
Career Highlights
Kaga has worked with Taisei Corporation, where he applied his innovative techniques in the construction industry. His expertise in hydraulic substances has made a considerable impact on the efficiency and quality of cement production.
Collaborations
Kaga has collaborated with notable coworkers such as Yasuro Ito and Yasuhiro Yamamoto. Their combined efforts have contributed to advancements in the field of hydraulic materials.
Conclusion
Hideharu Kaga's innovative patents and career achievements highlight his significant role in the development of hydraulic substances. His work continues to influence the construction industry and improve material performance.