Location History:
- Osaka, JP (1984 - 1991)
- Nara, JP (1985 - 1995)
Company Filing History:
6 out of 772 
1 out of 8 Years Active: 1984-1995
Title: Hiroyoshi Yasui: Innovator in Hydrodynamic Technology
Introduction
Hiroyoshi Yasui is a prominent inventor based in Osaka, Japan. He has made significant contributions to the field of hydrodynamic technology, holding a total of 6 patents. His innovative designs have advanced the functionality and efficiency of various mechanical systems.
Latest Patents
One of Yasui's latest patents is a hydrodynamic bearing device. This device incorporates a relatively rotatable shaft and a sleeve that is internally sealed with the shaft. A groove for generating dynamic pressure is formed on either the external circumferential surface of the shaft or the internal circumferential surface of the sleeve. Additionally, a circumferential groove is formed at one end of the shaft, which is external to the bearing. An annular sealing plate is secured to the sleeve, interengaging with the shaft and the circumferential groove. A labyrinth is formed between the inner-diametric domain of the sealing plate, creating an oil-pooling space that enhances the device's performance.
Another notable patent is the bi-directional oil seal with leakage recovering rib formations. This oil seal comprises a seal body, a lip, and multiple ribs positioned on a bevel facing a space without oil. The ribs are angled concerning the rotational direction of the shaft, with rear ribs being longer than front ribs. This rib structure enables effective oil recovery, enhancing the overall efficiency of the sealing mechanism.
Career Highlights
Throughout his career, Hiroyoshi Yasui has worked with notable companies such as Koyo Seiko Company, Ltd. and Nippon Grease Co., Ltd. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects.
Collaborations
Yasui has collaborated with esteemed colleagues, including Teruo Yoshida and Teruo Ojima. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.
Conclusion
Hiroyoshi Yasui's contributions to hydrodynamic technology through his patents and collaborations highlight his role as a significant innovator in the field. His work continues to influence advancements in mechanical systems, showcasing the importance of innovation in engineering.