This inventor holds 3 USPTO granted patents. Top assignees: Nippon Ferrofluidics Corporation, Nippon Ferrofluidice Corporation. Active years: 1991-1994.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
2 out of 11 
1 out of 1 Years Active: 1991-1994
Title: Ryuhei Ishikawa: Innovator in Dynamic Pressure Bearings
Introduction
Ryuhei Ishikawa is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of dynamic pressure bearings, showcasing his expertise through multiple patents. With a total of 3 patents, Ishikawa continues to push the boundaries of innovation in his area of specialization.
Latest Patents
One of Ishikawa's latest patents is a dynamic pressure bearing assembly. This invention features a dynamic pressure bearing with a magnetic fluid sealed within, designed to be compact without compromising performance. The assembly includes a sleeve with an insertion hole fixed in a housing, along with a pair of pole pieces that create clearances between the sleeve and housing. A shaft is inserted and fixed to the pole pieces, allowing for the magnetic fluid to be sealed in the clearances, thus forming an efficient dynamic pressure bearing assembly. The materials used in this invention include nonmagnetic material for the sleeve and magnetic materials for the housing, shaft, and pole pieces, with a permanent magnet creating magnetic fields to seal the fluid.
Another significant patent by Ishikawa is a sealing member for ferrofluid seals and the method of producing the same. This innovation further demonstrates his commitment to enhancing the functionality and reliability of dynamic pressure bearings.
Career Highlights
Throughout his career, Ryuhei Ishikawa has worked with prominent companies, including Nippon Ferrofluidics Corporation and Nippon Ferrofluidice Corporation. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking advancements in his field.
Collaborations
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Conclusion
Ryuhei Ishikawa's work in dynamic pressure bearings exemplifies his innovative spirit and dedication to engineering excellence. His patents reflect a deep understanding of the complexities involved in bearing technology, making him a significant figure in the industry.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile