This inventor holds 2 USPTO granted patents. Top assignee: Nidec Corporation. Active years: 2012.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 2012
Title: Hisaya Nakagawa: Innovator in Fluid Dynamic Bearings
Introduction
Hisaya Nakagawa is a prominent inventor based in Kyoto, Japan. He has made significant contributions to the field of fluid dynamic bearings, with a total of 2 patents to his name. His work has been instrumental in advancing technologies related to motors and recording disk drive apparatuses.
Latest Patents
Hisaya Nakagawa's latest patents include innovative designs for fluid dynamic bearings and associated devices. One of his patents focuses on a motor and recording disk drive apparatus where channels and gaps inside a bearing mechanism are filled with lubricating oil. This lubricating oil is retained in a first tapered seal portion arranged radially outward of a sleeve, and a second tapered seal portion is positioned between the shaft and an upper cap placed above the sleeve. The arrangement of groove-shaped recessed portions on the inner circumferential surface of the upper cap, along with raised portions on the lower surface of the top portion, contributes to increasing the channel cross-sectional area of a channel that connects the first and second tapered seal portions.
Another notable patent involves a fluid dynamic bearing device, spindle motor, and disk drive apparatus that includes a nickel-coated bearing housing. This device features a sleeve with a bearing hole into which a shaft is inserted, allowing for relative rotation about a center axis. The bearing housing, made of cold-rolled or galvanized steel, is filled with lubricating oil primarily composed of ester. A radial dynamic pressure bearing portion is provided between the outer circumferential surface of the shaft and the inner circumferential surface of the sleeve, which has radial dynamic pressure grooves for holding the lubricating oil and inducing fluid dynamic pressure during rotation.
Career Highlights
Hisaya Nakagawa is currently associated with Nidec Corporation, a leading company in the field of precision motors and related technologies. His work at Nidec has allowed him to focus on developing advanced bearing technologies that enhance the performance and reliability of various devices.
Collaborations
Throughout his career, Nakagawa has collaborated with notable colleagues, including Masato Gomyo and Yoichi Sekii. These collaborations have fostered innovation and contributed to the development of cutting-edge technologies in the industry.
Conclusion
Hisaya Nakagawa's contributions to fluid dynamic bearings and related technologies have made a significant impact in the field. His innovative patents and work at Nide
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile