Company Filing History:
Years Active: 2002-2019
Title: Takumi Hayashi: Innovator in Rolling Bearings and Seat Reclining Devices
Introduction
Takumi Hayashi is a prominent inventor based in Mie, Japan. He has made significant contributions to the field of engineering, particularly in the design and development of rolling bearings and seat reclining devices. With a total of 5 patents to his name, Hayashi's work showcases his innovative spirit and technical expertise.
Latest Patents
Hayashi's latest patents include a cage for rolling bearings and a rolling bearing itself. The cage is designed to prevent seizure or breakage under high temperature and high-speed conditions, specifically when the dm·n value is not less than 80×10. This innovative rolling bearing consists of an inner ring, an outer ring, and multiple rolling elements retained by a cage formed through injection molding of a specialized resin composition. This composition includes polyamide resin derived from a dicarboxylic acid and a diamine component, along with a fiber reinforcing member. The dicarboxylic acid component primarily consists of terephthalic acid, while the diamine component features 1,10-diaminodecane. The fiber reinforcing member can contain either glass fibers or carbon fibers, enhancing the overall strength and durability of the bearing.
Another notable invention is the bearing bush for a seat reclining device. This component is strategically placed within the shaft hole of an external gear, allowing for smooth contact with wedge-shaped pieces. The seat reclining device incorporates a differential transmission mechanism that adjusts the angle between the seating surface and backrest of a seat. The mechanism includes an internal gear, an external gear, and a pair of wedge-shaped pieces that work together to facilitate the adjustment. The sliding surface of the bearing bush is made from a fluorocarbon resin composition, which includes thermoplastic resin, carbon fibers, and molybdenum disulfide, ensuring optimal performance.
Career Highlights
Hayashi is currently employed at NTN Corporation, where he continues to innovate and develop new technologies. His work has significantly impacted the engineering field, particularly in the areas of rolling bearings and seat mechanisms.
Collaborations
Throughout his career, Hayashi has collaborated with notable colleagues, including Satoru Fukuzawa and Kazuo Hirose. These partnerships have fostered a creative environment that encourages the exchange of ideas and advancements in technology.
Conclusion