This inventor holds 2 USPTO granted patents. Top assignees: Showa Corporation, Toho Rayon Co., Ltd., Other. Active years: 1997-2002.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
1 out of 438 
1 out of 29 
1 out of 834,570 Years Active: 1997-2002
Title: Innovations by Yoshiyuki Takezawa
Introduction
Yoshiyuki Takezawa is a notable inventor based in Gyoda, Japan. He has made significant contributions to the field of engineering, particularly in the development of advanced suspension springs for vehicles. With a total of two patents to his name, Takezawa's work exemplifies innovation and technical expertise.
Latest Patents
Takezawa's latest patents include a manufacturing method for suspension springs used in cars. This method involves creating a coiled spring with high fatigue strength, utilizing a rod with a tensile strength ranging from 1910 to 2020 N/mm and a diameter between 8 to 17 mm. The process includes a cold coiling step, followed by annealing to eliminate internal strains. A hot setting step is then performed, using surplus heat from the annealing process while applying a predetermined load to compress the coil. Finally, multi-stage shot peening is conducted on the coil to enhance its durability. Another significant patent is for a carbon fiber reinforced resin coil spring, where the carbon fibers are oriented at angles between ±30 to ±60 degrees relative to the spring's axis. The ratio of fibers oriented in compression to those in tension is carefully controlled to optimize performance.
Career Highlights
Throughout his career, Yoshiyuki Takezawa has worked with prominent companies such as Toho Rayon Co., Ltd. and Showa Corporation. His experience in these organizations has contributed to his expertise in materials and manufacturing processes.
Collaborations
Takezawa has collaborated with notable colleagues, including Takeshi Oguri and Masanobu Wakita. These partnerships have likely fostered innovation and the exchange of ideas in their respective fields.
Conclusion
Yoshiyuki Takezawa's contributions to the engineering sector, particularly in the development of advanced suspension springs, highlight his innovative spirit and technical prowess. His patents reflect a commitment to enhancing vehicle performance through cutting-edge manufacturing techniques.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile