This inventor holds 2 USPTO granted patents. Top assignees: Chuo Hatsujo Kabushiki Kaisha, Honda Giken Kogyo Kabushiki Kaisha, Nippon Steel Corporation. Active years: 1999-2000.
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 102 
2 out of 10,092 
1 out of 3,721 Years Active: 1999-2000
Title: Masaaki Mikura: Innovator in Valve Spring Technology
Introduction
Masaaki Mikura is a notable inventor based in Nagoya, Japan. He has made significant contributions to the field of valve spring technology, holding 2 patents that showcase his innovative approach to manufacturing and material science.
Latest Patents
Mikura's latest patents include a manufacturing method of valve springs that are superior in durability. This method involves applying nitriding treatment to a coiled valve spring made of oil-tempered wire. The process supports the spring to rotate about its center axis during shot peening. In the first step, cut wires with a hardness of Hv 650 to 850 and a diameter of 1.0 to 0.6 mm are shot at the spring using a roller-type shot machine. The second step involves shooting cut wires of the same hardness but with a smaller diameter of 0.4 to 0.2 mm using a tumbling shot machine, with the second step taking longer than the first.
Another significant patent is for high strength spring steel, which provides a valve spring steel with a tensile strength ranging from 210 to 240 kgf/mm² after oil tempering. This invention allows for the production of high-strength valve springs at a lower cost by reducing the use of costly alloying components. The steel composition includes specific percentages of carbon, silicon, manganese, chromium, molybdenum, vanadium, niobium, and iron, and is subjected to precise heating and rolling processes.
Career Highlights
Masaaki Mikura has worked with prominent companies in the automotive industry, including Honda Giken Kogyo Kabushiki Kaisha and Chuo Hatsujo Kabushiki Kaisha. His experience in these organizations has contributed to his expertise in developing advanced materials and manufacturing techniques.
Collaborations
Mikura has collaborated with notable coworkers such as Taisuke Nishimura and Takashi Otowa. Their combined efforts have furthered innovations in the field of valve spring technology.
Conclusion
Masaaki Mikura's contributions to valve spring technology through his patents and career in the automotive industry highlight his role as an influential inventor. His innovative methods and materials continue to impact the field significantly.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile