This inventor holds 4 USPTO granted patents and 1 published patent application and 1 EPO patent. Top assignees: Hitachi Powdered Metals Co., Ltd., Honda Giken Kogyo Kabushiki Kaisha. Active years: 1993-2006.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Chiba, JP (1993)
- Matsudo, JP (2000)
- Nagareyama, JP (2003 - 2006)
Company Filing History:
4 out of 149 
1 out of 10,092 
Years Active: 1993-2006
Title: Innovations by Katsunao Chikahata
Introduction
Katsunao Chikahata is a notable inventor based in Nagareyama, Japan. He has made significant contributions to the field of internal combustion engine components, particularly through his innovative patents. With a total of 4 patents, Chikahata's work focuses on enhancing the durability and performance of valve guides.
Latest Patents
Chikahata's latest patents include a valve guide for internal combustion engines made from an iron base sintered alloy. This invention improves the durability of the valve stem without the need for a soft nitriding process. The valve guides consist of 8 to 20 mass % copper, 0.8 to 1.5 mass % carbon, and at least one of manganese sulfide, tungsten sulfide, or molybdenum sulfide in the range of 0.5 to 2 mass %, with the balance being iron. The unique structure of these valve guides features many pores and a metal structure where the copper phase is dispersed in an iron pearlite matrix, along with metal sulfides between the matrix and copper phase. Another significant patent involves a sintered alloy material for valve guides, which contains 1.5% to 4% by mass of carbon, 1% to 20% by mass of copper, 0.1% to 2% by mass of tin, and a small amount of phosphorus, all based on an iron matrix. The metallographic structure of this material showcases a matrix phase primarily composed of pearlite, with a free carbon phase dispersed throughout.
Career Highlights
Throughout his career, Chikahata has worked with prominent companies such as Hitachi Powdered Metals Co., Ltd. and Honda Giken Kogyo Kabushiki Kaisha. His experience in these organizations has allowed him to develop and refine his innovative ideas in the field of materials for valve guides.
Collaborations
Chikahata has collaborated with notable coworkers, including Koichiro Hayashi and Yutaka Ikenoue. Their combined expertise has contributed to the advancement of technology in internal combustion engine components.
Conclusion
Katsunao Chikahata's contributions to the field of valve guides demonstrate his commitment to innovation and improvement in engine performance. His patents reflect a deep understanding of materials science
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile