This inventor holds 4 USPTO granted patents. Top assignees: Hitachi Construction Machinery Co., Ltd., Hitachi Construction Machinery, Hitachi, Ltd.. Active years: 1976-1994.
Location History:
- Tokyo, JA (1976)
- Abiko, JP (1988 - 1994)
Company Filing History:
3 out of 1,508 
1 out of 53 
1 out of 42,726 
Years Active: 1976-1994
Title: Eiji Kometani: Innovator in Gas Sulphonitriding Technology
Introduction
Eiji Kometani is a notable inventor based in Abiko, Japan. He has made significant contributions to the field of materials engineering, particularly in the development of methods for gas sulphonitriding. With a total of 4 patents to his name, Kometani's work has advanced the understanding and application of sliding member technologies.
Latest Patents
Kometani's latest patents include innovative methods for gas sulphonitriding. One of his patents describes a process where a sliding member is sulphonitrided by heating it at temperatures between 480°C and 600°C in the presence of both 10-500 ppm of hydrogen sulfide gas and 20-70 vol% ammonia gas. An alternative method involves performing a primary heat treatment at 450°C to 540°C with 50-200 ppm of hydrogen sulfide gas and 10-70 vol% ammonia gas, followed by a secondary heat treatment after reducing the temperature to between 200°C and 350°C. These methods result in a sliding member with a FeS₂ layer on its surface, enhancing its performance and durability.
Career Highlights
Throughout his career, Kometani has worked with prominent companies such as Hitachi Construction Machinery Co., Ltd. and Hitachi, Ltd. His experience in these organizations has allowed him to apply his innovative ideas in practical settings, contributing to advancements in machinery and materials.
Collaborations
Kometani has collaborated with esteemed colleagues, including Yasuharu Gotoh and Ken Ichiryu. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies in their field.
Conclusion
Eiji Kometani's contributions to gas sulphonitriding technology exemplify his innovative spirit and dedication to advancing materials engineering. His patents and collaborations reflect a commitment to enhancing the performance of sliding members, making a lasting impact in the industry.