Company Filing History:
6 out of 11 
1 out of 93 
1 out of 546 
Years Active: 1997-2005
Title: The Innovative Mind of Shiro Kawamoto
Introduction
Shiro Kawamoto, an inventive spirit based in Chandler, Arizona, has made his mark in the realm of engineering with a total of nine patents to his name. His work primarily focuses on creating portable power tools equipped with advanced engine technologies.
Latest Patents
Among Kawamoto's most recent innovations are two notable patents centered around four-stroke engines designed for operator-carried power tools. The first, titled "Multiple-position, operator-carried, four-stroke engine," presents a lightweight, portable power tool supported on a frame. This engine features a crankshaft housed within a crankshaft housing, complemented by a cylinder block. The design includes a crankcase ventilation passage that effectively connects the crankcase to an air/fuel induction passage. A unique oil mist generator is integrated, ensuring a mist of lubricating oil is distributed throughout the engine during operation, regardless of its tilt.
The second patent, "Multi-position, operator-carried, four-cycle engine," describes a power tool powered by a rotary implement driven by a four-cycle engine. This innovation includes a crankcase connected through a passageway to a valve chamber, designed to prevent the escape of lubricating oil while allowing for the circulation of lubricating oil mist throughout the engine.
Career Highlights
Shiro Kawamoto has contributed his expertise to renowned companies including MTD Southwest, Inc. and Ryobi North America, Inc. His work with these companies has played a significant role in the development of power tools that are both efficient and user-friendly.
Collaborations
During his career, Kawamoto has had the opportunity to collaborate with other talented individuals in the field, including Katsumi Kurihara and James M. Grayson. These partnerships have been instrumental in fostering an environment of innovation and creativity in the engineering sector.
Conclusion
Shiro Kawamoto stands out as a prolific inventor whose advancements in engine technology continue to enhance the functionality of portable power tools. His dedication to innovation, evidenced by his nine patents, showcases his commitment to pushing the boundaries of engineering and improving the tools that benefit everyday users.