Location History:
- Toyota, JA (1977)
- Toyota, JP (1980 - 1992)
Company Filing History:
12 out of 36,499 
3 out of 1,838 
2 out of 57 
Years Active: 1977-1992
Title: Yorishige Maeda: Innovator in Internal Combustion Engine Technology
Introduction
Yorishige Maeda is a prominent inventor based in Toyota, Japan. He has made significant contributions to the field of internal combustion engines, holding a total of 15 patents. His innovative designs focus on improving engine efficiency and reducing oil consumption.
Latest Patents
One of Maeda's latest patents is for an internal combustion engine and its piston. This design features cylinders tilted at an angle of less than 90 degrees relative to a vertical axis. It includes an oil drain mechanism that effectively drains excess oil that collects when the engine stops. The oil drain hole is strategically located in the inner wall of the oil ring groove, ensuring that lubricating oil does not enter the combustion chamber when the engine is not in operation.
Another notable patent is for a composite oil-ring. This innovative design comprises an oil control ring, a seal ring, and a spring seal ring structured as a Belleville spring. The spring seal ring exerts pressure on both the seal ring and the oil control ring, preventing oil from escaping in both radially outward and axially upward directions. This advancement significantly reduces oil consumption, showcasing Maeda's commitment to enhancing engine performance.
Career Highlights
Yorishige Maeda has worked with notable companies such as Toyota Motor Corporation and Toyota Jidosha Kogyo Co., Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in automotive technology.
Collaborations
Throughout his career, Maeda has collaborated with talented individuals, including Hiroshi Kaede and Tadahiro Koike. These partnerships have contributed to the successful development of his patented technologies.
Conclusion
Yorishige Maeda is a distinguished inventor whose work in internal combustion engine technology has led to significant advancements in efficiency and performance. His innovative patents reflect his dedication to improving automotive engineering.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.