This inventor holds 3 USPTO granted patents. Top assignees: Denso Corporation, Nippon Soken, Inc.. Active years: 2009.
Company Filing History:
3 out of 20,378 
3 out of 1,600 Years Active: 2009
Title: Seiji Yaokou: Innovator in Valve Timing Control Systems
Introduction
Seiji Yaokou is a notable inventor based in Anjo, Japan. He has made significant contributions to the field of valve timing control systems, holding a total of 3 patents. His innovative designs have advanced the technology used in hydraulic systems.
Latest Patents
Yaokou's latest patents include a sophisticated valve timing control system. This system features a first-side check valve that prevents hydraulic fluid from being discharged out of a retard chamber, while a second-side check valve serves a similar function for an advance chamber. Additionally, a first-side control valve operates by opening or closing a discharge passage based on pilot pressure received through a retard pilot passage. Another check valve is strategically placed in a supply passage between a phase switch valve and a branch point.
Another patent involves a phase control valve that integrates with a drain switch valve. This combination controls the opening and closing of both advance and retard drain control valves. The advance drain control valve is located in an advance check valve bypass passage, while the retard drain control valve is found in a similar bypass for the retard check valve. Both valves are driven by pilot hydraulic pressure to manage the flow effectively.
Career Highlights
Throughout his career, Seiji Yaokou has worked with prominent companies such as Nippon Soken, Inc. and Denso Corporation. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects.
Collaborations
Yaokou has collaborated with talented individuals in the industry, including Kinya Takahashi and Takao Nojiri. These partnerships have fostered a creative environment that has led to the development of advanced technologies.
Conclusion
Seiji Yaokou's work in valve timing control systems exemplifies his dedication to innovation and engineering excellence. His patents reflect a deep understanding of hydraulic systems and their applications. His contributions continue to influence the industry and inspire future inventors.