Location History:
- Higashimatsuyama, JP (1988 - 2001)
- Saitama, JP (1986 - 2004)
Company Filing History:
4 out of 376 
4 out of 38 
1 out of 14 Years Active: 1986-2004
Title: Innovator Hirotetsu Sonoda: A Pioneer in Steering Dampers
Introduction: Hirotetsu Sonoda, an accomplished inventor based in Saitama, Japan, has made significant contributions to the field of engineering, particularly in the development of steering dampers. With an impressive portfolio of nine patents, Sonoda has proven to be a key figure in innovation, improving systems that enhance vehicle performance and safety.
Latest Patents: Hirotetsu Sonoda's latest patents reveal his deep expertise in steering damper technology. One of his notable inventions features a steering damper comprising two damper portions, each equipped with a variable throttle valve that restricts inflow from a power cylinder into a flow passage change-over valve. This innovative design includes a first check valve that allows inflow from the flow passage change-over valve into the power cylinder, connected in parallel to the variable throttle valve. Additionally, a second check valve is strategically positioned in communication with a tank, bridging the first check valve and the left and right chambers of the power cylinder.
Another recent patent introduced by Sonoda outlines a steering damper featuring a flow passage control valve. This valve facilitates the switching and connection among a pump, tank, and the left and right chambers of a power cylinder, corresponding to steering operations. It boasts left and right damper portions with variable throttle valves located in the middle of their respective cylinder passages, which limit inflow to the flow passage control valve from the power cylinder. This design also incorporates pilot operated check valves to optimize inflow from the flow passage control valve to the power cylinder, demonstrating Sonoda's ingenuity in enhancing driving dynamics.
Career Highlights: Sonoda has lent his expertise to several reputable organizations, including Jidosha Kiki Co., Ltd. and Bosch Braking Systems Co. Ltd. His work with these companies has helped advance automotive technologies, positioning him as a prominent inventor in the industry.
Collaborations: Throughout his career, Hirotetsu Sonoda has collaborated with talented individuals such as Tatsuya Fukushima and Yasuyoshi Emori. These partnerships have played a vital role in fostering innovation and have led to significant advancements in steering damper technology.
Conclusion: Hirotetsu Sonoda exemplifies the spirit of innovation through his dedication to improving vehicle safety and performance. With a total of nine patents to his name, including groundbreaking developments in steering damper technology, Sonoda continues to inspire future generations of inventors. His contributions not only benefit the automotive industry but also showcase the importance of collaboration among professionals in 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.