Company Filing History:
5 out of 1,838 
4 out of 36,499 
1 out of 3,077 
Years Active: 1979-1989
Title: Harunori Shiratori: Innovator in Power-Assisted Steering Systems
Introduction
Harunori Shiratori is a notable inventor based in Toyota, Japan. He has made significant contributions to the field of automotive engineering, particularly in the development of power-assisted steering systems. With a total of 9 patents to his name, Shiratori's work has had a lasting impact on vehicle performance and safety.
Latest Patents
One of his latest innovations is a power-assisted steering system that features a changeover valve unit. This system includes an input shaft that rotates based on the driver's steering effort and an output shaft connected to a hydraulic power cylinder. The valve assembly controls the fluid supply from a hydraulic pump to the power cylinder, responding to the relative rotation between the input and output shafts. Additionally, a hydraulic reaction mechanism applies a reaction force to the input shaft based on hydraulic pressure, enhancing the steering experience. Another significant patent is a control system for a hydraulic tandem pump in motor vehicles. This system includes a primary pump for the power-assisted steering device and a secondary pump for a hydraulic motor of an engine cooling fan. The control system utilizes an electrically operated flow quantity control valve and a temperature sensor to optimize fluid flow based on ambient temperature conditions.
Career Highlights
Shiratori has worked with Toyota Motor Corporation, where he has been instrumental in advancing automotive technologies. His experience at Toyota has allowed him to collaborate with other talented engineers and contribute to the company's reputation for innovation.
Collaborations
Throughout his career, Shiratori has worked alongside notable colleagues such as Kenichi Kikuchi and Hiroshi Kawakami. Their collaborative efforts have furthered the development of cutting-edge automotive technologies.
Conclusion
Harunori Shiratori's contributions to the automotive industry, particularly in power-assisted steering systems, demonstrate his innovative spirit and technical expertise. His patents continue to influence vehicle design and functionality, ensuring safer and more efficient driving experiences.
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.