This inventor holds 1 USPTO granted patent and 6 published patent applications. Top assignee: Hitachi Automotive Systems, Ltd.. Active years: 2015.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 2015
Title: Hiroshi Yamagai and His Cylinder Apparatus Patent.
Introduction
Hiroshi Yamagai is an inventor associated with Yokohama, Japan, and Hitachi Automotive Systems, Ltd. His listed patent concerns a cylinder apparatus designed to improve the pressure resistance and sealing performance of its piston-rod assembly.
Latest Patents
Yamagai’s listed patent is “Cylinder apparatus.” It describes a piston and piston rod fitted within a fluid-filled outer tube. The piston-rod seal assembly includes a rod guide, seal case, oil seal, dust seal, and securing member, held in place by two staked portions. A rod seal and the oil seal’s seal lip provide two-stage sealing along the sliding piston rod, while an O-ring and a seal member seal the area between the seal case and outer tube. The patent describes how two-point staking and two-stage sealing can substantially increase the seal assembly’s pressure resistance. Yamagai is credited with 1 patent in the information provided.
Career Highlights
The available information associates Yamagai with Hitachi Automotive Systems, Ltd. His listed invention addresses sealing and structural retention in a hydraulic cylinder apparatus.
Collaborations
Kazunori Minoguchi and Tetsuo Yoshida are identified as Yamagai’s coworkers. The information provided does not specify their roles in the patent.
Conclusion
Hiroshi Yamagai’s listed patent focuses on improving a cylinder apparatus through reinforced retention and multiple sealing elements, reflecting an engineering approach to pressure resistance and fluid sealing.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile