Company Filing History:
2 out of 13,411 
2 out of 1,022 
Years Active: 1991-1993
Title: Shigeto Umebayashi: Innovator in Automatic Transmission Technology
Introduction
Shigeto Umebayashi is a notable inventor based in Shizuoka, Japan. He has made significant contributions to the field of automatic transmission technology, holding 2 patents that showcase his innovative designs and engineering prowess.
Latest Patents
Umebayashi's latest patents include a "Supporting structure for control elements for automatic transmission." This invention features a multiple-disc clutch with a piston operated by hydraulic pressure from a control valve unit. It also includes a one-way clutch with outer and inner races, designed to mechanically jam based on the rotational direction of the outer race. The support member is comprised of the cylinder and the inner race, which are integrally formed, allowing for efficient operation within the transmission case.
Another significant patent is for "Automatic power transmission with mechanism for establishing under-drive." This invention integrates a clutch drum with a one-way clutch, fixed to a support on the transmission casing. It allows for a single bearing to support both the clutch drum and the one-way clutch, ensuring that radial force does not act on the spline engagement while transmitting engine output torque.
Career Highlights
Throughout his career, Shigeto Umebayashi has worked with prominent companies in the automotive industry, including Nissan Motor Company Limited and Jatco Corporation. His experience in these organizations has contributed to his expertise in automatic transmission systems.
Collaborations
Umebayashi has collaborated with notable colleagues such as Kazuyoshi Iwanaga and Noboru Hattori. Their combined efforts have further advanced the field of automatic transmission technology.
Conclusion
Shigeto Umebayashi's contributions to automatic transmission technology through his patents and collaborations highlight his role as an influential inventor in the automotive industry. His innovative designs continue to impact the efficiency and functionality of modern vehicles.