Company Filing History:
2 out of 165 
1 out of 3 
1 out of 1,233 Years Active: 1999-2015
Title: Jun Tokumasu: Innovator in Friction Technology
Introduction
Jun Tokumasu is a notable inventor based in Hamamatsu, Japan. He has made significant contributions to the field of friction technology, holding a total of 3 patents. His work focuses on enhancing the performance and efficiency of friction components in various mechanical systems.
Latest Patents
One of Tokumasu's latest patents is a wet friction plate designed to reduce drag torque while maintaining the total area of frictional sheets. This innovative clutch friction plate features frictional sheets and oil grooves arranged on a flat annular metal core. The design includes small frictional sheets and oil grooves that are alternately positioned along the circumferential direction of the metal core. The frictional sheets are grouped in sets of five, with continuously changing arcuate contours that optimize performance.
Another significant patent involves a friction clutch device that incorporates clutch plates retained through meshing engagement on the inner peripheral surface of an outer case. This device is rotatably driven by an engine and includes a flat, annular pressing element that ensures effective frictional contact with the clutch friction plate. The design features engagement protrusions that mesh with the outer case, enhancing the overall functionality of the device.
Career Highlights
Throughout his career, Jun Tokumasu has worked with prominent companies such as Kabushiki Kaisha F.C.C. and FCC, LLC. His experience in these organizations has allowed him to develop and refine his innovative ideas in friction technology.
Collaborations
Tokumasu has collaborated with talented individuals in his field, including Kazuhiro Itonaga and Kenjiro Kawanabe. These partnerships have contributed to the advancement of his projects and the successful implementation of his inventions.
Conclusion
Jun Tokumasu's contributions to friction technology through his patents and collaborations highlight his role as an influential inventor. His innovative designs continue to impact the industry, showcasing the importance of advancements in mechanical systems.