Location History:
- Okazaki, JP (2012)
- Aichi-ken, JP (2014)
Company Filing History:
2 out of 2,064 
1 out of 264 
Years Active: 2012-2014
Title: Tomohiro Umemura: Innovator in Oil Pump Technology
Introduction
Tomohiro Umemura is a notable inventor based in Aichi-ken, Japan. He has made significant contributions to the field of hydraulic systems, particularly through his innovative designs for oil pumps. With a total of 2 patents to his name, Umemura's work showcases his expertise and creativity in engineering.
Latest Patents
One of Umemura's latest patents is an advanced oil pump design. This oil pump features an inner rotor with external teeth and an outer rotor that is eccentrically positioned, equipped with internal teeth that mesh with the inner rotor's external teeth. The design allows for efficient hydraulic oil management through a series of strokes: an intake stroke that suctions hydraulic oil, a discharge stroke that releases it, a confinement stroke that retains the oil, and a compression stroke that reduces the space to compress the oil. The innovative design includes a specific rotation angle of the inner rotor during the compression stroke, set between 21 to 27 degrees.
Another significant patent is the drain structure of a torque converter. This structure facilitates the circulation of oil from the oil pan to the torque converter and subsequently drains it into the transmission case. The drain oil passage is ingeniously designed to navigate through a gap between the torque converter and the oil pump, ensuring efficient oil management and discharge back to the oil pan.
Career Highlights
Throughout his career, Umemura has worked with prominent companies in the automotive and engineering sectors. He has been associated with Aisin Aw Co., Ltd. and Toyo Kogyo Co., Ltd., where he has contributed to various innovative projects and developments in hydraulic systems.
Collaborations
Umemura has collaborated with talented individuals in his field, including Nobukazu Ike and Masateru Nakagawa. These collaborations have likely enriched his work and led to further advancements in his inventions.
Conclusion
Tomohiro Umemura stands out as a significant figure in the realm of hydraulic technology, particularly with his innovative oil pump designs and drain structures. His contributions continue to influence the industry and showcase the importance of creativity in engineering.