Location History:
- Minamiawaji, JP (2013 - 2017)
- Osaka, JP (2013 - 2021)
Company Filing History:
2 out of 9 
2 out of 28,584 
1 out of 11 
Years Active: 2013-2021
Title: Masayuki Doi: Innovator in Chuck and Tool Holder Devices
Introduction
Masayuki Doi is a notable inventor based in Osaka, Japan. He has made significant contributions to the field of machining technology, particularly through his innovative designs in chuck devices and tool holders. With a total of five patents to his name, Doi's work has enhanced the efficiency and effectiveness of cutting tools in various applications.
Latest Patents
Doi's latest patents include a chuck device and a tool holder. The chuck device is designed to allow appropriate and easy setting of a discharging direction of working fluid. It is configured to be attached to a spindle of a machine tool for gripping a cutting tool. Inside the chuck device, there is a passage for the working fluid and a discharge opening at the leading end. The discharging direction of the working fluid is set opposite to the rotational direction of the cutting tool, with a tilt calculated by a mathematical formula.
The tool holder is another innovative device that uses a pressure medium suitable for gripping long and thin objects. This device eliminates the need for small-diameter machining for the device body and allows the use of materials suitable for sleeve deformation. The holder can deform radially to fasten a grasped object through the function of a pressure medium, featuring a device body, a sleeve for gripping, and a pressure chamber formed circumferentially in the sleeve.
Career Highlights
Throughout his career, Masayuki Doi has worked with prominent companies such as Big Daishowa Seiki Co., Ltd. and Ricoh Company, Ltd. His experience in these organizations has contributed to his expertise in developing innovative machining solutions.
Collaborations
Doi has collaborated with notable individuals in his field, including Tsuyoshi Komine. These collaborations have likely fostered an environment of creativity and innovation, leading to advancements in machining technology.
Conclusion
Masayuki Doi's contributions to the field of machining through his patents and career achievements highlight his role as an influential inventor. His innovative designs continue to impact the industry positively.