This inventor holds 1 USPTO granted patent. Top assignee: Sumitomo Electric Industries, Limited. Active years: 1986.
Company Filing History:
Years Active: 1986
Title: Innovations of Yoshio Dohi in Cemented Carbide Drill Bits
Introduction
Yoshio Dohi is a notable inventor based in Itami, Japan. He has made significant contributions to the field of drilling technology, particularly through his innovative designs in cemented carbide drill bits. His work focuses on enhancing the performance and durability of drill bits used in various industrial applications.
Latest Patents
Yoshio Dohi holds a patent for a cemented carbide drill bit. This drill is specifically designed to compensate for the brittleness of cemented carbide, thereby increasing its cross-break strength. The patent outlines that the ratio of the diameter of the web portion to the drill diameter is set between 25% and 35%. Additionally, the flute width ratio is maintained between 0.4:1 and 0.8:1. To reduce cutting resistance, the radial rake angle of the cutting lip is adjusted to a range of -5 degrees to positive values. Furthermore, the design promotes efficient chip ejection by decreasing the relative distance between the cutting lip and the opposing flute wall.
Career Highlights
Yoshio Dohi is associated with Sumitomo Electric Industries, Limited, where he applies his expertise in developing advanced drilling solutions. His innovative approach has led to improvements in the efficiency and effectiveness of drilling operations.
Collaborations
Yoshio has collaborated with notable colleagues such as Hideo Fukagawa and Yoshikatsu Mori. Their combined efforts contribute to the advancement of technology in the drilling industry.
Conclusion
Yoshio Dohi's contributions to the development of cemented carbide drill bits exemplify his commitment to innovation in drilling technology. His patented designs enhance the performance and reliability of drill bits, making a significant impact in the field.