Location History:
- Itami, JP (2013)
- Osaka, JP (2016)
Company Filing History:
2 out of 551 
1 out of 10,250 
1 out of 3,328 
Years Active: 2013-2016
Title: The Innovative Contributions of Hisao Oka: Patents and Career Insights
Introduction: Hisao Oka, an inventive mind based in Osaka, Japan, has made significant strides in the fields of cutting tool technology. With a total of two patents to his name, Oka's inventions showcase a unique approach to enhancing the efficiency and effectiveness of drilling and milling tools.
Latest Patents: Hisao Oka's latest patents reflect innovative advancements in cutting tool design. One prominent invention is a drill characterized by a small diameter portion at its front end, which possesses an outside diameter smaller than that of the drill itself. This design includes a cutting edge with two distinct portions: the rotation center side and the outer peripheral side. The point angles of these cutting edges minimize gradually from the rotation center to the outer edge, while a flat cutting edge with an inclination angle of 30° or less is strategically placed in a step portion between the small and large diameter sections.
Additionally, Oka has developed an end mill featuring both positive and negative helix angles. The first cutting edges spiral in a positive direction, while the second cutting edges spiral in a negative direction. Notably, these edges are arranged in a circumferential fashion and are designed to maintain continuity over the effective cutting edge length. In a remarkable twist, the phase angles of adjacent edges are deliberately varied to optimize performance.
Career Highlights: Hisao Oka has been associated with prominent companies such as Sumitomo Electric Hardmetal Corp. and Sumitomo Electric Industries, Limited. His roles in these organizations have likely contributed to the advancement of cutting tool technology, leveraging his innovative ideas and patentable inventions to spur growth in the industry.
Collaborations: Throughout his career, Oka has had the pleasure of collaborating with talented individuals such as Yoshiji Sato and Kiichi Meguro. These partnerships may have enriched his work and allowed for cross-pollination of innovative ideas within the field.
Conclusion: Hisao Oka's contributions to the cutting tool industry are evidenced by his patented inventions that exemplify ingenuity and practicality. With a career built on collaboration and innovation, Oka continues to influence the market, leaving a lasting impact on technology and engineering practices. His work serves as an inspiration for current and future inventors in the field.