Location History:
- Hoi-gun, JP (2003 - 2007)
- Kosai, JP (2011)
Company Filing History:
4 out of 800 
1 out of 1,641 Years Active: 2003-2011
Title: Shouichi Yoshikawa: Innovator in Electrical Machine Technology
Introduction
Shouichi Yoshikawa is a notable inventor based in Hoi-gun, Japan. He has made significant contributions to the field of electrical machines, particularly through his innovative patents. With a total of 4 patents, Yoshikawa has demonstrated a commitment to advancing technology in this area.
Latest Patents
Yoshikawa's latest patents include a carbon brush designed for rotating electrical machines. This invention features carbon brushes that contain graphite grains, metal particles, and solid lubricant, all sintered in a dispersed state. The graphite grains are formed from granulated raw graphite particles, with diameters ranging from 60 to 280 micrometers. Additionally, the surface of the granulated substance is coated with amorphous carbon made from organic binder carbides. Each carbon brush is designed with multiple holes, where the maximum dimension of these holes is less than half the average particle diameter of the raw graphite particles.
Another significant patent involves an insulator for an armature core with radially-formed salient poles. This insulator includes a winding aligning portion that has an approximately V shape, narrowing from the outer side to the inner side in the radial direction of the armature core. This design allows for the proper alignment of windings, preventing issues such as dig-ins and faulty insulation.
Career Highlights
Throughout his career, Yoshikawa has worked with prominent companies, including Asmo Co., Ltd. and Hitachi Chemical Company, Ltd. His experience in these organizations has contributed to his expertise in electrical machine technology.
Collaborations
Yoshikawa has collaborated with notable coworkers, including Yasushi Ueda and Takeo Noda. Their joint efforts have likely played a role in the development of his innovative patents.
Conclusion
Shouichi Yoshikawa is a distinguished inventor whose work in electrical machines has led to several important patents. His contributions continue to influence the industry and showcase the importance of innovation in technology.