Hiromasa Marumo is a notable inventor based in Nagano, Japan. He has made significant contributions to the field of bearing technology, holding a total of 6 patents. His innovative designs focus on enhancing the performance and durability of bearing devices.

Latest Patents

Marumo's latest patents include a "Bearing member and method for manufacturing the same" and a "Dynamic pressure bearing device." The bearing member consists of a cylindrical body made of copper metal, which rotatably supports a shaft member. An anti-rust film comprising cupric benzotriazole is formed on the surface of this cylindrical body. The dynamic pressure bearing device features a shaft member and a thrust plate with a press-fitting portion. This design includes at least two relief portions that help absorb press-fitting stress during assembly.

Career Highlights

Throughout his career, Marumo has worked with prominent companies such as Sankyo Seiki Mfg. Co., Ltd and Kabushiki Kaisha Sankyo Seiki Seisakusho. His work has significantly impacted the development of advanced bearing technologies.

Collaborations

Marumo has collaborated with talented individuals in his field, including Yasushi Mizusaki and Tokuhisa Tsutsui. Their combined expertise has contributed to the success of various projects and innovations.

Conclusion

Hiromasa Marumo's contributions to bearing technology exemplify his dedication to innovation and excellence. His patents and collaborations continue to influence the industry, showcasing the importance of advanced engineering solutions.

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