Kazuhiro Sameshima

Title: Kazuhiro Sameshima: Innovator in Piston Ring Technology

Introduction

Kazuhiro Sameshima is a notable inventor based in Saitama, Japan. He has made significant contributions to the field of piston ring technology, holding a total of 3 patents. His work focuses on enhancing engine efficiency and reducing oil consumption.

Latest Patents

One of Sameshima's latest patents is the combined oil ring. This innovative design aims to reduce engine oil consumption without compromising the oil sealing performance. The combined oil ring features a pair of upper and lower side rails that fit into the oil ring groove of a piston. These side rails are designed to maintain sliding contact with the cylinder while incorporating a spacer expander that presses the side rails outward. This design includes an anti-tilt device to ensure optimal performance.

Another significant patent is the piston ring, which is designed with a tapered outer peripheral surface. The radial cross-section can take the form of a rectangular ring, scraper ring, or Napier ring. The piston ring base is made from low-alloy steel or carbon steel, achieving a Vickers hardness of Hv 350 to Hv 550. This design enhances the durability and efficiency of the piston ring in various engine applications.

Career Highlights

Kazuhiro Sameshima is currently employed at Nippon Piston Ring Co., Ltd. His work at this company has allowed him to focus on developing advanced piston ring technologies that contribute to improved engine performance.

Collaborations

Sameshima has collaborated with notable coworkers, including Makoto Kajiwara and Katsuaki Ogawa. Their combined expertise has fostered innovation in the field of piston ring technology.

Conclusion

Kazuhiro Sameshima's contributions to piston ring technology have made a significant impact on engine efficiency and performance. His innovative designs continue to influence the automotive industry, showcasing the importance of advancements in this field.