Takumi Kondou

Title: Takumi Kondou: Seal Ring Innovations

Introduction

Takumi Kondou is an inventor based in Mie, Japan, whose patent work focuses on seal ring designs for rotary machinery. His inventions address the balance between limiting oil leakage and reducing frictional torque. Kondou has 2 patents and is associated with NTN Corporation.

Latest Patents

Kondou’s two listed patents concern improvements to seal rings mounted in annular grooves between a housing and a rotary shaft.

The first invention, “Seal ring,” aims to reduce oil leakage while keeping torque generation low, supporting improved fuel consumption. It features V-shaped recesses on the inner-diameter side of the ring’s side surface. These recesses avoid contact with the groove’s side wall on the non-sealed-fluid side.

The second “Seal ring” invention is designed to maintain low torque generation over an extended period. It uses an inclined outer portion of the ring’s side surface and a recess on the inner-diameter side that communicates with the ring’s inner circumferential surface. Together, these features support sealing while managing contact with the groove.

Career Highlights

Kondou’s listed patent contributions focus on practical mechanical sealing challenges, particularly leakage control, friction, and long-term performance. His work is associated with NTN Corporation, a company known for engineering products and technologies.

Collaborations

Kohzoh Kakehi is identified as Kondou’s coworker. The available information does not specify their roles in the listed inventions or describe particular joint projects.

Conclusion

Takumi Kondou’s two listed seal ring patents demonstrate a focused approach to improving sealing performance and reducing torque in rotary machinery.