Sealing device

The sealing device addresses material scatter and torque issues by incorporating an inward-protruding projection on the elastic body to contain the covering material, enhancing efficiency and reducing torque.

WO2026127003A1 Publication Date: 2026-06-18NOK CORP
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
NOK CORP
Filing Date
2025-12-09
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Existing sealing devices face issues with material scattering and excessive coverage of the covering portion beyond the intended area, leading to increased torque and inefficiency.

⚗Method used

A sealing device with an annular elastic body featuring a protrusion on its inner surface to prevent material scattering, combined with a covering portion of lower friction that contacts the rotating body, reducing torque and maintaining focused coverage.

🎯Benefits of technology

The protrusion effectively contains the covering material within the intended area, reducing torque and enhancing the sealing device's efficiency by preventing material scatter and maintaining contact pressure.

✦ Generated by Eureka AI based on patent content.

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Abstract

This sealing device seals an annular gap between an outer peripheral surface of a rotating body and an inner peripheral surface of a housing, the sealing device including: an annular elastic body; and a covering part which covers the inner peripheral surface of the elastic body, has a lower coefficient of friction than the coefficient of friction of the elastic body, and is in contact with the outer peripheral surface of the rotating body. On the inner peripheral surface of the elastic body, a protrusion for suppressing scattering of the material of the covering part during formation of the covering part is formed. The protrusion protrudes radially inward from the inner peripheral surface of the elastic body and extends along the circumferential direction of the inner peripheral surface.
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