| 摘要 |
To avoid strict control of flatness of a pressing portion, while keeping stability, in a sealing device comprising a metal ring and a seal portion, a metal ring (2) has an annular pressing portion (5) provided with a predetermined width in a diametrical direction for pressing an opponent member (11) when the metal ring (2) shifts in the axial direction, pressing surface (7) of the pressing portion (5) is formed in a circular arc or wavy sectional shape protruding toward the opponent member (11), the pressing portion (5) is constituted by an outward flange portion (6) integrally formed at an end of a tubular portion (4) of the metal ring (2), and the flange portion (6) has a smaller thickness than the tubular portion (4) and is formed in a circular arc or wavy sectional shape so as to have a spring characteristic.
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