Patent ID: 8985591
Filing Date: 2015-03-24
Classification: F16J

Abstract:
1. A sealing apparatus for sealing an annular gap formed between two inner and outer members that coaxially rotate relative to each other, the sealing apparatus comprising: a backup ring provided in contact with a bottom surface of an annular groove for sealing, the annular groove for sealing being formed along a peripheral direction in one of the members and having a rectangular cross section; and a seal ring provided on an opening side of the annual groove for sealing, the seal ring being in sliding contact with the other member through an entire periphery by being pressed by the backup ring and rotationally slidable relative to the other member, a single continuous contact surface of the backup ring against the bottom surface being a surface having a cylindrical shape and a contact surface of the backup ring against the seal ring being a toric convex surface having a constant radius of curvature in an axial direction, a contact surface of the seal ring against the backup ring being a surface having a cylindrical shape and a contact surface of the seal ring against the other member being a toric convex surface having a constant radius of curvature in an axial direction.