Patent ID: 6663112
Filing Date: 2003-12-16
Classification: F16J,F16L

Abstract:
A sealing device for sealing a pipe joint constituted by two cylindrical sealing surfaces (62, 66; 80, 84; 98, 102) facing each other and being displaceable in a first direction in parallel with each other to a pipe joint forming position, the sealing device comprising a sealing element (68; 86; 104) which is compressed between the two cylindrical sealing surfaces in the pipe joint forming position, the sealing element having two portions a first portion consisting of elastomeric material of low hardness for engaging the two cylindrical sealing surfaces in the pipe joint forming position, said first portion substantially fixed in a stationary position against the two cylindrical sealing surfaces during displacement in said first direction to said pipe joint forming position and a second portion (72; 90; 108), consisting of an elastomeric material of high hardness which is positioned within said first portion, the second portion having at least one first leg (76; 90; 112), which extends substantially transversely in relation to the two cylindrical sealing surfaces before the sealing element is compressed between the sealing surfaces during said diplacement thereof in said first direction to the pipe joint forming position and which is bent to a bent state relative to at least one second leg during said displacement of the sealing surfaces to the pipe joint forming position, said at least one first leg in said bent state obstructing parallel displacement of the sealing surfaces from the pipe joint forming position in a second direction opposite to said first direction by being raised from said bent state.