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A sealing device for sealing a joint which is constituted by two sealing surfaces facing each other. The sealing surfaces are displaceable in parallel in relation to each other. The sealing device comprises a sealing element consisting of elastomeric materials of at least two different hardnesses. The sealing element is compressed in the joint while contacting the sealing surfaces. The sealing element forms two portions of elastomeric material having low hardness, said portions contacting the sealing surfaces. The elastomeric material having high hardness is positioned between the portions having low hardness and contacting the sealing surfaces. The elastomeric material having low hardness and contacting the sealing surfaces. The elastomeric material having high hardness is adapted at parallel displacement of the sealing surfaces from the position for forming the joint to increase its size in a direction transversely in relation to the sealing surfaces.

Sealing device

A sealing device comprises two substantially conical or cylindrical sealing surfaces (,) which are axially introducable one into the other to a substantially concentric sealing position in which the sealing surfaces define between themselves an annular sealing space (,) and further comprising a sealing element (,) consisting of elastic material, the sealing element being compressed in the sealing space between the sealing surfaces and being at least in axial direction bound to a first sealing surface of said sealing surfaces. The second sealing surface (,) is formed with at least one projection (,) and the sealing element forms in cooperation with said first sealing surface at least one pair of portions (,) positioned adjacent each other in the axial direction and presenting different compression resistances under the influence of the projection of the second sealing surface. The projection (,) cooperates in the sealing position with the portion (,) of the sealing element having the smallest compression resistance, and the portion (,) of the sealing element having the greatest compression resistance is in the direction of introduction of the sealing surfaces one into the other positioned in front of the portion having the smallest compression resistance, so that the projection and the sealing element cooperate so as to provide a resistance against axial displacement of the sealing surfaces from the sealing position. (FIG.,)

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Falkenberg, Sweden

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