Sealing device
AssigneeForsheda AB
InventorLennart Jornhagen
Life of this patent
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Abstract
A sealing device for sealing two concrete pipe end portions in relation to each other comprises a sealing surface (4) in a socket (2) of one of the pipe end portions and a sealing surface (14) on a spigot end (12) of the other pipe end portion. The spigot end is introduced into the socket and there is between the sealing surfaces formed a sealing space in which an elastic material sealing element (26) is positioned in a compressed state. A closure device (28) is positioned in the sealing space between the interior of the pipe end portions and the sealing element (26) for preventing a medium conveyed in the pipe end portions from contacting the sealing element as well as the sealing surfaces at least in a region of the sealing element.
Claims9
In combination, a first pipe, a second pipe, and a sealing device;
- said first pipe comprising an end portion including a socket and an interior, said socket including a sealing surface,
- said second pipe comprising an end portion including a spigot end and an interior, said spigot end including a sealing surface.
- wherein said spigot end sealing surface and said socket sealing surface define a sealing space therebetween when said spigot end is introduced into said socket, said sealing space connected with said end portion interiors and comprising a radially extending sealing space section and a cylindrical sealing space section.
- said sealing device positioned in said sealing space for sealing said first pipe end portion in relation to said second pipe end portion, said sealing device comprising a sealing element of elastic material compressed in said cylindrical sealing space section, said sealing device further comprising a compressible closure element positioned in said radially extending sealing space section for preventing a medium conveyed in said pipe end portion interiors from contacting said sealing element, said closure element being compressed in the radially extending sealing space, said closure element made of a rubber elastic material and comprising at least one sealed, gas-filled, annular cavity.
Dependencies are inferred from the claim text.