Sealing system and gasket therefor
AssigneeBeele Engineering B.V.
InventorJohannes A. Beele
Life of this patent
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Abstract
The invention releases to a sealing system comprising a cylindrical tube of a material that is capable of deformation under the influence of a temperature increase, and a gasket of an at least partially elastic material for sealingly retaining the tube in a lead-through housing coaxial with the tube by forming a collar therearound, wherein said gasket is made of a fire-retardant material with a base of a cross-linkable material and an expandable material, in such an amount and of such a composition that a temperature increase above the plasticizing point of the tube will cause the gasket to expand to such an extent that the tube is compressed and a medium-tight seal of the lead-through housing and the tube is obtained.
Claims12
A system comprising a cylindrical tube having a passageway therethrough, the tube constructed of a material that is capable of deformation under the influence of a temperature increase, and a gasket forming a collar around the tube, said gasket being made of a fire-retardant material with a base of a cross-linkable material and an expandable material, whereby the said gasket is constructed and arranged to expand after the plasticizing point of the tube is reached and to such an extent that the tube is compressed substantially closing the passageway and a medium-tight seal of a lead-through housing and the tube is obtained, characterized in that said tube is made of a plastic or a composite material and in that the gasket has a base of a rubber material containing 2-25% by weight of graphite, wherein said gasket is in the form of a plug for being sealingly inserted into a circular space that is formed between a lead-through housing coaxial with the tube and the tube that extends therethrough.
A system comprising a cylindrical tube of a material that is capable of deformation under the influence of a temperature increase, and a gasket forming a collar around the tube, said gasket being made of a fire-retardant material with a base of a cross-linkable material and an expandable material, in such an amount of and of such a composition that a temperature increase above the plasticizing point of the tube will cause the gasket to expand to such an extent that the tube is compressed and a medium-tight seal of a lead-through housing and the tube is obtained, characterized in that said tube is made of a plastic or a composite material and in that the gasket has a base of a rubber material containing 2-25% by weight of graphite, wherein said gasket is in the form of a plug for being sealingly inserted into a circular space that is formed between a lead-through housing coaxial with the tube and the tube that extends therethrough, wherein said plug comprises circular outer ribs and circular inner ribs, which outer ribs have an outside diameter which is larger than the inside diameter of the outer passage, and wherein the inside diameter of the inner ribs is at least substantially the same as the outside diameter of the tube.
A system comprising a cylindrical tube of a material that is capable of deformation under the influence of a temperature increase, and a gasket forming a collar around the tube, said gasket being made of a fire-retardant material with a base of a cross-linkable material and an expandable material, in such an amount and of such a composition that a temperature increase above the plasticizing point of the tube will cause the gasket to expand to such an extent that the tube is compressed and a medium-tight seal of a lead-through housing and the tube is obtained, characterized in that said tube is made of a plastic or a composite material and in that the gasket has a base of a rubber material containing 2-25% by weight of graphite, wherein said gasket is in the form of a plug for being sealingly inserted into a circular space that is formed between a lead-through housing coaxial with the tube and the tube that extends therethrough, wherein said plug consists of at least two shell parts, an abutting boundary surfaces of the at least two shell parts extend at least substantially axially and the rear flanks in the direction of insertion, and an outer, serrated ribs extend radially, and inner ribs are arranged in pairs in the radial area of the outwardly extending peaks of the outer serrated ribs.
Dependencies are inferred from the claim text.