Sealing system
AssigneeThe Secretary of State for Defence
InventorDuncan Godfrey Mervyn Thompson
Life of this patent
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Abstract
The present invention relates to a sealing system, its uses and method of use for forming a seal against a surface, and in particular for plugging and sealing an orifice such as a road or railway tunnel to prevent or minimise the dispersion of hazardous agent(s) in an emergency scenario. The system comprises a frame (200) which can be orientated against a surface (50) of an orifice, frame (10) comprising a perimeter outer surface (180) through which pliant elements (40) can extrude, via apertures (22), following the initiation of a means (30) for providing an overpressure.
Claims25
A system for forming a seal against a surface, the system comprising:
- a frame arranged to fit against the surface, the frame having a perimeter comprising a plurality of apertures uniformly spaced around the perimeter;
- at least one pliant element housed adjacent to the perimeter of the frame;
- and
- a means for providing an overpressure to the at least one pliant element, wherein, when initiated, the means for providing an overpressure is configured to force the at least one pliant element to extrude outwardly through the plurality of apertures of the perimeter and mould to the surface to form a seal against the surface.
Dependencies are inferred from the claim text.