Patent ID: 6892752
Filing Date: 2005-05-17
Classification: F16L,Y10T

Abstract:
1. A pipeline isolating device adapted for installation into and occlusion of a pressurised liquid or fluid supply pipe comprising a substantially solid and deformable boot which is adapted to move between an expanded and an unexpanded state and a shaped plunger adapted to move into and out of said boot, wherein said boot has a hollow interior with a displacement contour adapted to receive and cooperate with said plunger so as to cause said boot to move between said expanded state when said plunger is inserted into said hollow interior of said boot and said unexpanded state when said plunger is withdrawn from the interior of said boot, wherein said boot is provided with at least one guide rod adapted to guide the axial movement of said plunger into and out of said boot and to minimize any deflection of said boot under said pressure.