Patent ID: 6277315
Filing Date: 2001-08-21
Classification: F16J,F16L

Abstract:
A method of manufacturing at least two different configurations of sealing rings adapted for sealing a space between an inner surface of a pipe socket provided with an annular groove and an outer surface of a spigot end introduced into the socket at a pipe joint, each said sealing ring comprising a first annular element and a second annular element that are bound to each other and with each element being of differing hardness, said method comprising:providing at least two said second annular elements and two substantially identical said first annular elements, said first elements each having at least two binding surfaces having respective first and second locations on said first element,attaching one said second element to one of said binding surfaces on one of said first annular elements, said one binding surface on said first element being at said first location so as to form a first sealing ring of a first configuration; andattaching another second annular element to a said binding surface at the second location on the other of said first annular elements so as to form a second sealing ring of a second configuration different than said first configuration, whereby said first sealing element may form different configurations of sealing rings dependent on the binding surface selected and the shapes of the second elements attached thereto.