Joint for connecting a spigot to the bell of a pipe or coupling

An end portion of a member having a central longitudinal axis, the member at its very end defining a mouth, the end portion having an annular groove for receiving a gasket carrying an offset portion, the groove presenting a first end wall spaced from, and axially facing, the mouth and having a radial inward end and a radial outward end, a radially inwardly facing axially extending bottom wall extending substantially parallel to the longitudinal axis towards the mouth and extending from the radial outward end of the first end wall, the bottom wall terminating at a second wall axially facing the mouth and extending radially outwardly from the bottom wall, the second wall having a radial inward end and a radial outward end, the radial inward end of the second wall connected to the bottom wall, the radial outward end of the second wall terminating further from the longitudinal axis than the bottom wall, the second wall having a recess opening therethrough radially spaced from the radial inward end of the second wall, the recess extending generally in the same direction as the bottom wall towards the first end wall and the offset portion of the gasket carries a projection extending axially longitudinally away from the mouth and offset portion for extending into the recess in intimate contact therewith, a radially facing wall extending axially away from the bottom wall towards the mouth for part of its extension and then being bent over to extend towards the longitudinal axis;

• the gasket being annular, of resilient yieldable material and having a central longitudinal axis, axially spaced, opposing ends interconnected by an outer wall extending substantially parallel to the axis of the gasket engaging the bottom wall of the groove, an inner wall radially closer the longitudinal axis than the outer wall, an integral sealing lip extending from the inner wall of the gasket, one of the opposing ends of the gasket extending from the outer wall towards the longitudinal axis of the gasket engaging the first end wall of the groove, the other opposing end of the gasket extending away from the longitudinal axis of the gasket and comprising an offset portion on the radial side of the outer wall remote from the longitudinal axis, the offset portion being received between, and in intimate contact with the second wall and the radially facing axially extending wall bent over the offset portion to extend towards the longitudinal axis thereby locking the gasket body against movement axially in a direction away from the mouth permitting the sealing lip to be stretched.

An end portion of a member, the end portion including a gasket attached thereto, the end portion comprising a mouth, a central longitudinal axis, an axially facing first end wall remote from the mouth, a radially facing axially extending wall extending towards the mouth for part of its extension and being bent over to extend towards the longitudinal axis, an axially facing radially extending second wall closer to the mouth than the axially facing first end wall, said second wall having an inner radial end and an outer radial end, the outer radial end joined to the axially extending wall, a bottom wall extending longitudinally away from the mouth to the axially facing first end wall extending radially towards the central longitudinal axis, said gasket comprising a central longitudinal axis, axially spaced, opposing ends, an outer wall extending parallel to, and spaced radially from the longitudinal axis of the gasket and interconnecting the opposing ends, an inner wall closer the longitudinal axis of the gasket than the outer wall, a sealing lip, one of the opposing ends carrying an offset portion radially offset from the outer wall on the radial side of the outer wall remote from the longitudinal axis of the gasket, the offset portion being received between, and in intimate contact with, the second wall and the radially facing axially extending wall bent for part of its extension over the offset portion to extend towards the longitudinal axis thereby locking the gasket body against movement axially in a direction away from the mouth and permitting the sealing lip to be stretched.

An end portion of a member, the end portion carrying a gasket, the end portion comprising a mouth, a central longitudinal axis, an axially facing first end wall remote from the mouth, a radially facing axially extending wall extending towards the mouth for part of its extension and being bent over to extend towards the longitudinal axis, an axially facing radially extending second wall closer to the mouth than the axially facing first end wall, said second wall having an inner radial end and an outer radial end, the radially extending second wall has a recess opening therethrough radially spaced from the inner radial end, the recess extending generally in the same axial direction as the longitudinal axis, a bottom wall extending longitudinally away from the mouth to the axially facing first end wall extending radially towards the central longitudinal axis, each gasket comprising a central longitudinal axis, opposing ends, an outer wall extending parallel to, and spaced radially from the longitudinal axis of the gasket and interconnecting the opposing ends, an inner wall closer the longitudinal axis of the gasket than the outer wall, a sealing lip, one of the opposed ends carrying an offset portion radially offset from the outer wall on the radial side of the outer wall remote from the longitudinal axis of the gasket, the offset portion carries a projection which projection extends axially parallel to the outer wall and longitudinal axis and extends axially away from said mouth, the offset portion being received between and in intimate contact with the second wall and the radially facing axially extending wall bent for part of its extension over the offset portion, the projection being received in the recess in the second wall, thereby locking the gasket against movement axially in a direction away from the mouth.