Patent ID: 6142484
Filing Date: 2000-11-07
Classification: F16L,Y10S

Abstract:
A composite gasket for forming a seal between a pipe bell and a spigot comprising:a first, axially disposed portion formed of an elastomeric material and having a first leading edge and a first trailing edge,a second axially disposed portion, adjacent said first axially disposed portion, formed of a non-elastomeric substantially non-flexible plastic and comprising multiple, axially extending, circumferentially spaced apart, ramp-like projections separated by circumferentially spaced apart valleys,said second axially disposed portion having a second leading edge and a second trailing edge, said second leading edge of said second axially disposed portion being in contact with said first trailing edge of said first axially disposed portion,said first axially disposed elastomeric material being exposed in said circumferentially spaced apart valleys for access to fluid pressure.