Patent ID: 7837239

Claim:
A pipe coupling comprising: an annular clamp having an opening at least one end of its axial length for inserting therein a pipe, said annular clamp comprising two clamp members; an annular inclined surface extending axially from each of said clamp members; a plurality of wedge-shaped grippers arranged for sliding and abutting against said annular inclined surface, said wedge-shaped grippers being connected to one another by flexible elements to form a grip ring; and a fastener, comprising a shank, that fastens said clamp members towards each other in a direction along said shank transverse to the axial length so as to apply a radially-inward clamping force on the pipe inserted in said opening and a radially-inward clamping force on said annular inclined surface that moves and wedges said wedge-shaped grippers in an axial direction between said annular inclined surface and the pipe, and wherein each of said wedge-shaped grippers comprises protruding elements adapted to enter an outer skin of the pipe when said wedge-shaped grippers are wedged against the pipe.