Abstract: A pipe coupling for joining together the ends of two adjacent pipes includes a housing for receiving the ends of the two adjacent pipes, and a locking arrangement which includes an annular chamber, and a plurality of grippers radially moveable towards the central axis of the housing from an inoperative condition to an operative condition. Each gripper includes a gripping formation for operatively gripping a pipe inserted into a bore of the housing, and a locking formation for operatively engaging a corresponding locking formation on the housing so as to axially lock the gripper to the housing. Each locking arrangement also includes a locking ring for locking the grippers to the housing so that axial displacement of the locking ring under fluid pressure within the annular chamber causes radial displacement of the grippers into the operative condition.

Abstract: A pipe coupling (10) for joining together the ends of two adjacent pipes includes a housing (12) which defines a generally central bore (13) along a central axis of the housing for receiving the ends of the two adjacent pipes, and a locking arrangement (14) at each end of the housing (12) for locking the pipes to the coupling. Each locking arrangement (14) includes an annular chamber (23) within the housing, an inlet for allowing fluid into the chamber, an outlet for allowing fluid out of the chamber, and an annular seal (24) which is arranged to move within the annular chamber axially of the housing. A locking ring (26) is provided between the annular seal (24) and a plurality of radially movable grippers (30) for locking the grippers to a pipe end within the housing.

Abstract: A pipe coupling (10) for joining together the ends of two adjacent pipes includes a housing (12) which defines a generally central bore (13) along a central axis of the housing for receiving the ends of the two adjacent pipes, and a locking arrangement (14) at each end of the housing (12) for locking the pipes to the coupling. Each locking arrangement (14) includes an annular chamber (23) within the housing, an inlet for allowing fluid into the chamber, an outlet for allowing fluid out of the chamber, and an annular seal (24) which is arranged to move within the annular chamber axially of the housing. A locking ring (26) is provided between the annular seal (24) and a plurality of radially movable grippers (30) for locking the grippers to a pipe end within the housing.