Patent ID: 7325286

Claim:
A device for quick coupling of a pipe fitting to a flanged pipe, said device comprising: a coupling plate that is rigidly fastened to one end of the pipe fitting so as to be axially approachable to a front of a terminal flange of the flanged pipe; at least three locking wheels rotatable around their respective axes and projecting axially from said coupling plate in circumferentially spaced positions; remotely controllable means for controlling the rotation of said locking wheels around their respective axes; wherein each of the locking wheels has a cord truncated circular shape that allows passage of the terminal flange among said locking wheels for reciprocal approach to and movement away from the coupling plate when said locking wheels rotate to one angular position that cords of the locking wheels where the locking wheels are truncated face an axis of the pipe fitting; wherein all other angular positions of said locking wheels prevent passage of the terminal flange among said locking wheels; wherein each of said locking wheels has a helical shoulder member surrounding a shaft of the locking wheel, said helical shoulder member causing front abutment engagement and locking of said terminal flange against said flanged plate as a result of rotation of the locking wheels from said one angular position to said other angular positions; wherein said helical shoulder member of each of the locking wheels has a flat terminal portion at a distal end of the locking wheel, and said terminal portion is perpendicular to the axis of the pipe fitting when the locking wheel is rotated to said one angular position; wherein each of said locking wheels has an axis that is inclined with respect to an axis of the coupling plate; and wherein said remotely controllable means comprise a hydraulic cylinder that causes rotation of a toothed rim around the axis of said coupling plate, said toothed rim being in engagement with respective pinions splined to shafts of said locking wheels.