Abstract: A coupling device for the coupling of reinforcing bars, the coupling device comprising an elongate tubular body configured for receiving reinforcing bars, in particular their end portions, at least one recessed gripping surface being formed on an inner surface of the elongate tubular body, the recessed gripping surface comprising a plurality of teeth being configured to engage the reinforcing bars in response to the engagement of the reinforcing bars by a plurality of engaging bolts being adjustably positioned through the elongate tubular body.

Abstract: A coupling device for coupling reinforcing bars used in structural concrete comprising an elongate tubular body for receiving bar end portions, a plurality of engagers being adjustably positioned through the elongate tubular body, the coupling device being characterized in that the plurality of engagers are configured with a plurality of different end portions being configured for a different engaging of the reinforcing bars.