BigPatents India

The invention relates to a coupling for anchor bolts, comprising a sleeve (1) having an internal screw thread (5) and two anchor pipes (2) having an external screw thread (3), the ends (8) of said pipes being screwed into the sleeve (1). Said sleeve (1) is provided with an annular rib (4) in the longitudinal centre thereof, said rib having a cylindrical inner end surface (10). The ends (8) of the anchor pipes (2) engage in the annular rib (4) in a sealing manner, said ends being embodied with cylindrical thread-free circumferential surfaces (12) for this purpose. In order to improve the tightness of the coupling and to ensure that the transfer of impact energy from the first anchor pipe (2) to the second anchor pipe (2) does not engender much loss, the annular front surfaces (6) of the anchor pipes (2) are arranged against each other in a sealing manner in the region of the annular rib (4). In this way, a leak-free coupling for anchor bolts is provided, said coupling preventing the discharge of rinsing medium and/or setting mass. (FIG. 7)