Abstract: A repair coupler including two identical mating coupler members having a complementary relationship is disclosed. Each of the two complementary coupler members is formed to include a portion of semicircular cross-section and outwardly extending longitudinal flanges at each side of the semicircular portion. Each semicircular portion includes a plurality of spaced grooves for receiving spaced semicircular ribs of a liner. Each coupler member has a longitudinal recess adjacent each side of the semicircular portion for receiving a longitudinal section of the liner. The ribs of the liner engage a pipe and the longitudinal sections engage each other to form an effective seal. The coupler members are held together by fasteners extending through holes in the flanges. At each end each coupler member has a ridge formed adjacent one of the aforementioned grooves.

Abstract: A repair coupler including two identical mating coupler members having a complementary relationship is disclosed. Each of the two complementary coupler members is formed to include a portion of semicircular cross-section and outwardly extending longitudinal flanges at each side of the semicircular portion. Each semicircular portion includes a plurality of spaced grooves for receiving semicircular ribs of a liner. Each coupler member has a longitudinal recess adjacent each side of the semicircular portion for receiving a longitudinal section of the liner. A sealing liner includes a plurality of spaced ribs received in the grooves and longitudinally extending connecting sections received in the longitudinal recesses. The ribs engage a pipe and the longitudinal sections engage each other to form an effective seal. The coupler members are held together by simple fasteners, such as machine screws received in holes in the flanges and hex-headed nuts received in recesses in the flanges.

Abstract: Complementary elongated members of generally semi-cylindrical cross-section are provided. These members are assembled on pipes to be joined so as to enclose the joint between the pipes, and the members include abutting edges extending lengthwise of the pipes and arranged to be bonded together. The coupler is provided with one or more recesses extending across the abutting edges of the elongated members. Reinforcing elements are received in each of these recesses and extend across the abutting edges for reinforcing the coupler. The reinforcing members are bonded to the surfaces of the recesses and to the elongated members. In one form of the invention spaced lugs are provided on each of the elongated members and extend transversely of the line formed by the abutting edges. The reinforcing members are in a form of flat keys which are received between spaced lugs, extend transversely across the line of the abutting edges and are bonded to the lugs and to the elongated members.