Pipe joints or couplings – With indicator – alarm or inspection means
Patent
1985-05-29
1987-03-24
Callaghan, Thomas F.
Pipe joints or couplings
With indicator, alarm or inspection means
285373, 138 99, F16L 2106
Patent
active
046520236
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. At each end each coupler member has a ridge formed adjacent one of the aforementioned outer grooves to protect the coupler against liner blowouts longitudinally of the coupler and may also have ridges formed adjacent the inner grooves. The ridges are formed with knife edges which engage the pipe and are slightly compressed in the full assembled position of the coupler to provide support for the pipe. Further knife edges for engaging the pipe are provided in a diagonal arrangement in the central portion of the coupler. The holes in the coupler flanges contain restricted portions to retain the machine screws and the recesses in the flanges are shaped to retain the nuts.
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