FLIUD-TIGHT PIPE COUPLING WITH SLOTS IN SEALING SLEEVE THAT RECEIVE TEETH OF GRIPPING RING

摘要

PCT No. PCT/GB91/01232 Sec. 371 Date Jan. 26, 1993 Sec. 102(e) Date Jan. 26, 1993 PCT Filed Jul. 23, 1991 PCT Pub. No. WO92/02752 PCT Pub. Date Feb. 20, 1992.A pipe coupling for connecting together two plain-ended pipes in a fluid-tight manner comprises an outer tubular casing, an inner tubular casing and a tubular sealing sleeve. The sealing sleeve has two sets of inwardly projecting ribs which, in use, are pressed into sealing engagement with the respective ends of the pipes. The inner and outer casings are longitudinally split and tensioning screws on the outer casing can be tightened to tighten the outer casing around the inner casing and the sealing sleeve. Frustoconical slots in the outer surfaces of the sealing sleeves receive frustoconical gripping rings which have gripping teeth on the inner sides which bite into the pipe surfaces to secure the pipes against axial displacement.