초록 ▼

A restraining ring and gland for a mechanical joint with a plain plastic pipe end including two semi-circular members securable together by lateral end flanges and having a cylindrical tapered bore having a roughened surface and provided with longitudinally spaced internal annular blunt edged ribs f

A restraining ring and gland for a mechanical joint with a plain plastic pipe end including two semi-circular members securable together by lateral end flanges and having a cylindrical tapered bore having a roughened surface and provided with longitudinally spaced internal annular blunt edged ribs for gripping the plastic pipe without cutting the pipe surface. When the PVC pipe is coupled to iron pipe, one gland is used. When the PVC pipe is connected to a PVC bell or fitting, two glands are used secured together by longitudinal bolts.

대표청구항 ▼

A restraining ring and gland for a mechanical pipe joint for couplng with a plain plastic pipe end, said restraining ring and gland comprising: semi-circular ring members each having opposite end flanges adapted to be fastened together for securing said ring members together around said plastic pipe

A restraining ring and gland for a mechanical pipe joint for couplng with a plain plastic pipe end, said restraining ring and gland comprising: semi-circular ring members each having opposite end flanges adapted to be fastened together for securing said ring members together around said plastic pipe; said members having cylindrical tapered bore portions having roughened surfaces sized to engage the outer surface of said plastic pipe, said bore portions being tapered toward the pressure end of said ring member; said bore portions having annular longitudinally spaced serrations having blunt inside edges arranged circumferentially around said bore for gripping the outer surface of said plastic pipe, said roughened surfaces and said spaced serrations in combination holding said pipe against longitudinal movement; said members emcompassing less than 360 degrees around said plastic pipe whereby said opposite end flanges are spaced apart on opposite sides of said gland when connected on said plastic pipe; and said members have means for connecting said gland with an adjacent pipe fitting on the pipe to which said gland is coupled by said joint.