Joint for different-diameter pipes and method of connecting different-diameter pipes

A joint for connecting different-diameter pipes- the joint comprising a cylindrical body having at least one inner circumferential surface with a diameter adapted to be larger than outer diameters of said different-diameter pipes, said cylindrical body having an axially intermediate portion, wherein said cylindrical body comprises:

• an annular inward projection projecting radially inward from said axially intermediate portion of said cylindrical body;
• a first cylindrical portion positioned at a first side of said annular inward projection and having an first inner surface;
• a second cylindrical portion positioned at a second side of said annular inward projection and having a second inner surface;
• a first annular outward projection projecting radially outward from said first cylindrical portion and forming a first annular space in said first cylindrical portion;
• a second annular outward projection projecting radially outward from said second cylindrical portion and forming a second annular space in said second cylindrical portion;
• a first through hole formed in said first annular outward projection for receiving a foamable and curable liquid agent;
• a second through hole formed in said second annular outward projection for receiving said foamable and curable liquid agent;
• a first sealing body connected to said first inner surface;
• and
• a second sealing body connected to said second inner surface, said first sealing body and said second sealing body comprising a compressible and deformable material,
• wherein a thickness of said first sealing body is different than that of said second sealing body.

A cylindrical joint for connecting different-diameter pipes, at least one of said different-diameter pipes being corrugated pipe, said cylindrical joint comprising:

• an annular inward projection projecting radially inward from said cylindrical joint;
• a first cylindrical portion positioned at a first side of said annular inward projection, and having a first inner surface having an inner diameter larger than an outer diameter of a first pipe of said different-diameter pipes;
• second cylindrical portion positioned at a second side of said annular inward projection, and having a second inner surface having an inner diameter larger than an outer diameter of a second pipe of said different diameter pipes;
• a first annular outward projection projecting radially outward from said first cylindrical portion and forming a first annular space in said first cylindrical portion;
• a second annular outward projection projecting radially outward from said second cylindrical portion and forming a second annular space in said second cylindrical portion;
• a first through-hole formed in said first annular outward projection for receiving a foamable and curable liquid agent;
• a second through-hole formed in said second annular outward projection for receiving said foamable and curable liquid agent;
• a first sealing body connected to said first inner surface, said first sealing body comprising a first flat annular band positioned adjacent said first annular outward projection and a second flat annular band positioned adjacent said first annular outward projection opposite said first flat annular band;
• and
• a second sealing body connected to said second inner surface, said second sealing body comprising a third flat annular band positioned adjacent said second annular outward projection and a fourth flat annular band positioned adjacent said second annular outward projection opposite said third flat annular band, said first sealing body and said second sealing body comprising a compressible and deformable material.

A joint for joining pipes comprising:

• a cylindrical body having an inner surface and an outer surface;
• an annular inward projection projecting inwardly from said inner surface;
• a first annular outward projection projecting outwardly from said outer surface and forming a first annular space along said inner surface;
• a second annular outward projection projecting outwardly from said outer surface and forming a second annular space along said inner surface;
• at least one first opening through said first annular outward projection;
• at least one second opening through said second annular outward projection;
• a first sealing body positioned on said inner surface adjacent said first annular outward projection, said first sealing body comprising a first flat annular band positioned adjacent said first annular outward projection and a second flat annular band positioned adjacent said first annular outward projection opposite said first flat annular band;
• a second sealing body positioned on said inner surface adjacent said second annular outward projection, said second sealing body comprising a third flat annular band positioned adjacent said second annular outward projection and a fourth flat annular band positioned adjacent said second annular outward projection opposite said third flat annular band;
• and
• a foamable adhesive, injected through said first opening and said second opening into said first annular space and said second annular space, for forming a water-tight seal between said inner surface and said pipes.