Pipe for lining passages
OwnerJames Caldwell, Lynn Osborninventors
Life of this patent
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Abstract
A pipe for lining a passage includes at least a first pipe section having a bell at one end and at least a second pipe section having a spigot at one end, adapted to mate with the bell of the first pipe section. The pipe sections are closed molded to form the final geometry of the bell and spigot. At least one of the bell of the first pipe section or the spigot of the second pipe section has a circumferential groove molded therein to substantially its final shape. An elastomeric gasket sized to fit in the groove forms a compression seal between the first pipe section and the second pipe section.
Claims20
A pipe for lining a pre-existing passage comprising:
- at least a first pipe section having a bell at one end, the bell having a planar end wall;
- at least a second pipe section having a pipe body and a spigot at one end, the spigot having a terminal end portion and a planar end wall, the terminal end portion having the same shape and approximate size as the pipe body, the spigot adapted to mate with the bell of the first pipe section;
- said first and second pipe sections both being closed molded;
- the first and second pipe sections each having a non-circular cross-section taken perpendicular to the longitudinal axis of the pipe;
- at least one of the bell of the first pipe section or the spigot of the second pipe section having a groove molded therein to substantially its final shape, the groove being spaced apart from the spigot end wall;
- and
- an elastomeric gasket sized to fit in said groove to form a compression seal between the first pipe section and the second pipe section.
(canceled)
A pipe section for a liner pipe, the pipe section having a non-circular cross-section taken perpendicular to its longitudinal axis, the pipe section comprising:
- a pipe body having a planar end wall and a groove closed molded therein at one end of the pipe body, said pipe body having one end that is closed molded to have an outer size and a second end that is closed molded to have an inner size, the inner size of the second end being greater than the outer size of the first end, said pipe body having an inner size, except at said second end, that is less than the outer size of the first end;
- and a terminal end portion located intermediate the planar end wall and the groove, the terminal end portion having substantially the same shape and approximate size as the pipe body.
A pipe for lining a pre-existing passage comprising:
- at least a first pipe section having a bell at one end, the bell having a planar end wall;
- at least a second pipe section having a pipe body and a spigot at one end, the spigot having a terminal end portion and a planar end wall, the terminal end portion having the same shape and approximate size as the pipe body, the spigot adapted to mate with the bell of the first pipe section;
- a compression packing disposed between the first pipe section and the second pipe section;
- at least one of the bell of the first pipe section or the spigot of the second pipe section having a circumferential groove molded therein to substantially its final shape, the circumferential groove being spaced apart from the spigot end wall;
- and
- an elastomeric gasket sized to fit in said circumferential groove to form a compression seal between the first pipe section and the second pipe section.
Dependencies are inferred from the claim text.