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US 10,502,356 B2Granted
Liner for lateral pipe line
AssigneeSak Construction, LLC
InventorBoyd Hirtz
Life of this patent
Estimating the term…
Abstract
Systems and methods for forming and deploying a pipe liner in a pipe main having a service lateral. The line is formed from three pieces of material. The piece of material forming the front top and of the main liner and the front of the lateral line has a cutout at the joint to reduce bunching, which can result in non-uniform liner thickness and may form obstructions at the joint.
Claims16
A liner configured for trenchless installation in a pipe having a service lateral, the liner comprising:
- a main pipe liner portion comprising a bottom and an opposing top comprising a front top and an opposing back top;
- and
- a service lateral liner portion attached to said main pipe liner portion, said service lateral liner portion comprising opposing lateral sides and a front and opposing back;
- wherein a first contiguous piece, a second contiguous piece, and a third contiguous piece form said main pipe liner portion and said attached service lateral liner portion when assembled together;
- wherein said first contiguous piece comprises said opposing lateral sides and said bottom;
- wherein said second contiguous piece comprises said front and said front top and a cutout portion disposed at the joint between said front and said front top;
- wherein said third contiguous piece comprises said back and said back top;
- wherein said service lateral liner portion is attached to said main pipe liner portion at a non-perpendicular angle;
- wherein said second contiguous piece is in the configuration of a trapezoidal element corresponding to said front top and attached to a generally rectangular arm corresponding to said front;
- wherein said cutout portion is disposed at the joint between said generally rectangular arm and said trapezoidal element;
- and
- wherein said cutout portion is generally in the shape of a football formed by a top arc and a connected bottom arc.
9 more elements
A method for forming a liner comprising:
- providing a first contiguous piece comprising a hexagonal center generally corresponding to a bottom of a main pipe liner and having two elongated rectangular arms generally corresponding to lateral sides of a service lateral liner attached to said main pipe liner, said first contiguous piece being symmetrical around a midline of said hexagonal center;
- providing a second contiguous piece comprising a trapezoidal element corresponding to a front top of said main pipe liner and attached to a generally rectangular arm corresponding to a front of said service lateral;
- providing a third contiguous piece comprising a trapezoidal element corresponding to a back top of said main pipe liner and attached to a generally rectangular arm corresponding to a back of said service lateral;
- removing from said second contiguous piece an amount of material at the joint between said trapezoidal element and said attached generally rectangular arm, said amount of material being in the shape of a football defined by a top arc and an opposing bottom arc;
- and
- assembling said first contiguous piece, said second contiguous piece, and said third contiguous piece form said main pipe liner portion and service lateral liner attached thereto at the angle between said midline and the major axis of each of said arms.
3 more elements
Dependencies are inferred from the claim text.