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US 7,681,924 B2Granted
Fused butt joint for plastic pipe
AssigneeFast Fusion, LLC
InventorWilliam J. Temple
Life of this patent
Estimating the term…
Abstract
A method, apparatus, and design of a fusion welded pipe wherein the effects of an inner bead of the fusion weld are minimized. The internal shape of the pipe prior to welding may be configured in several different shapes so that the beads or lips produced by the fusion welding process are unobtrusive and do not interfere with the function of the pipe. In a likewise manner, the outer shape of the pipe prior to welding may be configured so that the lips are unobtrusive on the external surface of the pipe.
Claims6
A fused butt joint comprising:
- a first plastic pipe having a normal inner diameter and an interior wall, said pipe having an undercut region on the interior wall near said butt joint;
- a second plastic pipe having a normal inner diameter and an interior wall, said pipe having an undercut region on the interior wall near said butt joint;
- and
- a bead formed by the heat fusing of said first pipe to said second pipe, said bead being disposed within only a portion of each of the undercut regions of said first and second pipes.
1 more element
A fused butt joint comprising:
- a first plastic pipe having interior and exterior walls, said pipe having undercut regions on the interior and exterior walls thereof near said butt joint;
- a second plastic pipe having interior and exterior walls, said pipe having undercut regions on the interior and exterior walls thereof near said butt joint;
- and
- an interior bead and an exterior bead disposed within only a portion of the undercut regions of the interior and exterior walls, respectively, of said first and second pipes.
1 more element
A fused butt joint comprising:
- a first plastic pipe having a normal outer diameter and an exterior wall, said pipe having an undercut region on the exterior wall thereof near said butt joint;
- a second plastic pipe having a normal outer diameter and an exterior wall, said pipe having an undercut region on the exterior wall thereof near said butt joint;
- and
- a bead formed by the heat fusing of said first pipe to said second pipe, said bead being disposed within only a portion of each of the undercut regions of said first and second pipes.
1 more element
Dependencies are inferred from the claim text.