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US 2006/0032349 A1Published application
Beveled cutter
AssigneePE Fusion, LLC
InventorWilliam Temple
Life of this patent
Estimating the term…
Abstract
Disclosed is 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.
Claims3
A fused butt joint for plastic pipe with at least a partially recessed internal bead comprising:
- a first pipe having an undercut region near said butt joint substantially axially symmetric and having a profile that is formed by cutting said first plastic pipe substantially perpendicular to the axis of said first pipe with a profile that reduces the wall thickness of said first pipe with an undercut region on the internal side of said first pipe;
- a second pipe having an undercut region near said butt joint substantially axially symmetric and having a profile that is formed by cutting said second plastic pipe substantially perpendicular to the axis of said second pipe with a profile that reduces the wall thickness of said second pipe with an undercut region on the internal side of said second pipe;
- and a bead formed by the heat fusing of said first pipe to said second pipe.
Dependencies are inferred from the claim text.