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 Self-centering plastic pipe router tool

Details
Inventors: Nygards, Nils;
Assignee:
Primary Examiner: Paumen; Gary F.
Assistant Examiner: Schultz; Robert
Attorney, Agent or Firm: Faegre & Benson

A self-centering plastic pipe router tool is described for routing of a sawed-off end of pipe from the interior surface of a salvageable pipe. The router tool is a disk with an axial shank on one side of the disk. A pair of cutting flanges extend radially outwardly and upwardly in the direction of the axial shank from the disk perimeter to form first and second cutting edges. A concentric cylindrical skirt extends downwardly from the disk for axial centering of the router tool within the waste pipe ID. The first cutting edges are sized for routing of the waste pipe and the second cutting edges are sized to plane and re-finish the interior surface of the salvageable pipe for re-use.

DETAILED DESCRIPTION A self-centering plastic pipe router tool comprises a longitudinal axial shank for securing the router tool to the chuck of a standard hand drill.
The router tool has a router head in the form of a disk.
The disk has a proximal and a distal face and the shank is axially attached to the proximal face of the disk.
The disk is integrally formed with a plurality of knife edge cutter blades extending radially outward from the disk perimeter.
Each blade is bent radially proximally at a first position, at essentially the perimeter of the disk, to form a first cutting edge, of an angle intermediate the planar proximal face of the disk and the longitudinal axis of the shank.
Each blade is also bent further proximally at a second position, closer to the tip end of the blade, to form a second cutting edge essentially parallel to the longitudinal axis of the shank.
The disk has a self-centering skirt means extending distally from the distal face of the disk, substantially cylindrically concentric with the disk perimeter and axially concentric with the longitudinal axis of the shank.
The present novel router tool is designed to be retained by its shank within the chuck of a standard hand drill for routing of a waste end segment of a plastic pipe adhered to the interior surface of a salvageable plastic pipe or pipe fitting.
The self-centering skirt is sized to the waste pipe interior diameter to axially center the router tool therewith.
The first cutting edges are sized and adapted for routing of the waste pipe.
The second cutting edges are sized and adapted to plane and re-finish the interior surface of the salvageable pipe or pipe fitting.



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