Rotary cutting tool
OwnerJonathan R. Campianinventor
Life of this patent
Estimating the term…
Abstract
A rotary cutting tool is disclosed having an evacuation bore in a shank and generally radially extending passages opening to the bore to conduct away material being removed by cutters. Intersecting cutters are disposed at the intersections of right and left-hand flutes in the tool shank. The right-hand flutes extend along the entire length of the tool shank. The left-hand flutes extend from one end of the shank to an opposite end spaced from the lead end of the shank to leave only the end portion of the right-hand flutes extending to a lead end of the tool shank.
Claims6
A rotary cutting tool particularly adapted for cutting plastic material comprising:
- a cylindrical body having a longitudinal axis and including a longitudinally extending shank having opposed ends;
- right-hand longitudinally extending helical flute grooving in the shank, the right-hand helical flute grooving extending continuously from one end of the shank to a first end point of the opposite end of the shank;
- left-hand longitudinally extending helical flute grooving in the shank, the left-hand helical flute grooving extending from one end of the shank to a second end point spaced from the first end point of the opposite end of the shank;
- and intersecting cutters located at intersections of the right-hand and the left-hand helical groovings.
A rotary cutting tool particularly adapted for cutting plastic material comprising:
- a longitudinally extending cylindrical shank having an axially extending evacuation bore extending between first and second ends of the shank;
- right-hand longitudinally extending helical flute grooving in the cylindrical shank, the right-hand flute grooving extending from the first end to a first end point of the second end of the shank;
- left-hand longitudinally extending helical flute grooving in the cylindrical shank, the left-hand flute grooving extending from the first end of the shank to an second end point spaced from the first end point of the second end of the shank;
- a cutter located at each intersection of the right-hand and the left-hand helical flute groovings, each cutter having a pair of cutting edges, one cutting edge being parallel to the right-hand flute grooving and the other cutting edge being parallel to the left-hand flute grooving;
- radially extending passage means between at least one of the flute groovings and the evacuation bore;
- and
- wherein the passage means is fluidly connected to the evacuation bore so that material removed from a workpiece by the cutters is evacuated through the passage means and the evacuation bore.
Dependencies are inferred from the claim text.