US Patent No. 9,751,134

TOOTHFORM FOR A CUTTING TOOL, SUCH AS A HOLE SAW


Patent No. 9,751,134
Issue Date September 05, 2017
Title Toothform For A Cutting Tool, Such As A Hole Saw
Inventorship Jason M. Thom, Wauwatosa, WI (US)
Geoffrey R. Piller, Whitefish Bay, WI (US)
Ryan J. Malloy, Milwaukee, WI (US)
Assignee MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)

Claim of US Patent No. 9,751,134

1. A cutting tool comprising:
a generally cylindrical body having an open end and a closed end;
a plurality of cutting teeth formed on the open end of the generally cylindrical body, each cutting tooth including a tip,
a rake face extending from the tip, and a relief surface extending from the tip;

a plurality of non-cutting protrusions formed on the open end of the generally cylindrical body, each non-cutting protrusion
having an apex;

a plurality of primary gullets formed on the open end of the generally cylindrical body, each primary gullet being formed
between one of the plurality of cutting teeth and one of the plurality of non-cutting protrusions, each primary gullet having
a base and a primary gullet depth measured from the base to the tip of a corresponding cutting tooth; and

a plurality of secondary gullets formed on the open end of the generally cylindrical body, each secondary gullet defined by
the relief surface of each cutting tooth between the cutting tooth and one of the plurality of non-cutting protrusions, each
secondary gullet having a base and a secondary gullet depth measured from the base to the tip of a corresponding cutting tooth;

wherein each non-cutting protrusion is located approximately halfway between the tips of two adjacent cutting teeth, and wherein
each non-cutting protrusion has a height measured from the base of the primary gullet to the apex that is at most about 75%
of the primary gullet depth,

wherein the secondary gullet depth of each secondary gullet is shallower than the primary gullet depth of each primary gullet;
wherein the primary gullet depths of adjacent primary gullets are varied.