Toothform for a cutting tool, such as a hole saw
AssigneeMilwaukee Electric Tool Corporation
InventorsJason M. Thom, Geoffrey R. Piller, Ryan J. Malloy
Life of this patent
Estimating the term…
Abstract
A cutting tool includes a body, a plurality of cutting teeth formed on the body, a plurality of non-cutting protrusions formed on the body, and a plurality of gullets formed on the body. Each gullet is formed between one of the plurality of cutting teeth and one of the plurality of non-cutting protrusions. Each gullet has a base and a gullet depth measured from the base to a tip of a corresponding cutting tooth. Each non-cutting protrusion is located approximately halfway between the tips of two adjacent cutting teeth and has a height that is at most about 75% of the gullet depth.
Claims22
A cutting tool comprising:
- a body having a cutting edge;
- a plurality of cutting teeth formed on the cutting edge of the 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 cutting edge of the body, each non-cutting protrusion having an apex;
- a plurality of primary gullets formed on the cutting edge of the 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 cutting edge of the 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;
- and
- wherein the secondary gullet depth of each secondary gullet is shallower than the primary gullet depth of each primary gullet.
A cutting tool comprising:
- a body having a cutting edge;
- a plurality of cutting teeth formed on the cutting edge of the body, each cutting tooth including a tip, a rake face extending from the tip, a planar relief portion extending from the tip, a concave relief portion extending from the planar relief face portion, and a convex relief portion extending from the concave relief portion;
- and
- a plurality of gullets formed on the cutting edge of the body, each gullet being formed between the rake face of one cutting tooth and the convex relief portion of an adjacent cutting tooth, each gullet having a base and a gullet depth measured from the base to the tip of a corresponding cutting tooth;
- wherein each convex relief portion is located approximately halfway between the tips of two adjacent cutting teeth;
- wherein each cutting tooth has a tooth width measured from the rake face through the convex relief portion, and wherein the concave relief portion of each cutting tooth forms at least about 40% of the tooth width;
- wherein a first height, measured from the base of each gullet to the convex relief portion of the corresponding cutting tooth, is between about 55% and 75% of the gullet depth;
- and
- wherein the planar relief portion of each cutting tooth forms at most about 35% of the tooth width.
Dependencies are inferred from the claim text.