Saw blade including a cutting tooth with a protrusion

Patent metadata

Field	Value
Publication number	US-12377481-B2
Application number	US-202217858280-A
Country	US
Kind code	B2
Filing date	Jul 6, 2022
Priority date	May 16, 2017
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

A saw blade includes a cutting portion having consecutive first, second, and third cutting teeth. Each cutting tooth includes a rake surface, a relief surface, and a tip. The first cutting tooth includes a protrusion extending from the relief surface of the first cutting tooth. The cutting portion includes a first gullet positioned between the first cutting tooth and the second cutting tooth and a second gullet sized differently than the first gullet positioned between the second cutting tooth and the third cutting tooth. The cutting portion includes a first pitch extending over the first gullet from the tip of the first cutting tooth to the tip of the second cutting tooth. The cutting portion includes a second pitch different than the first pitch extending over the second gullet from the tip of the second cutting tooth to the tip of the third cutting tooth.

First claim

What is claimed is:

1. A saw blade for use with a power tool, the saw blade comprising:
a body defining a longitudinal axis; and
a cutting portion formed on the body, the cutting portion including consecutive first and second cutting teeth, the first and second cutting teeth each including a rake surface, a relief surface, and a tip positioned between the rake and relief surfaces, the first cutting tooth including a protrusion extending from an end of the relief surface of the first cutting tooth opposite the tip, the second cutting tooth does not include a protrusion on the relief surface of the second cutting tooth, the cutting portion including a gullet positioned between the first cutting tooth and the second cutting tooth,
wherein the protrusion of the first cutting tooth is configured to inhibit a nail from entering the first gullet and contacting the rake surface of the second cutting tooth during a cutting operation;
wherein a first distance, measured perpendicular to the longitudinal axis, from the end of the relief surface of the first cutting tooth to the body is smaller than a second distance, measured perpendicular to the longitudinal axis, from an apex of the protrusion of the first cutting tooth to the body;
wherein the protrusion of the first cutting tooth includes an apex defining an apex plane parallel to the longitudinal axis; and
wherein the tip of the first cutting tooth and the end of the relief surface of the first cutting tooth are positioned on opposite sides of the apex plane.

2. The saw blade of claim 1 , wherein the cutting portion further includes a third cutting tooth and a second gullet positioned between the second cutting tooth and the third cutting tooth, wherein the second gullet is smaller than the first gullet.

3. The saw blade of claim 1 , wherein the cutting portion further includes:
a third cutting tooth having a rake surface, a relief surface, and a tip positioned between the rake and relief surfaces;
a second gullet positioned between the second cutting tooth and the third cutting tooth;
a first pitch extending over the first gullet from the tip of the first cutting tooth to the tip of the second cutting tooth; and
a second pitch extending over the second gullet from the tip of the second cutting tooth to the tip of the third cutting tooth, wherein the second pitch is less than the first pitch.

4. The saw blade of claim 3 , wherein an apex of the protrusion of the first cutting tooth is spaced a first distance, measured parallel to the longitudinal axis, from the tip of the first cutting tooth, wherein the apex of the protrusion of the first cutting tooth is spaced a second distance, measured parallel to the longitudinal axis, from the tip of the second cutting tooth, wherein the first distance is not equal to the second distance, wherein a ratio of the second pitch to the first distance is between about 1.3 and 3.1, and wherein a ratio of the second pitch to the second distance is between about 0.8 and 1.3.

5. The saw blade of claim 1 , wherein the cutting portion further includes a third cutting tooth immediately adjacent the second cutting tooth, the third cutting tooth having a rake surface, a relief surface, a tip positioned between the rake and relief surfaces, and a protrusion extending from an end of the relief surface of the third cutting tooth.

6. The saw blade of claim 1 , further comprising an attachment portion coupled to an end of the body and configured to couple to the power tool.

7. The saw blade of claim 1 , wherein the rake faces of the first and second cutting teeth extend from the corresponding tips at a positive rake angle.

8. The saw blade of claim 1 , wherein the rake faces of the first and second cutting teeth extend from the corresponding tips at a negative rake angle.

9. The saw blade of claim 1 , wherein the rake face of one of the first and second cutting teeth extends from the corresponding tip at a negative rake angle, and the rake face of the other of the first and second cutting teeth extends from the corresponding tip at a positive rake angle.

10. A saw blade for use with a power tool, the saw blade comprising:
a body defining a longitudinal axis; and
a cutting portion formed on the body, the cutting portion including consecutive first, second, and third cutting teeth, the first, second, and third cutting teeth each including a rake surface, a relief surface, and a tip positioned between the rake and relief surfaces, the first cutting tooth including a protrusion extending from an end of the relief surface of the first cutting tooth, the second cutting tooth not including a protrusion on the relief surface of the second cutting tooth, the third cutting tooth including a protrusion extending from an end of the relief surface of the third cutting tooth, the cutting portion including a first gullet positioned between the first cutting tooth and the second cutting tooth,
wherein the protrusion of the first cutting tooth is configured to inhibit a nail from entering the first gullet and contacting the rake surface of the second cutting tooth during a cutting operation,
wherein the tips of the first and second cutting teeth define a plane, and wherein an apex of the protrusion of the first tooth is spaced apart from the plane and positioned between the plane and the body.

11. The saw blade of claim 10 , wherein the protrusions of the first and third cutting teeth define a plane, and the tip of the first cutting tooth and a portion of the relief surface of the first cutting tooth are positioned on opposite sides of the plane.

12. The saw blade of claim 10 , wherein the cutting portion further includes:
a second gullet positioned between the second cutting tooth and the third cutting tooth;
a first pitch extending over the first gullet from the tip of the first cutting tooth to the tip of the second cutting tooth; and
a second pitch extending over the second gullet from the tip of the second cutting tooth to the tip of the third cutting tooth, wherein the second pitch is less than the first pitch.

13. The saw blade of claim 12 , wherein the first pitch equates to a pitch between 5 teeth per inch and 9 teeth per inch, and wherein the second pitch equates to a pitch between 9 teeth per inch and 13 teeth per inch.

14. The saw blade of claim 12 , wherein the tips of the first, second, and third cutting teeth define a tip plane, and wherein the first gullet includes a first gullet depth measured from a base of the first gullet to the tip plane perpendicular to the tip plane, and wherein the second gullet includes a second gullet depth measured from a base of the second gullet to the tip plane perpendicular to the tip plane, and wherein the first gullet depth is greater than the second gullet depth.

15. The saw blade of claim 14 , wherein the first gullet depth is between 45% and 65% of the first pitch, and wherein the second gullet depth is between 45% and 65% of the second pitch.

16. The saw blade of claim 14 , wherein the protrusions of the first and third cutting teeth include apexes defining a protrusion plane, and wherein the protrusion plane is spaced a distance, measured perpendicular to the tip plane, from the base of the first gullet, and wherein a ratio of the distance over the first gullet depth is between 0.6 and 0.8.

17. The saw blade of claim 10 , wherein the third cutting tooth is formed on the body to include the same shape as the first cutting tooth.

18. A saw blade for use with a power tool, the saw blade comprising:
a body defining a longitudinal axis; and
a cutting

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Heath Peter R
• Ward Bryan C
• Rechlin Christopher J
• Kazda Austin J
• Lois Matthew B

Classifications

• B27B33/02 Primary

  Structural design of saw blades or saw teeth · CPC title

• B23D51/10

  for hand-held or hand-operated devices · CPC title

• B23D49/162

  Pad sawing devices · CPC title

• B23D61/123

  Details of saw blade body · CPC title

• B23D61/121 Primary

  Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet · CPC title