Saw blade

Patent metadata

Field	Value
Publication number	US-10112244-B2
Application number	US-201414295449-A
Country	US
Kind code	B2
Filing date	Jun 4, 2014
Priority date	Apr 22, 2010
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A reciprocating saw blade includes a body, an attachment portion coupled to a first end portion of the body, and a cutting portion formed on the body. The cutting portion includes a plurality of cutting teeth. Each cutting tooth includes a tip, a rake face, and a relief surface. The tips of the plurality of cutting teeth define a plane. The saw blade also includes a plunge point formed on a second end portion of the body for initiating a plunge cut. The plunge point includes a leading tooth and a second tooth. The leading tooth includes a tip and a rake face and defines a leading gullet. The second tooth is positioned in the leading gullet closer to the leading tooth than to a nearest cutting tooth of the plurality of cutting teeth. The second tooth includes a tip that is spaced apart from the plane.

First claim

The invention claimed is:

1. A reciprocating saw blade for use with a reciprocating saw, the reciprocating saw blade comprising:
a body having a first end portion and a second end portion, the body defining a longitudinal axis;
an attachment portion coupled to the first end portion of the body, the attachment portion including a tang and an aperture configured to couple to the reciprocating saw;
a cutting portion formed on the body, the cutting portion including a plurality of cutting teeth, each cutting tooth including a tip, a rake face, and a relief surface, each tip being an apex of the corresponding cutting tooth, the tips of the plurality of cutting teeth defining a plane; and
a plunge point formed on the second end portion of the body for initiating a plunge cut, the plunge point including a leading tooth and a second tooth, the leading tooth including a tip and a rake face and defining a leading gullet that extends from the rake face of the leading tooth to the plurality of cutting teeth, the second tooth being positioned in the leading gullet closer to the leading tooth than to a nearest cutting tooth of the plurality of cutting teeth, the second tooth including a tip that is an apex of the second tooth and that is spaced apart from the plane;
wherein the leading tooth and the second tooth of the plunge point are in line with the plurality of cutting teeth of the cutting portion to form a linear cutting edge;
wherein the cutting portion also includes a plurality of gullets formed between the plurality of cutting teeth, and wherein the leading gullet is larger than each gullet of the plurality of gullets.

2. The reciprocating saw blade of claim 1 , wherein the tip of the leading tooth also defines the plane.

3. The reciprocating saw blade of claim 1 , wherein the second tooth is the only tooth positioned within the leading gullet between the leading tooth and the plurality of cutting teeth.

4. The reciprocating saw blade of claim 1 , wherein the leading gullet is at least twice as large as each gullet of the plurality of gullets.

5. The reciprocating saw blade of claim 4 , wherein the leading gullet is approximately four times larger than each gullet of the plurality of gullets.

6. The reciprocating saw blade of claim 1 , wherein each cutting tooth has a first utmost width measured generally parallel to the longitudinal axis, the leading tooth has a second utmost width measured generally parallel to the longitudinal axis, and the second tooth has a third utmost width measured generally parallel to the longitudinal axis, and wherein the third utmost width is less than the first utmost width and the second utmost width.

7. The reciprocating saw blade of claim 1 , wherein a ratio between a distance from the tip of the leading tooth to the tip of the nearest cutting tooth, measured generally parallel to the longitudinal axis, and a distance between the tips of adjacent cutting teeth, measured generally parallel to the longitudinal axis, is approximately 2.0.

8. The reciprocating saw blade of claim 1 , wherein a ratio between a distance from the tip of the leading tooth to the tip of the nearest cutting tooth, measured generally parallel to the longitudinal axis, and a distance from the tip of the leading tooth to the tip of the second tooth, measured generally parallel to the longitudinal axis, is approximately 6.6.

9. The reciprocating saw blade of claim 1 , wherein a ratio between a distance from the tip of the leading tooth to the tip of the second tooth, measured generally parallel to the longitudinal axis, and a distance between the tips of adjacent cutting teeth, measured generally parallel to the longitudinal axis, is approximately 0.3.

10. The reciprocating saw blade of claim 1 , wherein the second tooth is generally triangular-shaped.

11. The reciprocating saw blade of claim 1 , wherein the second tooth includes a rake face extending generally toward the longitudinal axis, and wherein a first angle between the plane and the rake face of the second tooth, measured through the second tooth, is greater than 90 degrees.

12. The reciprocating saw blade of claim 11 , wherein the first angle is approximately 95 to 105 degrees.

13. The reciprocating saw blade of claim 11 , wherein a second angle between the plane and the rake face of each cutting tooth, measured through the corresponding cutting tooth, is less than 90 degrees.

14. The reciprocating saw blade of claim 11 , wherein a third angle between the plane and the rake face of the leading tooth, measured through the leading tooth, is greater than 90 degrees.

15. The reciprocating saw blade of claim 1 , wherein the leading tooth includes a relief surface extending from the tip of the leading tooth to an end of the body.

16. The reciprocating saw blade of claim 15 , wherein the end of the body is generally rounded.

17. The reciprocating saw blade of claim 15 , wherein a first angle between the plane and the relief surface of the leading tooth is at least twice as large as a second angle between the plane and the relief surface of each cutting tooth.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Butzen Robert W
• Kazda Austin J
• Schulz Andrew J

Classifications

• B23D61/128

  Sabre saw blades · 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

• Y10T83/9319

  Toothed blade or tooth therefor · CPC title

• B23D61/1265

  Reciprocating blades with teeth on the saw nose, e.g. plunge cutters · CPC title