Reciprocating saw blade with plunge nose

Patent metadata

Field	Value
Publication number	US-10702934-B2
Application number	US-201615045529-A
Country	US
Kind code	B2
Filing date	Feb 17, 2016
Priority date	Dec 11, 2007
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A reciprocating saw blade includes a body formed from a piece of coil stock. The body has a shank end configured to secure the blade with a reciprocating saw, a plunging end configured to enter a workpiece, and a cutting edge and opposite back edge extending between the shank end and the plunging end. The cutting edge has a plurality of teeth arranged in a pattern that includes left and right set teeth. A plurality of gullets is disposed between adjacent teeth. Each of the teeth and the gullets has substantially the same size, except that the first and third consecutive teeth immediately adjacent the plunging end have been flattened to be unset, and at least a portion of the second consecutive tooth has been removed to form an enlarged gullet between the first and third teeth.

First claim

What is claimed is:

1. A reciprocating saw blade comprising:
a body formed from a piece of coil stock and having a shank end configured to secure the blade with a reciprocating saw, a plunging end configured to enter a workpiece, a cutting edge extending between the shank end and the plunging end, and a back edge opposite the cutting edge and extending between the shank end and the plunging end,
the cutting edge having a plurality of teeth arranged in a pattern that includes left and right set teeth, and a plurality of gullets disposed between adjacent teeth in the plurality of teeth, each of the plurality of teeth and the plurality of gullets having substantially the same size,
except that a first tooth immediately adjacent the plunging end has been flattened to be unset, a third tooth of the plurality of teeth counting consecutively from the first tooth has been flattened to be unset, and at least a portion of a second tooth of the plurality of teeth counting consecutively from the first tooth has been removed to form an enlarged gullet between the first tooth and the third tooth, the enlarged gullet being larger than the remaining gullets in the plurality of gullets.

2. The reciprocating saw blade of claim 1 , wherein the piece of coil stock has the plurality of teeth formed in the pattern prior to being formed into the body.

3. The reciprocating saw blade of claim 2 , wherein the first tooth is formed and the at least a portion of the second tooth is removed by punching the coil stock to form the first tooth and the enlarged gullet.

4. The reciprocating saw blade of claim 1 , wherein the size of the enlarged gullet is approximately twice the size of the remaining gullets of the plurality of gullets.

5. The reciprocating saw blade of claim 1 , wherein the first tooth has a relief face on, a relief angle of about 35° to 50°.

6. The reciprocating saw blade of claim 1 , wherein said, plunging end has an end surface intersecting said first tooth forming a cutting edge.

7. The reciprocating saw blade of claim 1 , wherein the back edge is not parallel to the cutting edge.

8. The reciprocating saw blade of claim 1 , wherein an entirety of the second tooth has been removed from the body.

9. The reciprocating saw blade of claim 1 , wherein the pattern further includes unset teeth.

10. A reciprocating saw blade comprising:
a body having a shanking end configured to secure the blade with a reciprocating saw, a plunging end configured to plunge into a workpiece, a back edge extending between the shanking end and the plunging end, and a cutting edge extending between the shanking end and the plunging end,
wherein the cutting edge includes a plurality of teeth including at least four consecutive cutting teeth each defining a cutting gullet between adjacent cutting teeth, all of the at least four consecutive cutting teeth being substantially the same size and all of the cutting gullets being substantially the same size,
wherein the cutting edge further includes a plunging tooth immediately adjacent the plunging end and a plunging gullet between the plunging tooth and a leading tooth of the at least four consecutive teeth that is closest to the plunging end, both the plunging tooth and the leading tooth being unset, and
wherein a distance between the plunging tooth and the leading tooth is at least twice a distance between each pair of adjacent teeth in the at least four consecutive teeth.

11. The reciprocating saw blade of claim 10 , wherein the distance between the plunging tooth and the leading tooth is twice a distance between each pair of adjacent teeth in the plurality of teeth.

12. The reciprocating saw blade of claim 10 , wherein the plunging gullet is 1.5 to 5.5 times the size of the cutting gullets.

13. The reciprocating saw blade of claim 10 , wherein the plunging tooth is configured to engage a workpiece during plunge cutting and initiate a kurf prior to the leading tooth contacting the workpiece.

14. The reciprocating saw blade of claim 10 , wherein the plunging end has a plunging tip, an end surface extending from the plunging tip toward the back edge at an angle to the back edge, and a relief edge extending from the plunging tip toward the cutting edge at an angle to the cutting edge.

15. The reciprocating saw blade of claim 14 , wherein the plunging tip has a cutting edge at a junction between the end surface and the relief edge.

16. The reciprocating saw blade of claim 10 , wherein the cutting teeth behind the leading tooth include set teeth.

17. The reciprocating saw blade of claim 10 , wherein the back edge not parallel to the cutting edge.

18. The reciprocating saw blade of claim 10 , wherein the body has been formed from a piece of coil stock having the plurality of teeth formed in the pattern, and the at least a portion of a second tooth between the plunging tooth and the leading tooth has been removed to form the plunging gullet.

19. The reciprocating saw blade of claim 18 , wherein an entirety of the second tooth has been removed from the body.

20. A reciprocating saw blade comprising:
a body formed from a piece of coil stock having a plurality of teeth arranged in a pattern that includes left set teeth, right set teeth, and unset teeth, and a plurality of gullets, each of the plurality of teeth and the plurality of gullets having substantially the same size,
the body being formed to have a shank end configured to secure the blade with a reciprocating saw, a plunging end configured to enter a workpiece, a cutting edge extending between the shank end and the plunging end and defined by the plurality of cutting teeth, and a back edge opposite and non-parallel to the cutting edge and extending between the shank end and the plunging end,
wherein, a first tooth immediately adjacent the plunging end is flattened to be unset and has a portion removed to have a different configuration than the remaining plurality of teeth,
wherein a third tooth counting consecutively from the first tooth is flattened to be unset, and
wherein at least a portion of a second tooth counting consecutively from the first tooth is removed to form an enlarged gullet between the first tooth and the third tooth, the enlarged gullet having a size approximately twice a size of the remaining gullets in the plurality of gullets.

Assignees

• Black & Decker Inc

Inventors

• Bucks Brent L
• Lowder Jeremy A

Classifications

• B23D61/1265 Primary

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

• B23D61/128

  Sabre saw blades · CPC title

• B23D65/02

  Making saw teeth by punching, cutting, or planing · CPC title

• Y10T83/9319

  Toothed blade or tooth therefor · CPC title

• B23D61/126

  having cutting teeth along both edges · CPC title