Reciprocating Saw Blade with Plunge Nose

• US 20090145280A1
• Filed: 10/30/2008
• Published: 06/11/2009
• Est. Priority Date: 12/11/2007
• Status: Abandoned Application

• Current Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Original Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Inventors: Bucks, Brent L., Lowder, Jeremy A.
• Application Number:
  US12/261,186
• Publication Number:
  US 20090145280A1
• Time in Patent Office: Days
• US Class Current: 83/835
• CPC Class Codes: B23D 61/121 Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet
• CPC Class Codes: B23D 61/126 having cutting teeth along both edges
• CPC Class Codes: B23D 61/128 Sabre saw blades
• CPC Class Codes: B23D 65/02 Making saw teeth by punching, cutting, or planing
• CPC Class Codes: Y10T 83/9319 Toothed blade or tooth therefor
• CPC Class Codes: Y10T 83/936 Series of allochiral teeth

Abstract

A reciprocating saw blade has a body with two ends and two edges. The first end is a shanking end to secure the blade with a reciprocating saw. The second end is a plunging end to enter into a workpiece. The first edge has a plurality of teeth and gullets. A second edge opposes the first edge. The plurality of teeth has a first tooth immediately adjacent the plunging end. The first tooth is a full tooth and is also a raker or unset tooth. The first gullet adjacent the first tooth has a size at least 1.5 times the gullet size of the remainder of the plurality of gullets.

Claims

1. A reciprocating saw blade comprising:

a body having two ends and two edges, a first shanking end for securing the blade with a reciprocating saw and a second plunging end for entering a workpiece, a first edge having a plurality of teeth and gullets, said plurality of teeth and gullets being the same size, a second back edge opposing said first edge; and

said plurality of teeth having a first tooth immediately adjacent said plunging end, said first tooth having a size substantially equal to the remainder of teeth of said plurality of teeth, said first tooth being a full tooth and also a raker or unset tooth, a first gullet adjacent said first tooth said first gullet having a size at least 1.5 times the gullet size of the remainder of gullets of said plurality of gullets.

2. The reciprocating saw blade according to claim 1, wherein said first gullet size is from 2 to 5.5 times the size of said plurality of gullets.

3. The reciprocating saw blade according to claim 1, wherein said first tooth having relief face on a relief angle of about 35°

to 50°

.

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

5. The reciprocating saw blade of claim 1, wherein said plurality of teeth are set teeth.

6. A reciprocating saw blade comprising:

a body having two ends and two edges, a first shanking end for securing the blade with a reciprocating saw and a second plunging end for entering a workpiece, a first edge having a plurality of teeth and gullets, said plurality of teeth and gullets being the same size, a second back edge opposing said first edge; and

said plurality of teeth having a first tooth immediately adjacent said plunging end, said first tooth having a size substantially equal to the reminder of teeth of said plurality of teeth, said first tooth being a full tooth and also a raker or unset tooth;

said plurality of teeth having substantially the same size and one tooth immediately adjacent said first tooth of said plurality of teeth is missing from said plurality of teeth forming a gap between said first tooth and said plurality of teeth so that said first tooth engages a workpiece during plunge cutting and initiates a kurf prior to the remaining plurality of teeth contacting the workpiece.

7. The reciprocating saw blade of claim 6, wherein two teeth of said plurality of teeth are missing to form said gap.

8. The reciprocating saw blade according to claim 6, wherein said first tooth having a relief face on a relief angle of about 30°

to 50°

.

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

10. The reciprocating saw blade of claim 6, wherein said plurality of teeth are set teeth.

11. The reciprocating saw blade of claim 6, wherein a cutting edge is formed at the intersection of said relief face and an end surface of the second edge.

12. A method for manufacturing a reciprocating saw blade comprising:

forming a plurality of teeth into coil stock;

feeding said coil stock into a die set;

locating the teeth on said coil stock in said die set;

flattening a portion of said teeth on said coil stock in said die set;

forming a first tooth and a first gullet of a reciprocating saw blade out of said flattened portion of said coil stock in said die set; and

forming a reciprocating saw blade having a first tooth with a first gullet, said first gullet being enlarged with respect to remaining gullets of said plurality of gullets.

13. The method of claim 12, further comprising said flattening, flattening at least three teeth of said plurality of teeth.

14. The method of claim 12, further comprising punching said coil stock to form said first tooth, first gullet, third tooth and saw blade.

15. The method of claim 12, further comprising milling and setting said plurality of teeth on said coil stock.

16. The method of claim 15, further comprising flattening said set teeth to form said first tooth and third tooth as a raker or unset teeth.

17. The method of claim 12, further comprising said first gullet having a size 1.5 to 5.5 times the size of the remaining gullets of said plurality of gullets.