Circular saw blade

• US 5,896,800 A
• Filed: 07/09/1996
• Issued: 04/27/1999
• Est. Priority Date: 09/26/1995
• Status: Expired due to Term

• Current Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Original Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Inventors: Achterberg, Nicholas E., Curtsinger, John R.
• Primary Examiner(s): PETERSON, KENNETH E
• Application Number:
  US08/677,152
• Time in Patent Office: 1,022 Days
• Field of Search: 83/835
• US Class Current: 83/835
• CPC Class Codes: B23D 61/025 Details of saw blade body
• CPC Class Codes: B23D 61/04 with inserted saw teeth , i.e. the teeth being individually inserted
• CPC Class Codes: B23D 65/00 Making tools for sawing machines or sawing devices for use in cutting any kind of material
• CPC Class Codes: Y10T 83/9319 Toothed blade or tooth therefor

Abstract

A saw blade is stamped with a circumferential edge. At least one deep gullet and shoulder are formed in the circumferential edge. Likewise, a tooth pocket is formed in the circumferential edge. The tooth pocket is defined by a wall, generally radial to circle, on the shoulder, and a shelf substantially perpendicular to the wall. A tooth is secured, ordinarily by brazing, in the pocket such that the thickness of the tooth is substantially equal to the depth of the shelf and the face of the tooth is continuous with the gullet. The tooth may be brazed along its entire lateral edge such that resultant forces in the tooth are transmitted to the body of the blade. After the tooth is positioned into the tooth pocket, the tooth, as well as a projection of the blade shoulder, are ground off so that the tooth and shoulder are flush with one another. Thus, the tooth longitudinal edge is in complete contact with the shoulder wall maximizing its strength.

Claims

1. A saw blade comprising:

a body having a circumferential edge;

at least one gullet formed in said circumferential edge;

at least one shoulder formed in said circumferential edge adjacent said gullet;

a tooth pocket formed in said circumferential edge, said tooth pocket defining a wall and a shelf adjacent to said wall, said shelf having a desired depth;

a tooth secured in said pocket such that said tooth having a thickness substantially equal to the depth of said shelf so that a face of the tooth is continuous with the gullet, and said shelf enables a lateral edge of the tooth to be secured with the body, said gullet includes a first side angled with respect to the circumferential edge toward the tooth, a bottom, said bottom being on a straight tangent line to an arc which is concentric with the circumferential edge and a second side, terminating at said shelf and angled with respect to the circumferential edge away from the tooth, said first and second sides being directly continuous with said bottom and angled towards one another.

2. The saw blade according to claim 1, wherein said tooth edge and an area of the shoulder edge adjacent said tooth are flush with one another along the circumferential edge.

3. The saw blade according to claim 2, wherein a shallow arcuate recess is in said shoulder along the circumferential edge adjacent said area.

4. The saw blade according to claim 1 including a plurality of gullets, shoulders, tooth pockets, and teeth.

5. The saw blade according to claim 4, wherein between adjacent gullets, a circumferential size ratio exists between the shoulder circumferential width and gullet circumferential width of about 2:

1.

6. The saw blade according to claim 1, wherein an expansion slot is connected with said gullet, said expansion slot having a neck and an ellipsoidal or oval shaped body.

7. The saw blade according to claim 1, wherein said saw blade is a wood cutting blade.

8. The saw blade according to claim 1, wherein said gullet extends below said tooth, said bottom being at a distance from the blade center of about eighty to ninety-five (80-95%) percent of the radius of the blade.

9. The saw blade according to claim 1, wherein said bottom is at a distance at about ninety (90%) percent of the radius of the blade.

10. The saw blade according to claim 1, wherein said tooth is soldered or brazed onto said blade.

11. The saw blade according to claim 1, wherein said tooth is a carbide tooth secured to said blade.

12. The saw blade according to claim 1, wherein said tooth and blade are non-unitary elements.