Cutting tool with grooved cutting edge

• US 7,017,465 B2
• Filed: 07/29/2002
• Issued: 03/28/2006
• Est. Priority Date: 07/29/2002
• Status: Active Grant

• Current Assignee: LS Starrett Company
• Original Assignee: LS Starrett Company
• Inventors: Dion, Paul Armand, Caron, John Thomas
• Primary Examiner(s): PANG, ROGER L
• Application Number:
  US10/207,415
• Publication Number:
  US 20040016328A1
• Time in Patent Office: 1,338 Days
• Field of Search: 838/35, 838/36, 838/37, 838/38, 838/39, 838/40, 838/41, 838/42, 838/43, 838/44, 838/45, 838/46, 838/47, 838/48, 838/49, 838/50, 838/51, 838/52, 838/53, 838/54, 838/55, 761/12
• US Class Current: 83/835
• CPC Class Codes: B23D 61/12 Straight saw blades; Strap saw blades
• 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: Y10T 83/04 Processes
• CPC Class Codes: Y10T 83/9319 Toothed blade or tooth therefor
• CPC Class Codes: Y10T 83/9324 With additional cutting means

Abstract

A cutting tool includes a base made of metal having a plurality to cutting teeth along an edge of the base, wherein at least one cutting tooth has at least one notch in the cutting edge of the at least one cutting tooth. A tool is prepared by introducing a notch running longitudinally along the length of the tool in the cutting edge of the cutting teeth.

Claims

1. A cutting tool, comprising:

a metal base having a plurality of machined cutting teeth along an edge of the base,

wherein at least one cutting tooth is a composite cutting tooth comprised of a first erodible metal member flanked on opposing sides by second harder metal members, the first metal member tapering from a first wider width at a lower portion of the cutting tooth to a second narrower width at a cutting edge of the cutting tooth, and

wherein the first erodible metal is selected to preferentially erode at the cutting edge during use.

2. The cutting tool of claim 1, wherein a groove is introduced into the cutting edge of the cutting tooth during use by preferential erosion.

3. The cutting tool of claim 2, wherein the groove occupies about 5–

55% of the width of the cutting edge.

4. The cutting tool of claim 1, wherein said first wider width is substantially the same as the width of the base.

5. The cutting tool of claim 1, wherein the second metal members are tapered and have a taper complementary to the taper of the first erodible metal member.

6. The cutting tool of claim 1, wherein the taper is linear.

7. The cutting tool of claim 1, wherein the taper is curved.

8. The cutting tool of claim 1, wherein the first soft metal member is integral with and extending from the base.

9. The cutting tool of claim 1, wherein contains two or more erodible metal members.

10. The cutting tool of claim 1, wherein the second harder metal comprises a high speed steel.

11. The cutting tool of claim 1, wherein the cutting tool is selected from the group consisting of hand or powered hacksaw blades, band saw blades, reciprocating blades, jigsaw blades, and hole saw blades.

12. The cutting tool of claim 1, wherein the cutting teeth are welded onto the edge of the base.

13. The cutting tool of claim 12, wherein the cutting teeth are electron beam or laser welded to the edge of the base.

14. The cutting tool of claim 1, wherein a metallurgical bond joins the first erodible metal element and the second harder metal elements.