Saw blade

• US 20040182218A1
• Filed: 03/21/2003
• Published: 09/23/2004
• Est. Priority Date: 03/21/2003
• Status: Abandoned Application

• Current Assignee: Walley Chao
• Original Assignee: Walley Chao
• Inventors: Chao, Walley
• Application Number:
  US10/393,260
• Publication Number:
  US 20040182218A1
• Time in Patent Office: Days
• US Class Current: 83/848
• 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 83/935 Plural tooth groups

Abstract

A saw blade includes a base body and a plurality of groups of saw teeth. Each group of saw teeth is provided with a first section and a second section, wherein the first and second sections are adjacently positioned and respectively include a plurality of pre-cutting saw teeth, each of which has a first clearance angle, and re-cutting saw teeth, each of which has a second clearance angle. The pitch between each two saw teeth is the same with the others, but the first clearance angle of the pre-cutting saw teeth and the second clearance angle of the re-cutting saw teeth are different from each other.

Claims

1. A saw blade comprising:

a base body; and

a plurality of groups of saw teeth positioned at a side of said base body, each group of said saw teeth including a first section and a second section, said first and second sections being successively positioned and respectively having a plurality of pre-cutting saw teeth and re-cutting saw teeth, each of said pre-cutting saw teeth having a first clearance angle, each of said re-cutting saw teeth having a second clearance angle, said first clearance angle being different from said second clearance angle.

2. The saw blade as defined in claim 1, wherein each of said pre-cutting saw teeth is lower than each of said re-cutting saw teeth in height.

3. The saw blade as defined in claim 2, wherein the proportion of the height of each said pre-cutting saw tooth to the height of each said re-cutting saw tooth is 0.71:

0.73.

4. The saw blade as defined in claim 1, wherein said first clearance angle is smaller than said second clearance angle.

5. The saw blade as defined in claim 1, wherein the length of said first section is shorter than that of said second section.

6. The saw blade as defined in claim 5, wherein the proportion of the length of said first section to said second section is 1:

2.5.

7. The saw blade as defined in claim 1, wherein a pre-cutting tooth gap is defined between each two said pre-cutting teeth and the pre-cutting tooth gap has a smaller radius than the height of each said pre-cutting saw tooth, and the height of said each said pre-cutting saw tooth is smaller than the pitch between each two said pre-cutting saw teeth.

8. The saw blade as defined in claim 7, wherein the proportion of the radius of each said pre-cutting tooth gap to the pitch between each two said pre-cutting saw teeth to the height of each said pre-cutting saw tooth is 0.37:

1.41;

0.71.

9. The saw blade as defined in claim 1, wherein a re-cutting tooth gap is defined between each said re-cutting tooth and the re-cutting tooth gap has a smaller radius than the height of each said re-cutting saw tooth, and the height of said each said re-cutting saw tooth is smaller than the pitch between each two said re-cutting saw teeth.

10. The saw blade as defined in claim 9, wherein the proportion of the radius of each said re-cutting tooth gap to the pitch between each said two re-cutting saw teeth to the height of each said re-cutting saw tooth is 0.33:

1.41;

0.73.