Saw blade

• US 4,813,324 A
• Filed: 11/25/1987
• Issued: 03/21/1989
• Est. Priority Date: 04/03/1985
• Status: Expired due to Term

• Current Assignee: Amada Company Limited
• Original Assignee: Amada Company Limited
• Inventors: Tsujimoto, Susumu, Kawabata, Katsuhiko, Yoshida, Sumio, Takegawa, Yoshikazu
• Primary Examiner(s): Yost, Frank T.
• Assistant Examiner(s): Smith, Scott A.
• Application Number:
  US07/125,588
• Time in Patent Office: 482 Days
• Field of Search: 83/847, 83/848, 83/849, 83/850, 83/851
• 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 83/9319 Toothed blade or tooth therefor
• CPC Class Codes: Y10T 83/935 Plural tooth groups
• CPC Class Codes: Y10T 83/9353 Including raker tooth group
• CPC Class Codes: Y10T 83/9355 Including intermediate raker tooth
• CPC Class Codes: Y10T 83/9358 Series of dissimilar teeth

Abstract

A saw blade such as a bandsaw blade, circular saw blade, or hacksaw blade has a leading tooth or teeth which cuts the workpiece and advances in a feed direction while the workpiece is being cut and a plurality of trailing teeth which cut the workpiece later than the leading tooth or teeth and serve to widen the leading cut channel. The leading tooth and the trailing teeth form one group in which a plurality of the trailing teeth are lesser in height than the leading tooth and an additional plurality of the trailing tooth are equal in height to the leading tooth. The trailing teeth are set in the right and left directions with respect to the saw blade and the leading tooth is unset with respect to the saw blade. The lateral set of the plurality of trailing teeth having a lesser height is wider than the lateral set of the plurality of trailing teeth having the same height as the leading tooth. Embodiments are disclosed in which a second group of teeth alternate with the basic group of teeth on the saw blade.

Claims

1. A saw blade comprising:

a first group of teeth, said first group having an unset leading tooth of predetermined height, a first plurality of trailing teeth set in the lateral direction, and a second plurality of trailing teeth set in the lateral direction, the heights of the first plurality of trailing teeth being equal to the height of the leading tooth of the first group, and the height of the second plurality of trailing teeth being less than the height of the leading tooth of the first group, wherein the set in the lateral direction of said second plurality of less high trailing teeth of the first group is wider than the set in the lateral direction of the first plurality of higher trailing teeth of the first group, and wherein the second plurality of less high trailing teeth of the first group are not consecutively positioned on the saw blade.

2. The saw blade of claim 1 wherein the trailing teeth of said first group are alternately set in opposed lateral directions.

3. The saw blade of claim 2 wherein in said first group of teeth, one of said second plurality of trailing teeth having a height less than the height of the leading tooth is position on said saw blade immediately following said leading tooth.

4. The saw blade of claim 3 wherein, in said first group of teeth, another of said second plurality of trailing teeth having a height less than the height of the leading tooth is positioned on said saw blade as the last tooth in said first group.

5. The saw blade of claim 4 wherein, in said first group of teeth, the first plurality of trailing teeth having a height equal to the height of the leading tooth are positioned on said saw blade between the one of the first plurality of trailing teeth of lesser height immediately following the leading tooth and the other of the second plurality of trailing teeth of lesser height positioned as the last tooth of the first group of teeth.

6. The saw blade of claim 5 wherein said first group of teeth has a total of five teeth.

7. The saw blade of claim 1 further comprising:

a second group of teeth having an unset leading tooth and a plurality of trailing teeth set in the lateral direction.

8. The saw blade of claim 7 wherein the trailing teeth of said first group are alternately set in opposed lateral directions.

9. The saw blade of claim 8 wherein in said first group of teeth, one of said second plurality of trailing teeth having a height less than the height of the leading tooth is positioned on said saw blade immediately following said leading tooth.

10. The saw blade of claim 9 wherein, in said first group of teeth, another of said second plurality of trailing teeth having a height less than the height of the leading tooth is positioned on said saw blade as the last tooth in said first group.

11. The saw blade of claim 10 wherein, in said first group of teeth, the first plurality of trailing teeth having a height equal to the height of the leading tooth are positioned on said saw blade between the one of the first plurality of trailing teeth of lesser height immediately following the leading tooth and the other of the second plurality of trailing teeth of lesser height positioned as the last tooth of the first group of teeth.

12. The saw blade of claim 11 wherein said first group of teeth has a total of five teeth.

13. The saw blade of claim 7 wherein, in said second group of teeth, a plurality of trailing teeth have a height which is less than the height of the leading tooth of the second group of teeth.

14. The saw blade of claim 13 wherein the leading tooth of the first group and the leading tooth of the second group are equal in height.

15. The saw blade of claim 14 wherein a plurality of trailing teeth of the second group have a height which is equal to the lesser height of the trailing teeth of the first group.

16. The saw blade of claim 15 wherein said second group of teeth has a total of three teeth.

17. The saw blade of claim 15 wherein, in said second group, an additional plurality of trailing teeth ave a height which is equal to the height of the leading teeth of the first and second group of teeth.

18. The saw blade of claim 17 wherein said second group of teeth has a total of seven teeth.

19. The saw blade of claim 7 in which said first group of teeth and said second group of teeth are positioned on said saw blade to form a pattern in which said first group and said second group alternate along the length of said saw blade.