Saw blade

• US 5,477,763 A
• Filed: 12/27/1993
• Issued: 12/26/1995
• Est. Priority Date: 01/12/1993
• Status: Expired due to Term

• Current Assignee: Wikus-Saegenfabrik Wilhelm H. Kullmann GmbH & Co. Kg
• Original Assignee: Wilhelm H. Kullmann Wikus-Sagenfabrik
• Inventors: Kullman, Jorg H.
• Primary Examiner(s): Rada, Rinaldi I.
• Assistant Examiner(s): WOODS, RAYMOND
• Application Number:
  US08/173,562
• Time in Patent Office: 729 Days
• Field of Search: 83/846, 83/847, 83/848, 83/849, 83/850, 83/851, 83/676
• US Class Current: 83/846
• CPC Class Codes: B23D 61/021 Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet
• CPC Class Codes: Y10T 83/9346 Uniformly varying teeth or tooth spacing
• CPC Class Codes: Y10T 83/9355 Including intermediate raker tooth
• CPC Class Codes: Y10T 83/9358 Series of dissimilar teeth

Abstract

A saw blade including a basic body (1) with a plurality of unset teeth along the edge of the basic body, each tooth having a cutting edge. The teeth are provided in recurring cycles on the saw blade. Each recurring cycle has at least one group of teeth (2) comprised of at least two teeth therein, the teeth being formed symmetrically with respect to a longitudinal center plane (8) along which the basic body lies. At least two groups of teeth (2_n, 2*) are provided in the recurring cycle, where the teeth of the second group are interspersed among the teeth of the first group within the recurring cycle of teeth. The teeth in the first group of teeth progressively decrease in height and increase in width from tooth to tooth. whereas the teeth of the second group of teeth are each formed identically, each tooth of the second group of teeth being wider than any one tooth of the first group of teeth.

Claims

1. A saw blade, comprising:

a flat basic body formed symmetrically about a longitudinal center plane, said body having an elongated edge portion;

a plurality of spaced teeth formed along said edge portion of said body, said teeth being spaced from each other along the edge portion of said body in at least one recurring cycle of teeth;

wherein said at least one recurring cycle of teeth includes a first group of teeth and a second group of teeth, said first and second groups of teeth each having at least two teeth therein, the teeth of said first group of teeth progressively decreasing in height and increasing in width from tooth to tooth therein, the teeth of said second group of teeth being substantially identical in size and shape with respect to each other therein; and

wherein the teeth of said second group of teeth are alternatingly interspersed among the teeth of said first group of teeth within said at least one recurring cycle of teeth.

2. The saw blade of claim 1, wherein each of said teeth comprises a cutting edge, said cutting edge of each tooth being formed as an inflected cutting edge formed at an angle along said elongated edge portion and facing an anticipated direction of saw blade travel, said cutting edge of each tooth further comprising an effective cutting edge having a plurality of cutting edge sections.

3. The saw blade of claim 1, wherein said second group of teeth are wider than said basic body.

4. The saw blade of claim 1, wherein said second group of teeth are wider than any of the teeth from said first group of teeth.

5. The saw blade of claim 1, wherein each of said teeth extend symmetrically on opposite sides of the longitudinal center plane of said body.

6. The saw blade of claim 5, wherein each of said teeth comprises:

a cutting edge which extends approximately at a right angle with respect to the longitudinal center plane of said body;

adjoining phases extending to opposite sides of said cutting edge, said phases being inclined toward said basic body;

flanks which extend from said adjoining phases toward the basic body to form the tooth;

a phase angle formed with respect to the cutting edge and one of the phases of said tooth; and

a flank angle formed with respect to one of the flanks of said tooth and a line parallel to the longitudinal center plane of said basic body.

7. The saw blade of claim 6, wherein another angle is formed with respect to one of the phases and the flank of the tooth facing outwardly of the tooth, wherein said other angle within the teeth of said second group of teeth is greater than ninety degrees.

8. The saw blade of claim 6, wherein said share angles of the teeth of said first and second groups of teeth are identical.

9. The saw blade of claim 6, wherein said flank angles of the teeth in said second group of teeth range from three degrees to twelve degrees.

10. The saw blade of claim 9, wherein said flank angles are eight degrees.

11. The saw blade of claim 6, wherein the teeth of said second group of teeth further comprise a rounded corner where said cutting edge and each of said phases adjoin one another.

12. The saw blade of claim 1, wherein each of said teeth comprises a ground metal tooth.

13. The saw blade of claim 1, wherein there is at least one tooth from said second group of teeth interspersed between each two adjacent teeth of said first group of teeth.

14. The saw blade of claim 1, wherein there is a constant tooth pitch between each tooth within said at least one recurring cycle of teeth.

15. The saw blade of claim 1, wherein there is a recurring variable tooth pitch between each tooth within said at least one recurring cycle of teeth forming a third group of teeth therein.

16. The saw blade of claim 15, wherein the number of teeth in said third group of teeth is not equal to the number of teeth in said first group of teeth and the number of teeth in said second group of teeth.

20. The saw blade of claim 14, wherein the number of teeth in said third group of teeth is not equal to the number of teeth in said first group of teeth and the number of teeth in said second group of teeth.

17. A saw blade, comprising:

a flat basic body formed symmetrically about a longitudinal center plane, said body defining an elongated edge portion thereon;

said elongated edge portion of said body including a plurality of teeth spaced from each other in at least one recurring cycle of teeth;

wherein said at least one recurring cycle of teeth includes a first group of teeth and a second group of teeth, said first and second groups of teeth each having at least two teeth therein, the teeth of said first group of teeth progressively decreasing in height and increasing in width from tooth to tooth therein, the teeth of said second group of teeth being substantially identically sized and shaped with respect to each other therein, the teeth of said second group of teeth also being wider than said basic body and wider and shorter than any one tooth from said first group of teeth; and

wherein the teeth of said second group of teeth are alternatingly interspersed among the teeth of said first group of teeth within said at least one recurring cycle of teeth.

18. The saw blade of claim 17, wherein there is a constant tooth pitch between each tooth within said at least one recurring cycle of teeth.

19. The saw blade of claim 17, wherein there is a recurring variable tooth pitch between each tooth within said at least one recurring cycle of teeth forming a third group of teeth therein.