Tooth structure for burr-free cutting saw blade

• US 4,137,808 A
• Filed: 12/02/1977
• Issued: 02/06/1979
• Est. Priority Date: 12/29/1976
• Status: Expired due to Term

• Current Assignee: Georg Fischer
• Original Assignee: Georg Fischer
• Inventors: Mattes, Lothar
• Primary Examiner(s): Yost, Frank T.
• Application Number:
  US05/856,973
• Time in Patent Office: 431 Days
• Field of Search: 83/835, 83/851, 83/855, 83/849, 83/850
• US Class Current: 83/851
• 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: 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 83/9358 Series of dissimilar teeth

Abstract

A saw blade has teeth formed with cutting edges which are inclined relative to the side surfaces and which extend only partly across the blade width, the cutting edges of successive ones of the teeth extending transversely inwardly from opposite side surfaces of the blade.

Claims

1. A saw blade for burr-free cutting of materials, the blade being of the type having generally planar side surfaces lying in substantially parallel planes and a plurality of cutting teeth along one edge thereof, said blade having a predetermined cutting direction parallel with said side surfaces, the improvement wherein

each of said teeth includes

a cutting edge extending transversely across only a predetermined portion of the distal end of the tooth from one of said side surface planes to a point between said planes, said cutting edge lying along a line which is inclined relative to a line extending perpendicularly between the planes of said side surfaces, and

an inclined generally triangular surface extending from said point to the other of said side surface planes,

and wherein, in a first set of blade teeth including every other tooth, the cutting edges extend inwardly from one of said planes and, in a second set of teeth including the remaining teeth the cutting edges extend inwardly from the other one of said planes.

2. A saw blade according to claim 1 wherein the distance between said point and said one of said planes in said first set of teeth is greater than the distance between said point and the other one of said planes in said second set of teeth.

3. A saw blade according to claim 1 wherein the angle of inclination of said triangular surfaces in the teeth of said first set is different from the angle of inclination of said surfaces in said second set.

4. A saw blade according to claim 1 wherein the line in which said cutting edge lies in substantially perpendicular to the direction of cutting motion of said teeth.