Saw blade and method of making the same

• US 5,231,909 A
• Filed: 12/13/1991
• Issued: 08/03/1993
• Est. Priority Date: 12/16/1991
• Status: Expired due to Fees

• Current Assignee: An-Sun Hsu
• Original Assignee: An-Sun Hsu
• Inventors: Hsu, An-Sun
• Primary Examiner(s): JONES, EUGENIA A
• Application Number:
  US07/807,113
• Time in Patent Office: 599 Days
• Field of Search: 83/835, 83/846, 83/848, 83/851, 83/852
• US Class Current: 83/835
• 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: B23D 61/123 Details of saw blade body
• CPC Class Codes: B23D 63/12 by grinding
• CPC Class Codes: B23D 65/00 Making tools for sawing machines or sawing devices for use in cutting any kind of material
• CPC Class Codes: Y10T 83/9319 Toothed blade or tooth therefor
• CPC Class Codes: Y10T 83/935 Plural tooth groups
• CPC Class Codes: Y10T 83/936 Series of allochiral teeth

Abstract

A saw blade includes the: (1) provision of a trapezial tooth between every two triangular teeth, the trapezial tooth having two opposite sides which extend towards one another at a top end, a distal bottom end opposite the top end and two opposite trapezial faces; (2) provision of cutting edges by forming two inclined faces which converge from one of the trapezial faces towards the other one of the trapezial faces; (3) provision of a cut at a rear one of the inclined faces which cut forms an inverted "L" shape that extends vertically to a predetermined height from the distal bottom end; and (4) the grinding of the distal bottom end to form a triangular tip face which extends inclinedly from a front section to a rear section of the trapezoid tooth.

Claims

1. A saw blade comprising:

an elongated metal blade having a first side, a second side opposite to said first side, front end, a rear end opposite to said front end, a longitudinal top edge and a longitudinal bottom edge;

a plurality of sets of teeth being formed along said longitudinal bottom edge, each of said sets of teeth including a first, second and third tooth located in succession, said first tooth having an apex, front and rear inclined first faces formed on said first side of said metal blade which converge from said second side toward said first side of said metal blade, said front inclined first face being nearer to said front end of said metal blade than said rear inclined first face, said apex of said first tooth having a first triangular tip face that extends toward said bottom edge and rearwards from said front inclined first face towards said rear inclined first face and from said second side towards said first side of said first tooth, said second tooth having an apex, front and rear inclined second faces formed on said second side of said metal blade which converge from said first side toward said second side of said metal blade, said apex of said second tooth being round thereby forming a second triangular tip face that extends toward said bottom edge and rearwards from said front inclined second face towards said rear inclined second face and from said first side toward said second side of said second tooth;

a third tooth having an apex, front and rear inclined third faces formed on one of said first and second sides, portions of said front and rear inclined third faces meeting on one of said first and second sides, said front inclined third face being nearer to said front end of said metal blade than said rear inclined third face, an inverted L-shaped cut being formed on said rear inclined third face of said third tooth such that with said longitudinal top edge of said metal blade being held upward, said cut vertically extending from said apex to a predetermined height, said apex of said third tooth being ground such that said third tooth has a third triangular tip face that extends toward said bottom edge and rearwards from said front inclined third face toward said rear inclined third face of said third tooth to form a horizontal edge transverse to a longitudinal length of said metal blade when said third tooth is viewed from the rear end of said metal blade.

2. A saw blade as claimed in claim 1, wherein a cross-section taken adjacent to said third triangular tip face of said third tooth is greater than that of said first and second triangular tip faces of said first and second teeth taken at he corresponding section adjacent to said first and second triangular tip faces of said first and second teeth.