Saw blade

• US 5,855,157 A
• Filed: 06/12/1997
• Issued: 01/05/1999
• Est. Priority Date: 12/21/1994
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Works Ltd (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Works Ltd (Panasonic Holdings Corporation)
• Inventors: Fuwa, Isao, Ohtani, Ryuji, Ikegami, Masahiro, Kusano, Noboru, Okamura, Hidezumi, Torigoe, Masao, Hongo, Shoichi
• Primary Examiner(s): RACHUBA, MAURINA T
• Application Number:
  US08/873,560
• Time in Patent Office: 572 Days
• Field of Search: 83/830, 83/832-839, 83/845, 83/846, 83/853-855, 407/117, 407/113
• US Class Current: 83/830
• 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 83/909 Cutter assemblage or cutter element therefor [e.g., chain saw chain]
• CPC Class Codes: Y10T 83/917 Having diverse cutting elements
• CPC Class Codes: Y10T 83/9319 Toothed blade or tooth therefor
• CPC Class Codes: Y10T 83/9326 Plural separable sections
• CPC Class Codes: Y10T 83/9367 Teeth having cutting edge perpendicular to blade surface

Abstract

A saw blade preventing "fluff" or "return" of fibers from occurring when used to cut wood or the like object and rendering any finishing work unnecessary is formed with a unique combination of cutting teeth and biting teeth, the biting teeth being disposed, on a cut path mainly by means of the cutting teeth, either on top surface of or in front of each cutting tooth in cutting direction of the saw blade and to have a smaller width than the cutting teeth, for realizing a biting operation by the biting teeth and the cutting operation by the cutting teeth in the same sawing step.

Claims

1. A saw blade comprising:

a base body having a cutting side with a plurality of tip mounting notches formed therein at constantly spaced intervals;

a plurality of tips connected to the base body such that one of said plurality of tips is mounted in a corresponding one of the tip mounting notches;

a plurality of cutting teeth formed in the tips such each tip includes one of said plurality of cutting teeth;

said cutting teeth being arranged to have a cutting direction for forming a cutting path in a workpiece, each of said cutting teeth including;

a pair of side edges;

a pair of biting teeth disposed adjacent the side edges;

a blade edge extending between outer side comers of the pair of biting teeth and arranged to face in the cutting direction, the blade edge having a central portion that is retracted opposite from the cutting direction;

a chip relief edge provided on a front side surface of each cutting tooth facing toward the cutting direction and extending up to a position intermediate the height of the cutting tooth and projecting in the cutting direction, the chip releasing edge being formed in a triangular pyramid shape, the chip releasing edge having a top end which is positioned below a bottom point of retraction of the blade edge in the cutting direction.

2. The saw blade according to claim 1 wherein each of the tip mounting notches includes a lower groove formed at a front lower portion thereof to provide a gap between a front face of each tip and a front side wall of the tip mounting notch with each tip being mounted in a rear portion of the corresponding tip mounting notch, wherein the tips are provided in two types that have different lateral chip strip-off angles between the pair of biting teeth, with the retracted portion of the blade edges of adjacent tips having a bottom region deviated laterally from the center of the blade toward opposite sides thereof, wherein the two types of tips differ in sloped angle where lower rear comers of the tips are mounted to rear a portion of the tip mounting notches, and wherein the tip mounting notches are also provided in two types mutually different in sloped angle at the rear portion, said two types of tip mounting notches being provided alternately in the base body to have the two types of tips alternately mounted to the two types of notches.