Curved saw

• US 20050229407A1
• Filed: 07/14/2004
• Published: 10/20/2005
• Est. Priority Date: 04/15/2004
• Status: Abandoned Application

• Current Assignee: Kanzawa Seiko Company Limited
• Original Assignee: Kanzawa Seiko Company Limited
• Inventors: Kanzawa, Kuniyuki
• Application Number:
  US10/891,204
• Publication Number:
  US 20050229407A1
• Time in Patent Office: Days
• US Class Current: 30/355
• CPC Class Codes: B23D 61/12 Straight saw blades; Strap saw blades
• 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

Abstract

A curved saw having a saw blade 1 curved from the back end to the front end. A multitude of saw teeth 2 are formed on the concave edge of the curved saw blade 1 in such a way that angles α of tooth flanks 3 near the back end of the saw blade 1 with respect to the edge line 5, which connects the tooth tips 4 of the saw teeth, are relatively larger than angles α of tooth flanks 3 near the front end of the saw blade 1 with respect to the edge line 5.

Claims

1. A curved saw having a curved saw blade that curves from its back end to its front end with a multitude of saw teeth formed on its concave edge, wherein angles of tooth flanks near the back end of the saw blade with respect to an edge line, which connects tooth tips of the saw teeth, are larger than angles of tooth flanks near the front end of the saw blade with respect to the edge line.

2. The curved saw according to claim 1, wherein angles of tooth flanks formed on the concave edge decrease progressively from the largest at the back end of the saw blade to the smallest at the front end of the saw blade.

3. The curved saw according to claim 1, wherein the teeth arranged on the concave edge from the back end to the front end of the saw blade are divided into several sections, and angles of tooth flanks with respect to the edge line, which connects the tooth tips of the saw teeth, are varied from one section to another.