Saw blade

• US 6,439,094 B1
• Filed: 05/13/1998
• Issued: 08/27/2002
• Est. Priority Date: 05/15/1997
• Status: Expired due to Term

• Current Assignee: Amada Company Limited
• Original Assignee: Amada Company Limited
• Inventors: Yoneda, Akiyoshi, Tsujimoto, Susumu
• Primary Examiner(s): Vo, Peter
• Assistant Examiner(s): TRINH, MINH N
• Application Number:
  US09/076,889
• Time in Patent Office: 1,567 Days
• Field of Search: 838/35, 838/50, 838/51, 838/47, 838/48, 838/46, 838/66, 838/52, 838/55, 761/12, 76/251, 76/29
• US Class Current: 83/835
• 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 83/9346 Uniformly varying teeth or tooth spacing
• CPC Class Codes: Y10T 83/9358 Series of dissimilar teeth
• CPC Class Codes: Y10T 83/9367 Teeth having cutting edge perpendicular to blade surface

Abstract

A saw blade is constituted with a unset tooth, a plurality of left-set teeth and a plurality of right-set teeth. In the construction, the saw blade has the unset tooth, a plurality of left-set teeth and a plurality of right-set teeth as one group. A plurality of set widths of the plurality of set teeth are formed in the saw blade. A relief angle of a tip of the unset tooth is equal to or greater than a relief angle of a tip of the set tooth having the smallest set width. Furthermore, the relief angle of a tip becomes small in accordance that the set width becomes greater.

Claims

1. A band saw blade, comprising:

at least one unset tooth;

at least a first left set tooth which has a smallest set width;

at least a second right set tooth which has a smallest set width;

at least a third left set tooth which has a larger set width than the set width of the first left set tooth; and

at least a fourth right set tooth which has a larger set width than the set width of the second right set tooth,

wherein when a relief angle of a tip of the unset tooth is set to be α

A, when a relief angle of a tip of each first left set tooth and second right set tooth is set to be α

B, and when a relief angle of a tip of each third left set tooth and fourth right set tooth is set to be α

C, a relation α

A>

α

B>

α

C is achieved, and

wherein α

A is 33-37 degrees, α

B is 30-35 degrees, and α

C is 23-32 degrees.