Saw blade

• US 6,220,139 B1
• Filed: 09/08/1997
• Issued: 04/24/2001
• Est. Priority Date: 03/08/1995
• Status: Expired due to Fees

• Current Assignee: Amada Company Limited
• Original Assignee: Amada Company Limited
• Inventors: Kobayashi, Mitsuo, Horiguchi, Katsuhiro, Tokuoka, Kousuke
• Primary Examiner(s): Rachuba, M.
• Application Number:
  US08/913,001
• Time in Patent Office: 1,324 Days
• Field of Search: 838/35, 838/46, 838/48--62, 836/61, 761/12
• 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 65/02 Making saw teeth by punching, cutting, or planing
• 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 83/935 Plural tooth groups
• CPC Class Codes: Y10T 83/9358 Series of dissimilar teeth
• CPC Class Codes: Y10T 83/936 Series of allochiral teeth

Abstract

A saw blade 1 comprises a preceding tooth 5 constructed by a straight tooth performing no saw setting operation in left-hand and right-hand directions and a succeeding tooth 7 for cutting a cutting groove formed by the above preceding tooth 5 to enlarge and open the cutting groove in width. The succeeding tooth 7 has left-hand and right-hand set teeth 7L, 7R bent in the left-hand and right-hand directions by splitting an approximately central portion 7D of a tooth edge on a tooth line in its thickness direction; and the clearance between end tip insides of the above left-hand and right-hand set teeth 7L, 7R is smaller than the thickness of the preceding tooth 5. Further, the thickness of portions of the left-hand and right-hand set teeth 7L, 7R near their end tip portions are approximately equal to the thickness of portions of the left-hand and right-hand set teeth near respective base portions thereof.

Claims

1. A saw blade comprising:

a preceding tooth constructed of a straight tooth that is not set in left-hand and right-hand directions, and

a succeeding tooth for cutiting a cutting groove formed by the preceding tooth to enlarge the cutting groove in width,

wherein the succeeding tooth comprises left-hand and right-hand set teeth bent in the left-hand and right-hand directions from a split in an approximately central portion of a tooth upper surface and adjacent cutting edge opening in a tooth thickness direction, wherein a clearance between end tip insides of the left-hand and right-hand set teeth is smaller than the thickness of the preceding tooth.

2. The saw blade as recited in claim 1, wherein the thickness of portions of the left-hand and right-hand set teeth near their end tip portions are approximately equal to the thickness of portions of the left-hand and right-hand set teeth near respective base portions thereof.

3. The saw blade as recited in claim 1, wherein plural succeeding teeth are formed such that a projecting amount of each of the succeeding teeth is increased as each of heights of the succeeding teeth is decreased.

4. The saw blade as recited in claim 1, wherein T/2−

0.1 mm≦

A≦

T/2+0.1 mm is satisfied when A is a size of a parting position of said succeeding tooth, and T is a body thickness of the succeeding tooth.

5. The saw blade as recited in claim 1, wherein it includes succeeding teeth satisfying β

L>

0° and

β

R>

0°

when β

L and β

R are respectively inclination angles of the left-hand and right-hand set teeth in said succeeding tooth on a tooth line.

6. The saw blade as recited in claim 1, wherein 20°

≦

θ

≦

90°

is satisfied when θ

is a parting angle in said succeeding tooth.

7. The saw blade as recited in claim 2, wherein plural succeeding teeth are formed such that a projecting amount of each of the succeeding teeth is increased as each of heights of the succeeding teeth is decreased.

8. The saw blade as recited in claim 2, wherein T/2−

0.1 mm≦

A≦

T/2+0.1 mm is satisfied when A is a size of a parting position of said succeeding tooth, and T is a body thickness of the succeeding tooth.

9. The saw blade as recited in claim 3 wherein T/2−

0.1 mm≦

A≦

T/2+0.1 mm is satisfied when A is a size of a parting position of said succeeding tooth, and T is a body thickness of the succeeding tooth.

10. The saw blade as recited in claim 2, wherein it includes succeeding teeth satisfying β

L>

0° and

β

R>

0°

when β

L and β

R are respectively inclination angles of the left-hand and right-hand set teeth in said succeeding tooth on a tooth line.

11. The saw blade as recited in claim 3, wherein it includes succeeding teeth satisfying β

L>

0° and

β

R>

0°

when β

L and β

R are respectively inclination angles of the left-hand and right-hand set teeth in said succeeding tooth on a tooth line.

12. The saw blade as recited in claim 4, wherein it includes succeeding teeth satisfying β

L>

0° and

β

R>

0°

when β

L and β

R are respectively inclination angles of the left-hand and right-hand set teeth in said succeeding tooth on a tooth line.

13. The saw blade as recited in claim 2, wherein 20°

≦

θ

≦

90°

is satisfied when θ

is a parting angle in said succeeding tooth.

14. The saw blade as recited in claim 3, wherein 20°

≦

θ

≦

90°

satisfied when θ

is a parting angle in said succeeding tooth.

15. The saw blade as recited in claim 4, wherein 20°

≦

θ

≦

90°

is satisfied when θ

is a parting angle in said succeeding tooth.

16. The saw blade as recited in claim 5, wherein 20°

≦

θ

≦

90°

is satisfied when θ

is a parting angle in said succeeding tooth.