Tooth arrangement in a metal cutting bandsaw

• US 6,269,722 B1
• Filed: 06/25/1998
• Issued: 08/07/2001
• Est. Priority Date: 06/26/1997
• Status: Expired due to Term

• Current Assignee: Kapman AB (Snap-On Incorporated)
• Original Assignee: Kapman AB (Snap-On Incorporated)
• Inventors: Hellbergh, Håkan
• Primary Examiner(s): Dexter, Clark F.
• Application Number:
  US09/104,391
• Time in Patent Office: 1,139 Days
• Field of Search: 836/61, 838/48, 838/49, 838/50, 838/51, 838/35, 838/46, 838/47, 838/52, 838/53, 838/54, 838/55, 761/12
• US Class Current: 83/661
• 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 83/9317 Endless band or belt type
• CPC Class Codes: Y10T 83/9348 Undulating tooth arrangement
• CPC Class Codes: Y10T 83/935 Plural tooth groups
• CPC Class Codes: Y10T 83/9358 Series of dissimilar teeth

Abstract

A metal cutting bandsaw blade includes a strip and a recurring group of teeth projecting therefrom. The recurring group of teeth has a setting pattern and a height pattern. The setting pattern has at least three units selected from the following setting types:

(a) unset teeth

(b) teeth set to the right

(c) teeth set to the left.

The setting pattern includes at least one of each of the setting types. The height pattern has at least two selected from the following height types:

(a) high teeth

(b) low teeth.

The height pattern includes at least one of each of the height types. The total number of teeth in the recurring group is the product of the number of setting units and the number of heights units. The number of setting units is incommensurable with the number of height units. The number of teeth set to the right in the recurring group is equal to the number of teeth set to the left. All of the set teeth in the group have substantially equal setting widths.

Claims

1. A metal cutting bandsaw blade comprising a strip and a recurring group of teeth projecting therefrom,

each group of teeth having setting subgroups and height subgroups, each setting subgroup comprising at least three setting units selected from the following setting types:

(a) unset teeth,

(b) teeth set to the right,

(c) teeth set to the left;

each setting subgroup defining a setting pattern and including at least one of each of the setting types, the setting pattern repeating itself at least once within the group;

each height subgroup comprising at least two height units selected from the following height types;

(a) high,

(b) low;

each height subgroup defining a height pattern and including at least one of each of the height types, the height pattern repeating itself at least once within the group, the high teeth being of substantially equal height, and the low teeth being of substantially equal height which is less than the height of the high teeth;

a total number of teeth in the recurring group being equal to the number of setting units multiplied by the number of height units, the number of setting units being incommensurable with the number of height units;

a number of teeth set to the right in the group being equal to a number of teeth set to the left in the group;

all of the set teeth in the setting subgroup having substantially equal setting widths.

2. The metal cutting bandsaw blade according to claim 1 wherein the recurring group has two height units and three setting units.

3. The metal cutting bandsaw blade according to claim 1 wherein a difference in height between the high teeth and the low teeth is in the range of 0.075 to 0.15 mm.

4. The metal cutting bandsaw blade according to claim 1 wherein a difference in height between the high teeth and the low teeth is about 0.1 mm.