Sawblade having unequal spacing between identical tooth groups

• US 6,119,571 A
• Filed: 04/10/1998
• Issued: 09/19/2000
• Est. Priority Date: 04/10/1998
• Status: Expired due to Fees

• Current Assignee: Sandvik AB
• Original Assignee: Sandvik AB
• Inventors: Hayden, Robert C. Sr.
• Primary Examiner(s): Peterson, Kenneth E.
• Application Number:
  US09/058,358
• Time in Patent Office: 893 Days
• Field of Search: 83/661, 83/848, 83/851, 83/852, 83/846, 83/838, 83/835, 83/849, 83/850
• 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 83/935 Plural tooth groups

Abstract

A bandsaw blade includes recurring identical groups of teeth. Each tooth group consists of two to six teeth. Each group is spaced from leading and trailing groups by first and second respective distances. The first and second distances being different from one another.

Claims

1. A bandsaw blade comprising recurring groups of teeth, the teeth configured to cut in only one direction of blade travel, each group consisting of three to six teeth, the recurring groups being identical as to tooth size, tooth shape and tooth spacing within the group, a leading tooth of each group being spaced from a trailing tooth of a preceding group by a first distance, a trailing tooth of each group being spaced from a leading tooth of a following group by a second distance, the first and second distances being different from one another, the successive teeth of each group being separated by a gullet, and each pair of successive groups being separated by a gullet, all gullets of the blade being of substantially uniform depth.

2. The bandsaw blade according to claim 1 wherein each group of teeth defines an average pitch distance between the teeth, the average pitch distance being equal for all of the groups, the distances between successive groups being non-multiples of the average pitch distance.

3. The bandsaw blade according to claim 1 wherein a longest distance between successive groups is less than two times a shortest distance between successive groups.

4. The bandsaw blade according to claim 3 wherein each pair of successive groups is separated by a gullet having a flat portion whose length is at least equal to a difference between a longest and a shortest of those distances.

5. The bandsaw blade according to claim 1, wherein the distances between the groups are of random length.