All purpose saw blade

• US 5,697,280 A
• Filed: 01/31/1996
• Issued: 12/16/1997
• Est. Priority Date: 09/27/1994
• Status: Expired due to Fees

• Current Assignee: Armstrong-Blum Manufacturing Company
• Original Assignee: Armstrong-Blum Manufacturing Company
• Inventors: Okada, Kunihiko, Yoneda, Akiyoshi, Armstrong, Donald L.
• Primary Examiner(s): Rachuba, Maurina T.
• Application Number:
  US08/594,843
• Time in Patent Office: 685 Days
• Field of Search: 83/835, 83/836, 83/838, 83/844, 83/848, 83/849, 83/850, 83/851, 83/852, 83/661
• US Class Current: 83/848
• 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 83/935 Plural tooth groups
• CPC Class Codes: Y10T 83/9358 Series of dissimilar teeth
• CPC Class Codes: Y10T 83/936 Series of allochiral teeth

Abstract

To provide a general-purpose saw blade which will saw different materials cost effectively, the saw blade includes a plurality of sets of teeth, each set including saw tooth having a large relief angle and a small tooth angle which provide fast cutting speeds, and with saw tooth having a small relief angle and a large tooth angle which provide the resistance to chipping.

Claims

1. In a saw blade,

a set of teeth, said set of teeth including

a first sub-set which includes a straight tooth,

a second sub-set which includes at least one left-angled tooth and one right-angled tooth,

a third sub-set which includes at least one of a left-angled tooth and a right-angled tooth,

a fourth sub-set which includes a straight tooth,

a fifth sub-set which includes at least one left-angled tooth and one right-angled tooth,

a sixth sub-set which includes at least one of a left-angled tooth and a right-angled tooth,

heights of all the teeth being substantially the same, and the relief angles of the teeth in the second sub-set and the fifth sub-set, which are substantially the same being smaller than the relief angles of the teeth in either the first, third, fourth, sixth sub-sets.

2. The saw blade of claim 1, wherein the relief angles of the first, third, fourth, and sixth sub-sets are all substantially the same.

3. In a saw blade,

a set of teeth, said set of teeth including

a first sub-set which includes a straight tooth,

a second sub-set which includes at least one left-angled tooth and one right-angled tooth,

a third sub-set which includes at least one left-angled tooth or one right-angled tooth,

heights of all the teeth being substantially the same, and the relief angles of the teeth in the second sub-set being smaller than the relief angles of the teeth in the first and third sub-sets.

4. The saw blade of claim 3, wherein the relief angle of the teeth in the first sub-set is substantially equal to the relief angle of the teeth in the third sub-set.

5. In a saw blade,

a set of teeth, said set of teeth including

a first sub-set which includes a straight tooth,

a second sub-set which includes at least one left-angled tooth and one right-angled tooth,

a third sub-set which includes at least one left-angled tooth or one right-angled tooth,

wherein the sub-sets are arranged in the order of first sub-set, second sub-set, and then third sub-set, and the relief angles of the teeth in the second sub-set is smaller than the relief angles of the teeth in the first and third sub-sets.