Variable tooth saw blade
First Claim
Patent Images
1. A saw blade comprising:
- a flat, circular disc having a peripheral outer edge and a center hole;
a plurality of circumferentially-spaced teeth each having a substantially axially extending cutting edge and projecting radially outwardly from the peripheral outer edge;
a first group of the cutting edges defining a first circumferential width between each adjacent pair of the cutting edges in the first group;
a second group of the cutting edges defining a second circumferential width between each adjacent pair of the cutting edges in the second group;
the second circumferential width differing from the first circumferential width;
at least one of the first and second groups including at least three of the cutting edges; and
a third group of the cutting edges having at least one of the cutting edges defining a third circumferential width as one of the distance between adjacent cutting edges in the third group and, the distance between the at least one cutting edge in the third group and the adjacent cutting edge in the adjacent group;
the third circumferential width differing from the first and second circumferential widths.
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Accused Products
Abstract
An apparatus for cutting materials and more specifically an improved saw blade includes a plurality of variable teeth thereon. The variable tooth saw blade cuts faster and smoother while reducing harmonic vibrations. Specifically, the teeth on the saw blade are grouped into sections with differing circumferential widths and differing spacing between the sections.
38 Citations
44 Claims
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1. A saw blade comprising:
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a flat, circular disc having a peripheral outer edge and a center hole; a plurality of circumferentially-spaced teeth each having a substantially axially extending cutting edge and projecting radially outwardly from the peripheral outer edge; a first group of the cutting edges defining a first circumferential width between each adjacent pair of the cutting edges in the first group; a second group of the cutting edges defining a second circumferential width between each adjacent pair of the cutting edges in the second group;
the second circumferential width differing from the first circumferential width;at least one of the first and second groups including at least three of the cutting edges; and a third group of the cutting edges having at least one of the cutting edges defining a third circumferential width as one of the distance between adjacent cutting edges in the third group and, the distance between the at least one cutting edge in the third group and the adjacent cutting edge in the adjacent group;
the third circumferential width differing from the first and second circumferential widths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A saw blade comprising:
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a flat, circular disc having a peripheral outer edge and a center hole; a plurality of circumferentially-spaced teeth each having a substantially axially extending cutting edge and projecting radially outwardly from the peripheral outer edge; a first group of the cutting edges including five of the cutting edges and defining a first circumferential width between each adjacent pair of the cutting edges in the first group;
the first group including a first cutting edge and a last cutting edge defining therebetween a first group circumferential width of approximately sixty degrees;a second group of the cutting edges including three of the cutting edges and defining a second circumferential width between each adjacent pair of the cutting edges in the second group;
the second circumferential width differing from the first circumferential width;
the second group including a first cutting edge and a last cutting edge defining therebetween a second group circumferential width of approximately forty degrees; anda third group of the cutting edges having at least one of the cutting edges defining a third circumferential width as one of the distance between adjacent cutting edges in the third group and, the distance between the at least one cutting edge in the third group and the adjacent cutting edge in the adjacent group;
the third circumferential width differing from the first and second circumferential widths;
the third group including only one of the cutting edges;
the one cutting edge of the third group and the last cutting edge of the second group defining therebetween a third group circumferential width of approximately thirty-six degrees. - View Dependent Claims (39)
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40. A saw blade comprising:
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a flat, circular disc having a peripheral outer edge and a center hole; a plurality of circumferentially-spaced teeth each having a substantially axially extending cutting edge and projecting radially outwardly from the peripheral outer edge; a first group of the cutting edges defining a first circumferential width between each adjacent pair of the cutting edges in the first group; a second group of the cutting edges defining a second circumferential width between each adjacent pair of the cutting edges in the second group;
the second circumferential width differing from the first circumferential width;a third group of the cutting edges having at least one of cutting edges defining a third circumferential width as one of the distance between adjacent cutting edges in the third group and, the distance between the at least one cutting edge in the third group and the adjacent cutting edge in the adjacent group;
the third circumferential width differing from the first and second circumferential widths;wherein at least one of the groups has a plurality of teeth fully therein; wherein each of at least two of the groups has a number of the cutting edges therein and a number of teeth fully therein equal to the number of the cutting edges therein minus one; and wherein the teeth in the first group are identical, the teeth in the second group are identical, the teeth in the third group are identical and the teeth in each group is different from the teeth in the other two groups.
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41. A saw blade comprising:
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a flat, circular disc having a peripheral outer edge and a center hole, the disc being divided into a first half and a second half, each half being a copy of the other half positioned in a diametrically opposite manner; a plurality of circumferentially-spaced teeth each having a substantially axially extending cutting edge and projecting radially outwardly from the peripheral outer edge; a first group in each half having five of the cutting edges including a first cutting edge and a last cutting edge defining therebetween a first group circumferential width of approximately sixty degrees; a second group in each half having three of the cutting edges including a first cutting edge and a last cutting edge defining therebetween a second group circumferential width of approximately forty degrees; a third group in each half having only one of the cutting edges and having a third group circumferential width defined between the one cutting edge of the third group and the last cutting edge of the second group, the third group circumferential width being approximately thirty-six degrees; a first circumferential space being between the first and second groups in each half and having an approximately twenty-degree circumferential width; and a second circumferential space being between the third group in each half and the first group in the respective other half and having an approximately twenty-four-degree circumferential width.
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42. A saw blade comprising:
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a flat, circular disc having a peripheral outer edge and a center hole; a plurality of circumferentially-spaced teeth each having a substantially axially extending cutting edge and projecting radially outwardly from the peripheral outer edge; a first group of the cutting edges defining a first circumferential width between each adjacent pair of the cutting edges in the first group; a second group of the cutting edges defining a second circumferential width between each adjacent pair of the cutting edges in the second group;
the second circumferential width differing from the first circumferential width;a third group of the cutting edges having at least one of the cutting edges defining a third circumferential width as one of the distance between adjacent cutting edges in the third group and, the distance between the at least one cutting edge in the third group and the adjacent cutting edge in the adjacent group;
the third circumferential width differing from the first and second circumferential widths;wherein at least one of the groups has a plurality of teeth fully therein; wherein the blade has a center about which the center hole is formed;
wherein all the cutting edges are substantially radially equidistant from the center of the blade;
wherein each tooth has a positive hook angle; andwherein the teeth within the first group are substantially identical to one another;
wherein the teeth within the second group are substantially identical to one another; and
wherein the teeth in the first group and the teeth in the second group are different from one another.
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43. A saw blade comprising:
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a flat, circular disc having a peripheral outer edge and a center hole; a plurality of circumferentially-spaced teeth each having a substantially axially extending cutting edge and projecting radially outwardly from the peripheral outer edge; a first group of the cutting edges defining a first circumferential width between each adjacent pair of the cutting edges in the first group; a second group of the cutting edges defining a second circumferential width between each adjacent pair of the cutting edges in the second group;
the second circumferential width differing from the first circumferential width;a third group of the cutting edges having at least one of the cutting edges defining a third circumferential width as one of the distance between adjacent cutting edges in the third group and, the distance between the at least one cutting edge in the third group and the adjacent cutting edge in the adjacent group;
the third circumferential width differing from the first and second circumferential widths; andwherein one of the first and second groups includes a plurality of substantially identical teeth. - View Dependent Claims (44)
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Specification