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US 12,629,858 B2Granted
Circular saw blade
AssigneeBlack & Decker Inc.
InventorsAsif Elliston, Kenneth E. Hall, Graham E. Lincoln
Life of this patent
Estimating the term…
Abstract
A circular saw blade includes a plurality of cutting teeth repeatedly alternating between a first set of cutting teeth and a second set of cutting teeth around the periphery of the saw blade. Each first set of cutting teeth includes at least two efficient cutting teeth, each second set of cutting teeth comprising at least ne robust cutting tooth. Each first set of teeth and each second set of teeth are configured such that, if one tooth in the first set of teeth breaks, the chip load in the immediately following second set of teeth increases by less than approximately 45%.
Claims20
A circular saw blade comprising:
- a generally circular blade body having a first side face and an opposite second side face;
- a plurality of tooth holders coupled to a periphery of the blade body;
- a plurality of gullets, each gullet disposed between two adjacent cutting tooth holders;
- a plurality of teeth, each tooth supported by one of the tooth holders and having a rake face facing toward an adjacent gullet and extending transverse to the first and second side faces, a relief face extending from the rake face toward the tooth holder that is supporting the cutting tooth and extending transverse to the first and second side faces, and a cutting edge at a junction between the rake face and a relief face and extending transverse to the first and second side faces,
- wherein the plurality of teeth sequentially alternate between a first set of cutting teeth and a second set of cutting teeth around the periphery of the blade body,
- wherein the first set of cutting teeth have relief faces beveled toward one of the first side face and the second side face in an alternating top bevel pattern at a first top bevel angle, the rake face disposed at a first rake angle relative to a radius of the blade body, and the relief face disposed at a first relief angle relative a line tangent to the periphery of the blade body, wherein the second set of cutting teeth have relief faces beveled toward one of the first side face and the second side face in an alternating top bevel pattern at a second top bevel angle, the rake face disposed at a second rake angle relative to a radius of the blade body, and the relief face disposed at a second relief angle relative a line tangent to the periphery of the blade body,
- wherein at least two out of the following three conditions are satisfied:
- (a) the second bevel angle is less than the first bevel angle;
- (b) the second rake angle is less than the first rake angle, and (c) the second relief angle is less than the first relief angle, and
- wherein the first set of cutting teeth and the second set of cutting teeth are configured so that the second set of cutting teeth receive a greater percentage of a total chip load on the plurality of teeth than the first set of cutting teeth.
7 more elements
A circular saw blade comprising:
- a generally circular blade body having a first side face and an opposite second side face;
- a plurality of tooth holders coupled to a periphery of the blade body;
- a plurality of gullets, each gullet disposed between two adjacent cutting tooth holders;
- a plurality of teeth, each tooth supported by one of the tooth holders and having a rake face facing toward an adjacent gullet and extending transverse to the first and second side faces, a relief face extending from the rake face toward the tooth holder that is supporting the cutting tooth and extending transverse to the first and second side faces, and a cutting edge at a junction between the rake face and a relief face and extending transverse to the first and second side faces,
- wherein the plurality of teeth sequentially alternate between a first set of cutting teeth and a second set of cutting teeth around the periphery of the blade body,
- wherein the first set of cutting teeth have relief faces beveled toward one of the first side face and the second side face in an alternating top bevel pattern at a first top bevel angle, the rake face disposed at a first rake angle relative to a radius of the blade body, and the relief face disposed at a first relief angle relative a line tangent to the periphery of the blade body,
- wherein the second set of cutting teeth comprise one or more raker teeth, each raker tooth having a relief face that is symmetrical relative to the first side face and the second side face,
- wherein at least two out of the following three conditions are satisfied:
- (a) the second bevel angle is less than the first bevel angle;
- (b) the second rake angle is less than the first rake angle, and (c) the second relief angle is less than the first relief angle, and
- wherein the first set of cutting teeth and the second set of cutting teeth are configured so that the second set of cutting teeth receive a greater percentage of a total chip load on the plurality of teeth than the first set of cutting teeth.
8 more elements
Dependencies are inferred from the claim text.