Miter saw with improved safety system
First Claim
Patent Images
1. A miter saw comprising:
- a base adapted to support a workpiece during cutting;
a motor;
a rotatable, circular blade driven by the motor, where the blade includes teeth around its periphery;
a pivot arm assembly associated with the base and supporting the blade, where the pivot arm assembly is adapted to pivot toward and away from the base to move the blade toward and away from the base; and
a safety system having a detection subsystem adapted to detect the occurrence of an unsafe condition between a person and the blade, and a reaction subsystem adapted to mitigate the unsafe condition, where the reaction subsystem includes a brake mechanism adjacent the blade, and where at least a part of the brake mechanism is adapted to pivot into the teeth of the blade to engage the blade.
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Abstract
A miter saw is disclosed having a base, a blade supported by the base, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system associated with the detection system to cause a predetermined action to take place upon detection of the dangerous condition. The blade is rotatable, and moves into a cutting zone to cut a workpiece. The predetermined action may be to stop the blade from rotating, to create an impulse against movement of the blade into the cutting zone, or to cause the blade to move away from the cutting zone.
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Citations
20 Claims
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1. A miter saw comprising:
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a base adapted to support a workpiece during cutting;
a motor;
a rotatable, circular blade driven by the motor, where the blade includes teeth around its periphery;
a pivot arm assembly associated with the base and supporting the blade, where the pivot arm assembly is adapted to pivot toward and away from the base to move the blade toward and away from the base; and
a safety system having a detection subsystem adapted to detect the occurrence of an unsafe condition between a person and the blade, and a reaction subsystem adapted to mitigate the unsafe condition, where the reaction subsystem includes a brake mechanism adjacent the blade, and where at least a part of the brake mechanism is adapted to pivot into the teeth of the blade to engage the blade. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A miter saw comprising:
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a base adapted to support a workpiece during cutting;
a motor;
a rotatable, circular, generally planar blade driven by the motor, where the blade includes teeth around its periphery;
a pivot arm assembly associated with the base and supporting the blade, where the pivot arm assembly is adapted to pivot toward and away from the base to move the blade toward and away from the base; and
a safety system having a detection subsystem adapted to detect the occurrence of an unsafe condition between a person and the blade, and a reaction subsystem adapted to mitigate the unsafe condition, where the reaction subsystem includes a brake configured to pivot into the teeth of the blade around an axis generally perpendicular to the plane of the blade. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A miter saw comprising:
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a base adapted to support a workpiece during cutting;
a fence on the base;
a motor;
a rotatable, circular blade driven by the motor, where the blade includes teeth around its periphery;
a pivot arm assembly associated with the base and supporting the blade, where the pivot arm assembly is adapted to pivot toward and away from the base to move the blade toward and away from the base; and
a safety system having a detection subsystem adapted to detect the occurrence of an unsafe condition between a person and the blade, and a reaction subsystem adapted to mitigate the unsafe condition, where the reaction subsystem includes brake means for pivoting into the teeth of the blade to stop the rotation of the blade if an unsafe condition is detected by the detection subsystem. - View Dependent Claims (20)
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Specification