Miter saw with improved safety system
First Claim
Patent Images
1. A miter saw comprising:
- a base assembly defining a cutting zone and configured to support workpieces in the cutting zone;
a housing assembly coupled to the base assembly and selectively movable toward and away from the cutting zone;
a rotatable blade supported at least partially within the housing and configured to cut workpieces supported within the cutting zone, where the blade has an angular momentum when rotated; and
a braking system actuatable to stop the rotation of the blade, where the braking system is configured to transfer at least a portion of the angular momentum of the blade to the housing assembly.
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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.
123 Citations
20 Claims
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1. A miter saw comprising:
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a base assembly defining a cutting zone and configured to support workpieces in the cutting zone;
a housing assembly coupled to the base assembly and selectively movable toward and away from the cutting zone;
a rotatable blade supported at least partially within the housing and configured to cut workpieces supported within the cutting zone, where the blade has an angular momentum when rotated; and
a braking system actuatable to stop the rotation of the blade, where the braking system is configured to transfer at least a portion of the angular momentum of the blade to the housing assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A miter saw comprising:
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a base assembly defining a cutting zone;
a circular blade supported by the base assembly;
a motor configured to rotate the blade;
a housing assembly coupled to the base assembly and configured to at least partially enclose the blade, where the housing assembly includes a blade guard movable between an extended position relatively proximal the cutting zone and a retracted position relatively distal the cutting zone; and
a reaction system configured to detect one or more dangerous conditions between a person and the blade, and to urge the blade guard toward the extended position in the event a dangerous condition is detected. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 18, 19)
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17. A miter saw comprising:
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a base assembly defining a cutting zone and configured to support workpieces in the cutting zone;
a housing assembly supported by the base assembly and selectively movable toward and away from the cutting zone, where the housing assembly includes at least one exterior surface;
a rotatable blade enclosed at least partially within the housing and configured to cut workpieces supported within the cutting zone;
a motor configured to rotate the blade; and
a brake mechanism configured to stop the rotation of the blade, where the brake mechanism includes a cartridge that is removably attachable to the housing assembly to form at least a portion of the at least one exterior surface.
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20. A miter saw comprising:
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a base assembly defining a cutting zone and configured to support workpieces in the cutting zone;
a housing assembly coupled to the base assembly and selectively movable toward and away from the cutting zone;
a rotatable blade configured to cut workpieces supported within the cutting zone, where the blade is supported at least partially within the housing assembly, and where the blade has angular momentum when rotating; and
braking means for stopping rotation of the blade upon the occurrence of one or more dangerous conditions, the braking means including means for transferring at least a portion of the angular momentum of the blade to the housing assembly.
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Specification