Miter saw with improved safety system
First Claim
Patent Images
1. A miter saw comprising:
- 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.
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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
9 Claims
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1. 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 (2, 3)
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4. 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; where the reaction system includes a brake mechanism configured to stop rotation of the blade, and where at least a portion of the brake mechanism is coupled to the blade guard. - View Dependent Claims (5, 6, 7, 8)
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9. 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 accidental contact between a person and the blade and to urge the blade guard toward the extended position in the event contact is detected.
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Specification