Miter saw with improved safety system
First Claim
Patent Images
1. A miter saw comprising:
- a base assembly defining a cutting zone;
a motor assembly associated with the base assembly and including an arbor rotatable about an elongate central axis;
a blade mounted on the arbor and configured to selectively cut workpieces in the cutting zone; and
a safety system including one or more support arms and a braking mechanism having at least one brake member adapted to engage the blade, where the brake member is coupled to the one or more support arms, and where the one or more support arms are configured to move the brake member in a substantially arcuate path about the elongate central axis of the arbor.
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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.
350 Citations
18 Claims
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1. A miter saw comprising:
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a base assembly defining a cutting zone;
a motor assembly associated with the base assembly and including an arbor rotatable about an elongate central axis;
a blade mounted on the arbor and configured to selectively cut workpieces in the cutting zone; and
a safety system including one or more support arms and a braking mechanism having at least one brake member adapted to engage the blade, where the brake member is coupled to the one or more support arms, and where the one or more support arms are configured to move the brake member in a substantially arcuate path about the elongate central axis of the arbor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A miter saw comprising:
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a base assembly defining a cutting zone;
a first linkage assembly pivotally coupled to the base assembly;
a second linkage assembly pivotally coupled to the base assembly;
a housing having at least a first region pivotally coupled to the first linkage assembly and at least a second region pivotally coupled to the second linkage assembly, where the first and second linkage assemblies couple the housing to the base so that the housing is moveable toward and away from the cutting zone;
a motor mounted on the housing;
a rotatable blade coupled to be driven by the motor to cut workpieces within the cutting zone when the housing is pivoted toward the cutting zone;
a detection system configured to detect one or more dangerous conditions between a person and the blade; and
a reaction system configured to take one or more predetermined actions in the event a dangerous condition is detected by the detection system, where the reaction system includes at least one brake member configured to engage and stop rotation of the blade in the event a dangerous condition is detected by the detection system;
where the brake member is configured to revolve about the blade as the housing is moved toward and away from the cutting zone. - View Dependent Claims (11)
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12. A miter saw comprising:
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a base assembly defining a cutting zone;
a housing coupled to the base assembly to move toward and away from the cutting zone;
a rotatable blade mounted at least partially within the housing and configured to cut workpieces within the cutting zone when the housing is moved toward the cutting zone;
a motor coupled to drive the blade; and
a safety system including at least one brake member configured to selectively engage and stop the rotation of the blade upon the occurrence of one or more predetermined events, where the brake member is coupled to move in an arcuate path that is generally concentric with the blade as the housing is moved toward and away from the cutting zone. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A miter saw comprising:
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a base assembly defining a cutting zone;
a pivot arm assembly pivotally coupled to the base assembly and pivotal toward and away from the cutting zone;
a circular blade supported by the pivot arm assembly and configured to cut workpieces within the cutting zone when the pivot arm assembly is pivoted toward the cutting zone;
a motor configured to rotate the blade; and
a safety system configured to stop the rotation of the blade upon the occurrence of one or more dangerous conditions between a person and the blade, where the safety system includes at least one brake member configured to brake the blade; and
where the safety system includes means for moving the brake member around the perimeter of the blade in the direction of the blade rotation when the pivot arm assembly is pivoted away from the cutting zone, and in the direction opposite the blade rotation when the pivot arm assembly is pivoted toward the cutting zone.
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Specification