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 pivot arm coupled to the base assembly and selectively moveable toward and away from the cutting zone;
a tilt mechanism between the base assembly and the pivot arm, where the tilt mechanism is configured so that the pivot arm may tilt relative to the base assembly;
a motor assembly;
a rotatable arbor supported by the pivot arm and driven by the motor assembly;
a rotatable blade mounted on the arbor and configured to cut workpieces supported within 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 stop movement of the pivot arm toward the base assembly upon detection by the detection system of the one or more dangerous conditions, where the reaction system comprises a brace member and a locking assembly;
where the brace member is coupled to the tilt mechanism and the locking assembly;
where the locking assembly is coupled to the pivot arm; and
where the locking assembly is configured to lock onto the brace member to prevent the pivot arm from moving toward the base assembly when the detection system detects the one or more dangerous conditions between a person and the blade.
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Accused Products
Abstract
A miter saw having a base and an arm that pivots toward the base is disclosed. A blade is supported by the arm, and is designed to cut workpieces resting on the base when the arm and blade pivot downward. The saw includes a detection system configured to detect one or more dangerous conditions between a person and the blade, such as when a person accidentally touches the spinning blade, and the saw includes a reaction system to stop the downward movement of the blade and arm when the dangerous condition is detected.
352 Citations
12 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 pivot arm coupled to the base assembly and selectively moveable toward and away from the cutting zone;
a tilt mechanism between the base assembly and the pivot arm, where the tilt mechanism is configured so that the pivot arm may tilt relative to the base assembly;
a motor assembly;
a rotatable arbor supported by the pivot arm and driven by the motor assembly;
a rotatable blade mounted on the arbor and configured to cut workpieces supported within 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 stop movement of the pivot arm toward the base assembly upon detection by the detection system of the one or more dangerous conditions, where the reaction system comprises a brace member and a locking assembly;
where the brace member is coupled to the tilt mechanism and the locking assembly;
where the locking assembly is coupled to the pivot arm; and
where the locking assembly is configured to lock onto the brace member to prevent the pivot arm from moving toward the base assembly when the detection system detects the one or more dangerous conditions between a person and the blade. - View Dependent Claims (2, 3, 4, 5, 6)
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7. 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 pivot arm coupled to the base assembly and selectively moveable toward and away from the cutting zone;
a motor assembly;
a rotatable arbor supported by the pivot arm and driven by the motor assembly;
a rotatable blade mounted on the arbor and configured to cut workpieces supported within 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 stop movement of the pivot arm toward the base assembly upon detection by the detection system of the one or more dangerous conditions, where the reaction system comprises a brace member and a locking assembly;
where the brace member is coupled to the base assembly and the locking assembly;
where the locking assembly is coupled to the pivot arm; and
where the locking assembly is configured to lock onto the brace member to prevent the pivot arm from moving toward the base assembly when the detection system detects the one or more dangerous conditions between a person and the blade. - View Dependent Claims (8, 9, 10)
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11. 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 pivot arm coupled to the base assembly and selectively moveable toward and away from the cutting zone;
a tilt mechanism between the base assembly and the pivot arm, where the tilt mechanism is configured so that the pivot arm may tilt relative to the base assembly;
a motor assembly;
a rotatable arbor supported by the pivot arm and driven by the motor assembly;
a rotatable blade mounted on the arbor and configured to cut workpieces supported within the cutting zone;
a detection system configured to detect one or more dangerous conditions between a person and the blade; and
reaction means for stopping movement of the pivot arm toward the base assembly upon detection by the detection system of the one or more dangerous conditions, where the reaction means comprises a brace member and locking means for preventing the pivot arm from moving toward the base assembly when the detection system detects the one or more dangerous conditions between a person and the blade;
where the brace member is coupled to the tilt mechanism and the locking means; and
where the locking means is coupled to the pivot arm.
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12. 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 pivot arm coupled to the base assembly and selectively moveable toward and away from the cutting zone;
a motor assembly;
a rotatable arbor supported by the pivot arm and driven by the motor assembly;
a rotatable blade mounted on the arbor and configured to cut workpieces supported within the cutting zone;
a detection system configured to detect one or more dangerous conditions between a person and the blade; and
reaction means for stopping movement of the pivot arm toward the base assembly upon detection by the detection system of the one or more dangerous conditions, where the reaction means comprises a brace member and locking means for preventing the pivot arm from moving toward the base assembly when the detection system detects the one or more dangerous conditions between a person and the blade;
where the brace member is coupled to the base assembly and the locking means; and
where the locking means is coupled to the pivot arm.
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Specification