The hand-held cutter includes: a cutting blade which is configured to rotate about a rotation shaft to cut a target; a cutter body which rotatably supports the cutting blade; a protection cover which covers a portion of the cutting blade and is rotatable about the rotation shaft; a pressing mechanism which is configured to move toward the protection cover to press a guide plate onto a support plate so as to impose and maintain restrictions on rotation of the protection cover; and a torsion coil spring exerting a biasing force to move the pressing mechanism toward the protection cover. The hand-held cutter is configured such that moving the pressing mechanism, against the biasing force of the torsion coil spring, away from the protection cover removes restrictions on the rotation of the protection cover.

The hand-held cutter includes: a cutting blade which is configured to rotate about a rotation shaft to cut a target; a cutter body which rotatably supports the cutting blade; a protection cover which covers a portion of the cutting blade and is rotatable about the rotation shaft; a pressing mechanism which is configured to move toward the protection cover to press a guide plate onto a support plate so as to impose and maintain restrictions on rotation of the protection cover; and a torsion coil spring exerting a biasing force to move the pressing mechanism toward the protection cover. The hand-held cutter is configured such that moving the pressing mechanism, against the biasing force of the torsion coil spring, away from the protection cover removes restrictions on the rotation of the protection cover.

Power tools with conductive couplings used with active injury mitigation technology are disclosed. Systems and methods to detect degradation or failure of a conductive coupling in an AIM-enabled power tool are disclosed. Systems and methods to detect impedance of a conductive coupling in an AIM-enabled power tool are disclosed, along with systems and methods to disable such power tool in the event that the detected impedance falls outside predetermined thresholds.

A table saw in one embodiment includes a motor, a blade operably connected to the motor, at least a portion of the blade positioned within an enclosure, and a dust plate extending within the enclosure and positioned between the at least a portion of the blade and the motor.

A table saw in one embodiment includes a motor, a blade operably connected to the motor, at least a portion of the blade positioned within an enclosure, and a dust plate extending within the enclosure and positioned between the at least a portion of the blade and the motor.

A power tool in one embodiment includes a work-piece support surface, a swing arm assembly movable along a swing path between a first swing arm position whereat a portion of a shaping device supported by the swing arm assembly extends above the work-piece support surface and a second swing arm position whereat the portion of the shaping device does not extend above the work-piece support surface, a latch pin pivotable between a first position engaged with the swing arm assembly and a second position whereat the latch is not engaged with the swing arm assembly, an actuator configured to pivot the latch pin from the first position to the second position and to force the swing arm assembly away from the first swing arm position and toward the second swing arm position, and a control system configured to actuate the actuator in response to a sensed condition.

A power tool in one embodiment includes a work-piece support surface, a swing arm assembly movable along a swing path between a first swing arm position whereat a portion of a shaping device supported by the swing arm assembly extends above the work-piece support surface and a second swing arm position whereat the portion of the shaping device does not extend above the work-piece support surface, a latch pin pivotable between a first position engaged with the swing arm assembly and a second position whereat the latch is not engaged with the swing arm assembly, an actuator configured to pivot the latch pin from the first position to the second position and to force the swing arm assembly away from the first swing arm position and toward the second swing arm position, and a control system configured to actuate the actuator in response to a sensed condition.

A blade guard assembly for a circular saw blade of a saw house includes a blade cover with a face panel and an edge portion that extends from the face panel. An actuator is mountable the blade cover and the structure of the saw house. When the blade guard assembly is mounted in saw house, the blade cover is movable with the actuator between a covered position and an exposed position. In the covered position, the face panel and edge portion at least partially surround the saw blade. In the exposed position, the face panel is spaced from the saw blade.

A safety lock mechanism mounted at a trigger switch handle of a miter saw to face toward a switch which includes a switch button pivotally mounted at the trigger switch handle to face toward the switch, and a safety lock connected to the switch button and providing an engaging portion and movable between a locking position where the engaging portion engages into the trigger switch handle to lock the switch button to the trigger switch handle and an unlocking position where the engaging portion is disengaged from the trigger switch handle for allowing the switch button to be moved relative to the trigger switch handle to trigger the switch. Thus, the arrangement of the safety lock prevents the user from accidentally forcing the switch button to trigger the switch, enhancing the operational safety of the miter saw.

A safety lock mechanism mounted at a trigger switch handle of a miter saw to face toward a switch which includes a switch button pivotally mounted at the trigger switch handle to face toward the switch, and a safety lock connected to the switch button and providing an engaging portion and movable between a locking position where the engaging portion engages into the trigger switch handle to lock the switch button to the trigger switch handle and an unlocking position where the engaging portion is disengaged from the trigger switch handle for allowing the switch button to be moved relative to the trigger switch handle to trigger the switch. Thus, the arrangement of the safety lock prevents the user from accidentally forcing the switch button to trigger the switch, enhancing the operational safety of the miter saw.