Abstract: A flywheel (34) can be mounted on a flywheel carriage (88) that can include a pair of axles (90). The flywheel carriage can be movable along two pairs of guide slots (42) of the tool frame between a disengaged position in which the flywheel is spaced from the fastener driver (26), and an engaged position in which the flywheel is engaged with the fastener driver to drive the fastener driver along a driver axis. A pair of pinch rollers (50) can be coupled to the tool frame and can be engageable with a pinch roller side of the driver profile that is opposite the flywheel side. A plane aligned with an axis of rotation of the flywheel and oriented perpendicular to the driver axis can be located between an axis of rotation of each of the pair of pinch rollers throughout engagement of the flywheel with the fastener driver along the longitudinal flywheel engagement length.

Abstract: A power tool may include a motor and a drive shaft having a first end coupled to the motor and a second end eccentrically coupled to a platen by a retainer bearing and eccentric sleeve. A counterweight component may be coupled to the second end of the drive shaft to counteract imbalance generated by rotation of the retainer bearing, eccentric sleeve and platen. The counterweight component may include a counterweight coupled to the second end of the drive shaft, between the eccentric sleeve and the platen. Alignment of the counterweight may be offset with respect to a centerline of the drive shaft to counteract vibration generated due to interaction of the platen with a workpiece. The counterweight component may also include a counterweight mass member coupled to a sector of the counterweight to counteract vibration generated due to interaction of the platen with a workpiece.

Abstract: A power tool that includes a housing, a motor, a trigger, a multi-speed transmission and a torque clutch. The housing define a handle. The motor is coupled to the housing. The trigger is coupled to the housing and configured to control operation of the motor. The multi-speed transmission is configured to transmit rotary power between the motor and the output spindle and includes a plurality of planetary stages with a first stage and a second stage that receives rotary power from the first stage. The first stage has a first internally toothed gear element and the second stage having a second internally toothed gear element. The torque clutch limits torque output from the multi-speed transmission to the output spindle. The torque clutch is configured to alternatively ground the second and third internally toothed gear elements to the housing based on a speed ratio setting of the multi-speed transmission.

Abstract: A power tool having a rotary impact mechanism and a mode change mechanism. The impact mechanism is driven by an output member of a transmission and includes a hammer and an anvil. The mode change mechanism includes a mode collar that is movable between a first position, in which the mode collar directly couples the hammer to the transmission output member to inhibit movement of the hammer relative to the spindle, and a second position in which the mode collar does not inhibit movement of the hammer relative to the spindle. A power tool having an impact mechanism with an external adjusting member that can be moved to vary a trip torque of the impact mechanism is also provided.

Abstract: A power tool includes a housing, a motor contained in the housing, an output shaft extending proximate a front of the housing, an end effector coupled to the output shaft and configured to hold an accessory; and a transmission disposed in the housing between the motor and the output shaft. The transmission includes a variable ratio gear set configured to transmit power from the motor to the output shaft at a substantially variable speed ratio. The transmission may further include a constant ratio gear set configured to transmit power from the motor at a substantially constant speed ratio. The transmission may be automatically or manually shiftable between a first mode where it transmits power through the constant speed ratio gear set and a second mode where it transmits power through the variable speed ratio gear set.

Abstract: A vibration dampening handle for a powered apparatus includes an elongated gripping member having first and second opposite ends and a longitudinal axis extending through the first and second ends, and a wall defining an inner bore and having an inner surface. The inner bore extending along the longitudinal axis at least partially through the gripping member, and opens on at least the first end of the gripping member. A weighted mass is disposed at the second free cantilevered end of the gripping member. An elongate elastic beam member is attached to the gripping member. A portion of the beam member is disposed within the inner bore and is spaced apart from the inner surface. The beam member further includes a first end that extends beyond the first end of the gripping member and includes a fastening member adapted to connect the handle to the powered apparatus.

Abstract: A power tool includes a housing, a motor contained in the housing, an output shaft extending proximate a front of the housing, an end effector coupled to the output shaft and configured to hold an accessory; and a transmission disposed in the housing between the motor and the output shaft. The transmission includes a variable ratio gear set configured to transmit power from the motor to the output shaft at a substantially variable speed ratio. The transmission may further include a constant ratio gear set configured to transmit power from the motor at a substantially constant speed ratio. The transmission may be automatically or manually shiftable between a first mode where it transmits power through the constant speed ratio gear set and a second mode where it transmits power through the variable speed ratio gear set.

Abstract: A vibration dampening handle for a powered apparatus includes an elongate gripping member including a first end, a second end opposite the first end, a longitudinal axis extending through the first end and the second end, and a wall defining a bore having an inner surface. The bore extends along the longitudinal axis at least partially through the gripping member, and opens on the first end of the gripping member. A mass is disposed at the second end of the gripping member. An elastic beam is attached to or integral with the gripping member. The beam extends along the longitudinal axis and a portion of the beam is disposed within the bore and is spaced apart from the inner surface. The beam includes a first end that extends beyond the first end of the gripping member and includes a fastening member adapted to connect the handle to the powered apparatus.

Abstract: A vibration dampening handle for a powered apparatus includes an elongate gripping member including a first end, a second end opposite the first end, a longitudinal axis extending through the first end and the second end, and a wall defining an inner bore and having an inner surface. The inner bore extends along the longitudinal axis at least partially through the gripping member, and opens on at least the first end of the gripping member. A weighted mass is disposed at the second end of the gripping member. An elongate elastic beam member is one of attached to and integral with the gripping member. The beam member extends along a region of the longitudinal axis and a portion of the beam member is disposed within the inner bore and is spaced apart from the inner surface. The beam member further includes a first end that extends beyond the first end of the gripping member and includes a fastening member adapted to connect the handle to the powered apparatus.

Abstract: A power tool includes a tool body, and the tool body is subject to vibration during operation of the power tool. The power tool also includes a handle adapted to be grasped by an operator of the power tool for controlling the motion of the power tool, and at least one coupling member, where each coupling member includes a first end coupled to the tool body and a second end coupled to the handle and a longitudinal axis between the first end and the second end.

Abstract: A battery pack which includes a battery pack electronic control circuit adapted to control an attached power tool and/or an attached charger. The battery pack includes additional protection circuits, methodologies and devices to protect against fault conditions within the pack, as the pack is operatively attached to and providing power to the power tool, and/or as the pack is operatively attached to and being charged by the charger.

Abstract: A power tool that includes a housing assembly, a motor received in the housing assembly, a trigger, an output spindle, a transmission and a bearing. The transmission is received in the housing assembly and transmits rotary power between the motor and the output spindle. The transmission has an output planetary stage with an output planet carrier. The transmission also has a member that is axially movable between a first position, which causes the transmission to operate in a first speed ratio, and a second position in which the transmission operates in a second speed ratio that is different than the first speed ratio. The bearing is disposed radially between and engages both the housing assembly and the output planet carrier. The output spindle is at least partially received into the output planet carrier such that the bearing indirectly supports the output spindle.

Abstract: A flexible sensor is disposed in a power tool. The flexible sensor has an electrical resistance that varies based on a radius of curvature of the flexible sensor. A trigger partially disposed in the power tool, operates to apply a bending force at an engagement point on the flexible sensor to bend the flexible sensor and alter the radius of curvature. A controller outputs an electrical signal to the power tool based on the electrical resistance to control a function of the power tool.

Abstract: A battery pack which includes a battery pack electronic control circuit adapted to control an attached power tool and/or an attached charger. The battery pack includes additional protection circuits, methodologies and devices to protect against fault conditions within the pack, as the pack is operatively attached to and providing power to the power tool, and/or as the pack is operatively attached to and being charged by the charger.

Abstract: A battery pack which includes a battery pack electronic control circuit adapted to control an attached power tool and/or an attached charger. The battery pack includes additional protection circuits, methodologies and devices to protect against fault conditions within the pack, as the pack is operatively attached to and providing power to the power tool, and/or as they pack is operatively attached to and being charged by the charger.

Abstract: A vibration dampening handle for a powered apparatus includes an elongate gripping member including a first end, a second end opposite the first end, a longitudinal axis extending through the first end and the second end, and a wall defining an inner bore and having an inner surface. The inner bore extends along the longitudinal axis at least partially through the gripping member, and opens on at least the first end of the gripping member. A weighted mass is disposed at the second end of the gripping member. An elongate elastic beam member is one of attached to and integral with the gripping member. The beam member extends along a region of the longitudinal axis and a portion of the beam member is disposed within the inner bore and is spaced apart from the inner surface.

Abstract: A battery pack which includes a battery pack electronic control circuit adapted to control an attached power tool and/or an attached charger. The battery pack includes additional protection circuits, methodologies and devices to protect against fault conditions within the pack, as the pack is operatively attached to and providing power to the power tool, and/or as they pack is operatively attached to and being charged by the charger.

Abstract: A flexible sensor is disposed in a power tool. The flexible sensor has an electrical resistance that varies based on a radius of curvature of the flexible sensor. A trigger partially disposed in the power tool, operates to apply a bending force at an engagement point on the flexible sensor to bend the flexible sensor and alter the radius of curvature. A controller outputs an electrical signal to the power tool based on the electrical resistance to control a function of the power tool.

Abstract: A battery pack which includes a battery pack electronic control circuit adapted to control an attached power tool and/or an attached charger. The battery pack includes additional protection circuits, methodologies and devices to protect against fault conditions within the pack, as the pack is operatively attached to and providing power to the power tool, and/or as the pack is operatively attached to and being charged by the charger.

Abstract: A power tool having a rotary impact mechanism and a mode change mechanism. The impact mechanism is driven by an output member of a transmission and includes a hammer and an anvil. The mode change mechanism includes a mode collar that is movable between a first position, in which the mode collar directly couples the hammer to the transmission output member to inhibit movement of the hammer relative to the spindle, and a second position in which the mode collar does not inhibit movement of the hammer relative to the spindle. A power tool having an impact mechanism with an external adjusting member that can be moved to vary a trip torque of the impact mechanism is also provided.