Abstract: The present invention provides methods and systems for a rotary impact device having an annular exterior surface for use with an impact wrench for providing torque to a fastener. The rotary impact device includes an input member having an input recess for receiving the anvil of the impact wrench, an output member having an output recess for receiving the fastener, and an inertia member. The inertia member is stationary and positioned on the exterior surface of the rotary impact device for increasing the torque applied to the fastener.

Abstract: An angle impact tool includes a handle assembly extending along a first axis, a prime mover in the handle, an output shaft rotatable about the first axis, and a work attachment connected to the handle assembly. An output drive is supported in the work attachment for rotation about an output axis perpendicular to the first axis. A gear assembly including a spur gear is positioned within the work attachment to transfer torque from the prime mover about the first axis to the output drive about the output axis. An impact mechanism is positioned within the work attachment and includes a hammer and an anvil. The hammer rotates under the influence of the prime mover and is operable to periodically deliver an impact load to the anvil. The output drive rotates about the output axis under the influence of the impact load being transmitted to the output drive by the anvil.

Abstract: A pistol and/or clam shell style power tool housing. With respect to the pistol style housing, the tool housing includes a body defining a head portion with a handle portion depending therefrom to define a forward and/or a rear junction. A metal reinforcing member is configured to span along an inside surface of the body from the head portion to the handle portion such that the reinforcing member bridges either the forward or rear junction. In at least one embodiment, the reinforcing member is provided along each lateral side of the tool body. With respect to the clam shell style housing, with two opposed body halves interconnected to define the tool housing body, at least one continuous reinforcing ring is positioned about both halves of the tool housing body to prevent splitting between the two halves.

Abstract: A cordless power tool battery pack including an onboard circuit configured to electronically communicate with an associated battery charging system. The onboard circuit communicates information relating to the batter pack to a microprocessor or the like within the battery charging system and charging of the battery pack is controlled based on such communication.

Abstract: A pneumatic impact tool includes a handle, a work attachment coupled to the handle, an inlet and an outlet permitting air flow through the tool to drive the tool. A motor assembly is functionally positioned between the inlet and the outlet, the motor assembly having a rotor driven by the air flow, and the motor assembly defining a longitudinal motor axis about which the rotor rotates. An output drive is connected to the motor assembly to selectively rotate the output drive in response to rotation of the rotor. The output drive defines a longitudinal output axis about which the output drive rotates, such that the longitudinal output axis is substantially perpendicular to the longitudinal motor axis. An impact mechanism is functionally positioned between the motor assembly and the output drive, such that the impact mechanism drives the output drive with impact forces in response to rotation of the rotor.

Abstract: A cordless power tool battery pack including an onboard circuit configured to electronically communicate with an associated battery charging system. The onboard circuit communicates information relating to the batter pack to a microprocessor or the like within the battery charging system and charging of the battery pack is controlled based on such communication.

Abstract: An impact mechanism includes a shaft, a hammer and an anvil coupled to the hammer. The shaft has a first helical groove and the hammer has a second helical groove. A ball is received in the first and second helical grooves to rotationally couple the hammer to the shaft and permit axial travel of the hammer relative to the shaft. An axial stop inhibits axial travel of the hammer along a first travel path and permits axial travel of the hammer along a second travel path. The axial stop includes first and second stop members, the first and second stop members having a first relative position to inhibit axial travel of the hammer and a second relative position to permit axial travel of the hammer.

Abstract: An electric impact tool in which a rotating mass rotates in a forward direction to impact upon and transfer torque to an anvil, and rotates in a reverse direction opposite the forward direction in response to such impact. A direction sensor monitors the direction of rotation of the rotating mass, and a controller turns an electric motor on and off during respective forward and reverse rotation of the rotating mass. An energy storing mechanism may be used to absorb energy from reverse rotation of the rotating mass and release the absorbed energy to rotate the rotating mass in the forward direction. A controller may be used to store the angular position of the rotating mass upon each impact and turn off the motor prior to the following impact to avoid energizing the motor during stall.

Abstract: An electric impact tool in which a rotating mass rotates in a forward direction to impact upon and transfer torque to an anvil, and rotates in a reverse direction opposite the forward direction in response to such impact. A direction sensor monitors the direction of rotation of the rotating mass, and a controller turns an electric motor on and off during respective forward and reverse rotation of the rotating mass. An energy storing mechanism may be used to absorb energy from reverse rotation of the rotating mass and release the absorbed energy to rotate the rotating mass in the forward direction. A controller may be used to store the angular position of the rotating mass upon each impact and turn off the motor prior to the following impact to avoid energizing the motor during stall.

Abstract: An impact mechanism includes a shaft, a hammer and an anvil coupled to the hammer. The shaft has a first helical groove and the hammer has a second helical groove. A ball is received in the first and second helical grooves to rotationally couple the hammer to the shaft and permit axial travel of the hammer relative to the shaft. An axial stop inhibits axial travel of the hammer along a first travel path and permits axial travel of the hammer along a second travel path. The axial stop includes first and second stop members, the first and second stop members having a first relative position to inhibit axial travel of the hammer and a second relative position to permit axial travel of the hammer.

Abstract: An electric impact tool in which a rotating mass rotates in a forward direction to impact upon and transfer torque to an anvil, and rotates in a reverse direction opposite the forward direction in response to such impact. A direction sensor monitors the direction of rotation of the rotating mass, and a controller turns an electric motor on and off during respective forward and reverse rotation of the rotating mass. An energy storing mechanism may be used to absorb energy from reverse rotation of the rotating mass and release the absorbed energy to rotate the rotating mass in the forward direction. A controller may be used to store the angular position of the rotating mass upon each impact and turn off the motor prior to the following impact to avoid energizing the motor during stall.

Abstract: An electric impact tool in which a rotating mass rotates in a forward direction to impact upon and transfer torque to an anvil, and rotates in a reverse direction opposite the forward direction in response to such impact. A direction sensor monitors the direction of rotation of the rotating mass, and a controller turns an electric motor on and off during respective forward and reverse rotation of the rotating mass. An energy storing mechanism may be used to absorb energy from reverse rotation of the rotating mass and release the absorbed energy to rotate the rotating mass in the forward direction. A controller may be used to store the angular position of the rotating mass upon each impact and turn off the motor prior to the following impact to avoid energizing the motor during stall.