Abstract: A power tool includes a housing assembly having a first housing portion and a second housing portion supported for pivoting movement relative to the first housing portion about a pivot axis. The first housing portion supports a motor. The second housing portion includes a chuck for supporting a tool element. The power tool also includes a gear supported within the housing assembly for rotation relative to at least one of the first and second housing portions about the pivot axis. The gear is operable to transfer drive force from the motor to the tool element.

Abstract: A stud punch head for a power tool includes a head housing and a first arm movably coupled to the head housing. The first arm supports a punch. The stud punch head also includes a second arm movably coupled to the head housing and relative to the first arm. The second arm supports a die opposite the punch. The stud punch head also includes a drive mechanism positioned at least partially within the head housing and operatively coupled to a motor of the power tool. The drive mechanism is operable to move the first arm and the second arm toward and away from each other.

Abstract: A drive mechanism for a power tool. The power tool includes a motor having a drive shaft and an output member adapted to support a tool element. The drive mechanism includes a drive assembly engaged with and driven by the drive shaft and a drive arm drivingly connected between the drive assembly and the output member to transmit driving force from the drive assembly to the output member. The drive arm is configured to absorb an impact.

Abstract: A power tool includes a housing assembly having a first housing portion and a second housing portion supported for pivoting movement relative to the first housing portion about a pivot axis. The first housing portion supports a motor. The second housing portion includes a chuck for supporting a tool element. The power tool also includes a gear supported within the housing assembly for rotation relative to at least one of the first and second housing portions about the pivot axis. The gear is operable to transfer drive force from the motor to the tool element.

Abstract: A stud punch head for a power tool includes a head housing and a first arm movably coupled to the head housing. The first arm supports a punch. The stud punch head also includes a second arm movably coupled to the head housing and relative to the first arm. The second arm supports a die opposite the punch. The stud punch head also includes a drive mechanism positioned at least partially within the head housing and operatively coupled to a motor of the power tool. The drive mechanism is operable to move the first arm and the second arm toward and away from each other.

Abstract: A drive mechanism for a power tool. The power tool includes a motor having a drive shaft and an output member adapted to support a tool element. The drive mechanism includes a drive assembly engaged with and driven by the drive shaft and a drive arm drivingly connected between the drive assembly and the output member to transmit driving force from the drive assembly to the output member. The drive arm is configured to absorb an impact.

Abstract: A drive mechanism for a power tool, a power tool and a reciprocating saw. The power tool includes a housing, a motor supported by the housing and including a drive shaft, an output member supported by the housing and adapted to support a tool element, and a drive mechanism. The drive mechanism includes a drive assembly driven by the drive shaft for rotation about an axis, the drive assembly including a gear, a hub selectively driven by the gear for rotation about the axis, and structure positioned between the gear and the hub, the structure selectively transmitting drive force between the gear and the hub and selectively allows relative movement between the gear and the hub. The drive mechanism may also include a drive arm drivingly connected between the drive assembly and the output member of a tool, and the drive arm may be configured to absorb an impact.

Abstract: A reciprocating saw comprising a reciprocatable spindle having an end adapted to receive a saw blade, and a blade clamp mechanism connected to the spindle and adapted to attach the saw blade to the spindle. The blade clamp mechanism includes an actuating member mounted on the end of the spindle, a locking member operatively associated with the actuating member, and a biasing member interconnected with the actuating member for biasing the actuating member toward an engaged position. A cover encloses a substantial portion of the biasing member. A housing, made from a thermally insulative material, is mounted to the actuating member. An ejecting member is interconnected with the spindle and is capable of engaging the saw blade such that the saw blade is urged away from the end of the spindle.

Abstract: A clamp for the blade of a hand held reciprocating tool includes a spindle coupled to the drive mechanism. A slot is formed in the spindle for receiving the blade tang and a collar is threadably received on the spindle. A blade clamping member is disposed between the collar and the blade and includes an engaging member for engaging a hole in the blade tang and a pair of ears which engage the upper and lower shoulders of the blade tang to provide three points of engagement when the collar is tightened. The clamp also includes a nose section which engages the blade at its junction with the tang to provide reinforcement against breakage.

Abstract: A power tool including an inertia responsive element. The power tool comprises a housing, a motor supported by the housing and adapted to be connected to a power source, an output element supported by the housing and selectively coupled to the motor, the motor imparting motion to the output element, and an inertia responsive element for disconnecting the output element from the power source if movement of the housing is greater than a predetermined threshold. In one embodiment, the power tool is a hand held power tool having a handle, and the inertia responsive element disconnects the output element from the power source should the handle move at a rate greater than a predetermined rate. In another embodiment, the power tool is a stationary power tool, such as a drill press. The housing of the stationary power tool includes a base for supporting the stationary power tool on the workpiece.

Abstract: A clamp for the blade of a hand held reciprocating tool includes a spindle coupled to the drive mechanism. A slot is formed in the spindle for receiving the blade tang and a collar is threadably received on the spindle. A blade clamping member is disposed between the collar and the blade and includes an engaging member for engaging a hole in the blade tang and a pair of ears which engage the upper and lower shoulders of the blade tang to provide three points of engagement when the collar is tightened. The clamp also includes a nose section which engages the blade at its junction with the tang to provide reinforcement against breakage.

Abstract: A hand held power tool includes a motor coupled to an output element and an inertia switch operative to disable the output element upon movement of the tool at a rate greater than a determined rate. The inertia switch disables the output element by open circuiting the motor or uncoupling the output element from the motor.