A driving tool with a mechanical spring uses urging force from a striking spring as driving force and switches its operation mode. The tool includes a striking driver to strike a fastener, a striking spring urging the driver in a driving direction, a contact arm movable to a retracted position in a counter-driving direction in response to pressing against a workpiece, a trigger movable to an on-position in response to user operation, and a mode selector switch to switch the operation mode between continuous drive mode and single drive mode. A driving operation is performed in the continuous drive mode in response to the contact arm moving to the retracted position and the trigger moving to the on-position in any order, and in the single drive mode in response to the contact arm moving to the retracted position and the trigger moving to the on-position in the stated order.

A driver capable of suppressing an increase in a load of a bumper is provided. The driver includes a striking portion provided movably and configured to move to strike a fastener; a bumper configured to be in contact with the striking portion to restrict a range of movement of the striking portion; and a housing configured to support the bumper, the driver further including a load suppressing portion configured to suppress an increase in a load of the bumper based on the load of the bumper detected by a load detection portion or number of operations of the striking portion within a predetermined time.

A driver capable of suppressing an increase in a load of a bumper is provided. The driver includes a striking portion provided movably and configured to move to strike a fastener; a bumper configured to be in contact with the striking portion to restrict a range of movement of the striking portion; and a housing configured to support the bumper, the driver further including a load suppressing portion configured to suppress an increase in a load of the bumper based on the load of the bumper detected by a load detection portion or number of operations of the striking portion within a predetermined time.

A fastener driving apparatus comprises a linear motor, a power source, a control circuit, an energy storage means, a drive mechanism, a piston and an anvil. The motor and drive mechanism are operatively coupled to the energy storage device and/or the piston such that they may alternately actuate the piston and/or engage the energy storage device, and then refrain from acting on the piston and/or energy storage device so as to selectively store potential energy in the energy storage device during, and then to allow the piston to move and act on the anvil to cause the anvil to act on a fastener. In an embodiment, the linear motor comprises a magnetic housing and at least one magnet such that when a voltage is applied across the terminals of the motor, the motor is caused to move to one direction. Reversing the polarity of the applied voltage will move the motor to the opposite direction.

A fastener driving apparatus comprises a linear motor, a power source, a control circuit, an energy storage means, a drive mechanism, a piston and an anvil. The motor and drive mechanism are operatively coupled to the energy storage device and/or the piston such that they may alternately actuate the piston and/or engage the energy storage device, and then refrain from acting on the piston and/or energy storage device so as to selectively store potential energy in the energy storage device during, and then to allow the piston to move and act on the anvil to cause the anvil to act on a fastener. In an embodiment, the linear motor comprises a magnetic housing and at least one magnet such that when a voltage is applied across the terminals of the motor, the motor is caused to move to one direction. Reversing the polarity of the applied voltage will move the motor to the opposite direction.

An electric nail gun includes a muzzle seat, a safety component being movable relative to the muzzle seat, and a cylinder unit connected to the muzzle seat and including a striking cylinder, at least one storage chamber that is adapted for storing pressurized air, and a sealing cap that is coupled to the striking cylinder and the at least one storage chamber. The electric nail gun further includes an air valve disposed in the cylinder unit and being directly and solely movable by the safety component from a closed position to an open position to allow the pressurized air to flow into the striking cylinder, and a nail-striking unit driven movably by the pressurized air for striking a nail when the air valve is at the open position.

An electric nail gun includes a muzzle seat, a safety component being movable relative to the muzzle seat, and a cylinder unit connected to the muzzle seat and including a striking cylinder, at least one storage chamber that is adapted for storing pressurized air, and a sealing cap that is coupled to the striking cylinder and the at least one storage chamber. The electric nail gun further includes an air valve disposed in the cylinder unit and being directly and solely movable by the safety component from a closed position to an open position to allow the pressurized air to flow into the striking cylinder, and a nail-striking unit driven movably by the pressurized air for striking a nail when the air valve is at the open position.

A tool for working a substrate, having a stator and a working piston, which is intended to move relative to the stator along a working axis, and having a drive, which is intended to drive the working piston along the working axis from a starting position onto the substrate, the drive having a stator coil arranged on the stator and being intended to apply electrical current of a first current intensity I.sub.1 to the stator coil in order to generate a magnetic field which accelerates the working piston relative to the stator, the drive having a piston coil arranged on the working piston and being intended to apply electrical current of a second current intensity I.sub.2 to the piston coil in order to generate a magnetic field which accelerates the working piston relative to the stator, the second current intensity I.sub.2 being less than the first current intensity I.sub.1.

A tool for working a substrate, having a stator and a working piston, which is intended to move relative to the stator along a working axis, and having a drive, which is intended to drive the working piston along the working axis from a starting position onto the substrate, the drive having a stator coil arranged on the stator and being intended to apply electrical current of a first current intensity I.sub.1 to the stator coil in order to generate a magnetic field which accelerates the working piston relative to the stator, the drive having a piston coil arranged on the working piston and being intended to apply electrical current of a second current intensity I.sub.2 to the piston coil in order to generate a magnetic field which accelerates the working piston relative to the stator, the second current intensity I.sub.2 being less than the first current intensity I.sub.1.

A powered fastener driver includes a first cylinder, a first piston positioned within the first cylinder, a second cylinder in fluid communication with the first cylinder, and a second piston positioned within the second cylinder. The first piston is moveable between a top-dead-center position and at or near a bottom-dead-center position and the second piston is moveable between a top-dead-center position and a bottom-dead-center position to initiate a fastener driving cycle. A drive blade is coupled to the second piston for movement therewith and a drive mechanism is configured to drive the first piston between the top-dead-center position and at or near the bottom-dead-center position. The drive mechanism includes a crank arm that rotates less than 360 degrees for moving the first piston from at or near the bottom-dead-center position and the top-dead-center position and then back to at or near the bottom-dead-center position to complete the fastener driving cycle.