A driving device includes an operable striking unit, a piston upper chamber configured to operate the striking unit by gas pressure, a housing, a head cap provided in the housing, a passage provided in the head cap, and an exhaust valve operably provided in the housing and configured to open and close the passage. The exhaust valve includes a contact portion and a non-contact portion, the contact portion comes into and out of contact with the head cap on an outer side of the passage in a radial direction of the passage, the non-contact portion is provided on an inner side of the contact portion in the radial direction of the passage, and the non-contact portion is provided at a position separated from the head cap in a state where die contact portion is in contact with the head cap.

An air-path structure of pneumatic a nail gun, formed inside a gun body containing high-pressure air, comprises a main air chamber, a firing valve air chamber and a time-delayed air chamber that continuously releases the high-pressure air to the atmosphere. The gun body is configured with a trigger valve and a slider valve. The inside of the trigger valve is formed with a safety-on air chamber and a safety-off air chamber. The trigger valve controls the high-pressure air inside the firing valve air chamber to be discharged to the atmosphere. The slider valve controls the high-pressure air inside the main air chamber flowing toward the firing valve air chamber, the time-delayed air chamber and the safety-off air chamber. Specifically, the safety-on air chamber is constantly communicated with the main air chamber and constantly contains high-pressure air, and the slider valve can control the high-pressure air inside the safety-off air chamber flowing into the time-delayed air chamber. In this way, the invention can improve the operating safety of conventional pneumatic nail guns.

A driving tool without necessary to secure an arrangement space dedicated to an actuator is provided. A driving tool includes: a striking unit movable to strike a fastener; a housing for supporting the striking unit; a trigger provided in the housing; a push lever provided in the housing, and a trigger valve, and the driving tool further includes: a slide member provided in the trigger; and a solenoid provided in the trigger and configured to move the slide member.

An electric nail gun includes a cylinder unit, a nail-striking unit and a valve unit. The cylinder unit includes a striking cylinder that surrounds a first axis and that defines a cylinder chamber, and a cylinder lid that cooperates with the striking cylinder to define a gas storing chamber communicating with the cylinder chamber. The cylinder lid includes a passage that communicates with the gas storing chamber, and that extends along a second axis. The nail-striking unit includes a piston assembly that is adapted for striking a nail. The valve unit includes a valve assembly that is accommodated in the passage. The valve assembly is operable to convert between a first state, in which the gas is allowed to flow between the gas storing chamber and an external environment through the passage, and a second state, in which the gas is refrained from flowing through the passage.

A fastener driver includes a drive blade movable from a retracted position to a driven position for driving a fastener into a workpiece and a gas spring mechanism for driving the drive blade from the retracted position to the driven position. The gas spring mechanism includes a piston movable between a retracted position and a driven position. The fastener driver further includes a first return mechanism for moving the drive blade from the driven position toward the retracted position, and a second return mechanism for moving the piston from the driven position toward the retracted position.

A pneumatic tool includes a drive mechanism configured to be actuated by a pneumatic pressure of compressed air, a body housing having the drive mechanism embedded therein, a grip housing connected to the body housing, and an electromagnetic valve configured to control supply of the compressed air to the drive mechanism, wherein the electromagnetic valve is arranged on an opposite side to the body housing, as seen in an extension direction of the grip housing.

A driving tool without necessary to secure an arrangement space dedicated to an actuator is provided. A driving tool includes: a striking unit movable to strike a fastener; a housing for supporting the striking unit; a trigger provided in the housing; a push lever provided in the housing, and a trigger valve, and the driving tool further includes: a slide member provided in the trigger; and a solenoid provided in the trigger and configured to move the slide member.

A fastener driver includes a drive blade movable from a retracted position to a driven position for driving a fastener into a work piece. The fastener driver further includes a gas spring mechanism for driving the drive blade from the retracted position to the driven position. The gas spring mechanism is moveable between a retracted state and a driven state. The fastener driver further includes a first return mechanism for moving the drive blade from the driven position toward the retracted position, and a second return mechanism for returning the gas spring mechanism toward the retracted state separately from movement of the drive blade.

A gas-spring fastener driving tool has a working cylinder and a pressurized main storage chamber to hold the gases that will drive the cylinder's piston and driver combination. An end cap is placed on the upper (back) end of the pressure chamber, above the cylinder, with a set of seals and a set of fasteners; the fasteners can be removed by a user—one at a time—to safely release the stored gas pressure from the tool, for maintenance or repair of the interior parts. The end cap includes a fill valve positioned along the side of the working cylinder which allows ‘refilling’ gases to flow through passageways in the end cap, then into the working cylinder and pressure chamber, thereby bringing the tool up to its nominal working pressure. In some embodiments, the fill valve can also act as a pressure release valve.

Various embodiments of the present disclosure provide a powered-fastener-driving tool including driver blade that has a varying cross-section.