A fluid damper includes a cylinder tube portion which is filled with a fluid and a piston which is provided so as to be movable in an inner portion of the cylinder tube portion and whose moving speed is controlled with resistance of the fluid. Area of a flow path through which the fluid passes is changed with a temperature.

A driving tool having a trigger, such that after the trigger is on-operated, a contact restriction member starts to rotate to a lock side while rotation resistance is applied thereto by a rotation resistance applying member. A lock portion enters a lock receiving portion to prohibit an on-operation of a contact arm after a reference time has passed after the on-operation of the trigger. As a result, an inadvertent driving operation can be prevented. A mechanical timer mechanism allows for a timer control to be effected under an environment where electric power cannot be supplied.

A driving tool drives a fastener by a striking mechanism which is operated by a fluid. The driving tool includes a trigger, a contact arm, a contact lever and a regulator. The trigger and the contact arm receive manipulations and the contact lever switches operating states of the striking mechanism according to operations of the trigger and the contact arm. The regulator switches operating states of the contact lever according to the contact arm. The regulator includes a regulation member and a controller. The regulation member regulates the contact lever at an operation standby position where the contact lever is operated by the contact arm. The controller operates the regulation member and includes first and second cylinders. The first cylinder operates the regulation member. The second cylinder to which a fluid operating the striking mechanism is partially supplied and generates a driving force for driving the first cylinder.

A driver includes: a pressure chamber and a striking portion actuated in a direction of striking a fastener when compressed gas is supplied to the pressure chamber, and can select a single firing and a continuous firing; a switching mechanism having a first actuated state to actuate the striking portion in the direction when the single firing is selected and a second actuated state to block the striking portion from being actuated in the direction when the continuous firing is selected; and a control unit configured to switch the switching mechanism from the first actuated state to the second actuated state when a predetermined time elapses in a state where the continuous firing is selected and the switching mechanism is in the first actuated state. The control unit stops the power supply to the switching mechanism for at least part of a period of time when the predetermined time elapses.

A driving tool includes a driving mechanism which is driven with a fluid and which is configured to drive a fastener supplied to a nose portion and a clocking mechanism configured to perform clocking of a time period for switching between presence and absence of actuation of the driving mechanism. The clocking mechanism is supplied with a fluid for actuating the driving mechanism, moves a moving member from an initial position to a clocking starting position where clocking is started by force of the fluid, and performs clocking by controlling movement of the moving member by applying a load of resistance when the moving member moves from the clocking starting position to the initial position thereof.

A fluid damper includes a cylinder tube portion which is filled with a fluid, a piston which is provided so as to be movable in an inner portion of the cylinder tube portion and whose moving speed is controlled with resistance of the fluid, and a biasing member which expands and contracts in accordance with a position of the piston and which applies a force corresponding to an expansion and contraction amount of the biasing member to the piston. The resistance of the fluid at a time the piston moves is changed in accordance with the position of the piston.

A nail gun includes a gun body, a power module, a muzzle module and an operation module. The muzzle module includes a contact arm resiliently maintained at a normal position. The operation module includes a transmission unit and a trigger unit. The transmission unit includes a transmission member that is connected to the contact arm. The trigger unit includes a trigger member, a trigger arm and a switch member. The trigger arm is mounted in the trigger member, and abuts against the transmission member when the trigger member is not depressed. The switch member is operable to move between a sequential firing position and a repetitive firing position.

A clinch fastener mechanism including a pivoting base configured to be pivotally connected to a pneumatic fastener tool. The clinch fastener mechanism further includes a clinch arm pivotally connected to the pivoting base at a proximal end of the clinch arm; and a clinch plate disposed on a distal end of the clinch arm, wherein tool operates within three pressure zones. The system may also include a two-valve system which works by moving pressure throughout three specific zones. The first pressure zone has pressure introduced to it by the user attaching the tool to a pressure delivery source, such as a compressor, or other source. The second pressure zone may be used to operate the clinch arm or a safety mechanism. Mechanical safeties may be configured to prevent accidental or double firing of the tool.

A driving tool drives a fastener supplied to a nose using a striking mechanism. The driving tool includes a trigger, a contact arm, a contact lever and a regulator. The trigger receives a manipulation which operates the striking mechanism. The contact arm reciprocates and receives another manipulation which operates the striking mechanism. The contact lever operates according to operations of the trigger and the contact arm and switches operating states of the striking mechanism. The regulator regulates a movement of the contact lever in a range from an operable position where the striking mechanism is operable by the contact lever to an operation standby position where the contact lever is operable by the contact arm, according to a reciprocating movement of the contact arm, and switches operating states of the contact lever according to the contact arm.

A compressed air nailer comprises a control line configured to trigger a driving process when a valve pin is displaced relative to a valve sleeve into an actuated position. The valve sleeve is configured to move between a triggering position and a locked position. A switching surface is coupled to at least one of a trigger and a placing sensor and configured to actuate the valve pin. An outer sleeve is configured to guide the valve sleeve. The switching surface is positioned at a switching surface position relative to the outer sleeve when both the trigger and the placing sensor are actuated. The switching surface is configured to displace the valve pin into the actuated position when the valve sleeve is positioned in the triggering position. The switching surface does not displace the valve pin into the actuated position when the valve sleeve is positioned in the locked position.