A mechanical timer mechanism can include a driven gear mounted to a rotary damper and a drive gear operably coupled to the driven gear. In bump mode, movement of a trigger to its firing position can initially move the drive gear into its wind-up position. Thereafter, a contact trip can move the drive gear to its wind-up position and an actuator of the trigger to its firing position each time the contact trip is activated, unless the timing mechanism has timed out between firings. In sequential mode, the drive gear can be moved into a timer lock-out position which holds the contact trip in a bypass position in which the contact trip will not engage the actuator of the trigger unless the trigger is moved to its firing position prior to activation of the contact trip.

A fastener driver includes a housing defining a handle portion, a magazine in which fasteners are held, a nosepiece for receiving fasteners from the magazine, a driver blade movable from a ready position toward a driven position during which a fastener positioned in the nosepiece is driven into a workpiece, a lifting mechanism operable to return the driver blade from the driven position toward the ready position for a subsequent fastener driving operation, and a drivetrain to provide torque to the lifting mechanism. At least a portion of the drivetrain is positioned within and extends through the handle portion of the housing.

A fastener-driving tool has a housing including a combustion chamber, where the combustion chamber generates combustion for driving a fastener, and a processor associated with the housing and in communication with the combustion chamber. The processor is configured to cause an initial combustion in the combustion chamber and cause a fastener to be driven when a first actuation event and a second actuation event occur, and is configured to cause at least one subsequent combustion in the combustion chamber and cause at least one additional fastener to be driven when only the first actuation event occurs.

Various embodiments of the present disclosure provide a battery-powered stapling tool.

A fastener driver including a main housing, 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 cylinder housing containing a pressurized gas, and a piston movable relative to the cylinder housing and biased by the pressurized gas from a retracted position toward a driven position. The cylinder housing is displaceable along a longitudinal axis of the piston relative to the main housing and away from the drive blade, while the piston remains stationary relative to the main housing, to reduce the pressure of the pressurized gas within the cylinder housing.

A fastening tool includes a contact trip operatively associated with a contact trip switch to enable a fastener drive system to be fired when the contact trip reaches a firing position, after having engaged a work surface. If a dry-fire condition exists in a magazine connected to the fastening tool, the movement of the contact trip is completely taken up or absorbed by a biasing agent so that the contact trip switch is not closed. The biasing agent also limits the amount of force that can be applied to the contact trip switch in the event an operator slams the contact trip against a work surface or drops the fastening tool nose-first onto an unyielding surface.

A pneumatic tool is provided comprising: a motor; a drive mechanism connected to the motor; a cylinder; the drive mechanism comprising a drive bar connected to a piston, the drive bar adapted to drive the piston in a linear direction; the cylinder filled with high pressure gas; wherein the piston is housed in the cylinder and adapted to reciprocate within the cylinder; the piston is connected to a striking member adapted to strike a workpiece; wherein the drive mechanism further comprises a plurality of latching members adapted to be in contact with and lock the drive bar. The latching structure provided by the present invention has a smaller sliding distance and is safer than conventional drive bar latching structures.

A fastening tool having a low nail lockout mechanism pivotably mounted to the magazine assembly that prevents the tool from driving a fastener with there are less than a predetermined number of fasteners in the magazine.

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 fastener driver includes a housing, a cylinder supported by the housing, and a moveable piston positioned within the cylinder. A driver blade is attached to the piston and movable therewith between a top-dead-center position and a driven or bottom-dead-center position. The driver blade includes a body having a first side and an opposite, second side with the driving axis passing therebetween, a plurality of teeth extending from the first side of the body, and a plurality of projections extending from the second side of the body. The body and the projections are bisected by a common plane. The teeth extend at an oblique angle from the first side of the body relative to the common plane.