The invention relates to a nail passage mechanism used for a nail gun. The nail passage mechanism comprises a muzzle member having a nail hole, a muzzle cover disposed above the muzzle member, a nail passing channel formed between the muzzle member and the muzzle cover permitting a striking member to pass therethrough for striking a nail. The muzzle cover comprises a clearance groove permitting more than one tooth blocks located on the striking member to pass therethrough, and the clearance groove locates on a first side of the nail passing channel.

A nail gun for repeatedly driving nails into a substrate includes a drive assembly having a longitudinal axis, a feed head assembly attached to the drive assembly and configured to provide the nails to an output segment, a hammer configured to reciprocate along the longitudinal axis of the drive assembly to drive the nails into the substrate, and a reservoir assembly configured to provide compressed air to the drive assembly to reciprocate the hammer and drive the nail into the substrate. A method drives nails into a substrate with the nail gun.

A fastener delivery tool may comprise a sheath assembly having at least one position retention member proximate a distal end of the sheath assembly, and a handle assembly coupled to a proximal end of the sheath assembly, the handle assembly comprising a housing, a trigger handle, and an insert connector. An external force applied to the trigger handle may cause displacement of the trigger handle relative to a rest position, and displacement of the trigger handle from the rest position within a first displacement range may impart a first amount of force on the insert connector relative to the applied external force and displacement of the trigger handle from the rest position within a second displacement range may impart a second amount of force on the insert connector relative to the applied external force, with the first amount of force being greater than the second amount of force.

A fastener tool that drives a fastener into a workpiece includes a housing, a driver, a motor, a flywheel, an actuator, and a controller. The motor is configured to be in either its energized state or its deenergized state. The actuator is configured to move the driver into engagement with the flywheel. The controller is operatively connected to the motor and the actuator to implement a firing sequence for driving the fastener in the drive channel into the workpiece. The controller is configured to i) control the actuator to initiate a drive engagement between the driver and the flywheel, and ii) control the motor to remain in its energized state while the flywheel is in the drive engagement with the driver transmitting the energy from the flywheel to the driver so as to move the driver along the drive axis.

A fastener delivery tool may comprise a sheath assembly having at least one position retention member proximate a distal end of the sheath assembly, and a handle assembly coupled to a proximal end of the sheath assembly, the handle assembly comprising a housing, a trigger handle, and an insert connector. An external force applied to the trigger handle may cause displacement of the trigger handle relative to a rest position, and displacement of the trigger handle from the rest position within a first displacement range may impart a first amount of force on the insert connector relative to the applied external force and displacement of the trigger handle from the rest position within a second displacement range may impart a second amount of force on the insert connector relative to the applied external force, with the first amount of force being greater than the second amount of force.

The invention relates to a nail passage mechanism used for a nail gun. The nail passage mechanism comprises a muzzle member having a nail hole, a muzzle cover disposed above the muzzle member, a nail passing channel formed between the muzzle member and the muzzle cover permitting a striking member to pass therethrough for striking a nail. The muzzle cover comprises a clearance groove permitting more than one tooth blocks located on the striking member to pass therethrough, and the clearance groove locates on a first side of the nail passing channel.

A nail gun for repeatedly driving nails into a substrate includes a drive assembly having a longitudinal axis, a feed head assembly attached to the drive assembly and configured to provide the nails to an output segment, a hammer configured to reciprocate along the longitudinal axis of the drive assembly to drive the nails into the substrate, and a reservoir assembly configured to provide compressed air to the drive assembly to reciprocate the hammer and drive the nail into the substrate. A method drives nails into a substrate with the nail gun.

A staple apparatus can comprise a staple head movable in a first staple direction from a head retracted position to a head extended position. The staple apparatus can further comprise an indexing apparatus comprising an index biasing member and an indexing member. The indexing member can be positioned at least partially within an indexing area and biased with the index biasing member toward a member extended position relative to the indexing area. The indexing member can define a rung travel path and can further comprise an indexing tab comprising a ramp surface positioned to taper the rung travel path in the first indexing direction. The indexing tab can further comprise a shoulder positioned past at least a portion of the ramp surface in the first indexing direction. In further embodiments, a staple chain positioning apparatus can comprise a push member movable in an extension direction.