The invention concerns a driving tool comprising a motor, in particular, an electric motor, a gas spring with an elastically compressible gas volume, and a firing piston, wherein the gas spring can be tensioned via a tensioning device with the motor, so as to accelerate after a release from a tensioned state the firing piston in a firing direction, wherein at least one part of the tensioning device is located within the gas volume of the gas spring.

A fastener driving tool is provided which performs driving only when a trigger lever is turned ON following a push lever. The fastener driving tool includes a sleeve valve driving a driver blade, and in the sleeve valve, supply and exhaust of compressed air are controlled by a trigger valve. The trigger valve includes a valve piston movable between an air-supply position where the valve piston causes an opening part and a communication port to communicate with each other and blocks an exhaust port, and an exhaust position where the valve piston blocks the opening part and causes the exhaust port and the communication port to communicate with each other, and a plunger movable between a communication position where the plunger causes compressed air in a pressure accumulation chamber to be supplied to a pressure chamber and a shutoff position where the plunger shuts off communication between the pressure accumulation chamber and the pressure chamber and causes air in the pressure chamber to be exhausted. When a trigger and a push lever are in striking stop positions, the plunger is driven to a communication position by a trigger arm.

A portable linear fastener driving tool is provided that drive staples, nails, or other linearly driven fasteners. The tool uses a gas spring principle, in which a cylinder filled with compressed gas is used to quickly force a piston through a driving stroke movement, while a driver also drives a fastener into a workpiece. The piston/driver is then moved back to its starting position by use of a rotary-to-linear lifter, and the piston again compresses the gas above the piston, thereby preparing the tool for another driving stroke. The driver has protrusions along its edges that contact the lifter, which lifts the driver during a return stroke. A pivotable latch is controlled to move into either an interfering position or a non-interfering position with respect to the driver protrusions, and acts as a safety device, by preventing the driver from making a full driving stroke at an improper time.

A pneumatic or hydraulic mechanism has a housing defining a piston chamber and having a fluid inlet port. A piston is slidable in the piston chamber. The piston partitions the piston chamber into a front chamber and a rear chamber. The piston has one or more passages for fluid communication between the rear chamber and the front chamber, the one or more passages being sealed by a sealing mechanism. The sealing mechanism has a sealing state in which the sealing mechanism substantially inhibits fluid communication between the rear chamber and the front chamber, and a non-sealing state in which the sealing mechanism allows fluid communication between the rear chamber and the front chamber. The piston is slidable between a first position and a second position. When the piston is positioned in the first position, the sealing mechanism is in the sealing state. Upon supply of a fluid to the inlet port, the fluid urges the piston to its second position and then causes the sealing mechanism to change to the non-sealing state until the pressure in the rear chamber and the front chamber equalises, allowing the sealing mechanism to return to the sealing state. Upon removal of fluid from the rear chamber, the fluid in the front chamber urges the piston to return to its first position.

Various embodiments of the present disclosure provide powered fastener driving tools and clean lubricants for powered fastener driving tools that reduce contaminant, residue, and deposit buildup or accumulation in the powered fastener driving tools, and thus reduce necessary maintenance for such powered fastener driving tools (or increases the time intervals between such necessary maintenance of powered fastener driving tools).

A power tool includes a tool housing and a mechanism disposed inside the tool housing. The tool housing has a composite structure that includes an outer layer and an inner layer. The outer layer provides an outer surface of the power tool housing and comprises a first material. The outer layer is an assembly of concave shell portions joined along parting lines. The inner layer is disposed on an inner surface of at least a portion of the outer layer so as to be disposed between the portion of the outer layer and the mechanism. The inner layer comprises a second material. The first material has a density that is at least three times the density of the second material. The inner layer has a peripheral edges that are offset relative to the parting lines such that the inner layer extends continuously across the parting lines.

A pneumatic powered fastener driving tool including a housing including a main compartment and a handle extending from the main compartment and an end plug removably attachable to the handle, the end plug including a mounting base attachable to a bottom section of the handle, a pneumatic connector receiver extending outwardly from the mounting base, a belt hook receiver extending outwardly from the mounting base, and a mounting bracket extending downwardly from the mounting base. The tool further includes a belt hook with limited rotation. The present disclosure also provides the fastener driving tool end plug removably attachable to a handle of a pneumatic powered fastener driving tool and a limited rotation belt hook attachable to the pneumatic powered fastener driving tool end plug.

A fastener driving apparatus comprises an energy storage means, a drive mechanism, and an anvil assembly. The drive mechanism selectively engages the energy storage means to store potential energy within the energy storage means. After the drive mechanism disengages, potential energy previously stored within the energy storage means impart a force on the anvil assembly to launch the assembly (and incorporated anvil) to drive a fastener. The drive mechanism may comprise a cam for engaging and disengaging the energy storage means. The apparatus may also comprise a nail indexing mechanism for supplying fasteners, which indexing mechanism may also be acted and operated on by the cam. The apparatus may further comprise a gas spring as a return mechanism for returning the anvil assembly to a position after the anvil assembly has separated from the energy storage means.

A hand tool for mechanically generating and delivering a driving force to a fastener. The hand tool includes a mechanical force delivery system that is structured and operable to mechanically generate and deliver a driving force to a fastener. The hand tool additionally includes a pneumatic actuation device that is operatively connected to the mechanical force delivery system. The pneumatic actuation device is structured and operable to actuate the mechanical force delivery system such that the mechanical force delivery system mechanically generates and delivers the driving force.

The present invention discloses a pneumatic nail gun, which comprises a nail tool body, a cylinder seat arranged above the nail tool body, a housing cap arranged at top end of the cylinder seat; a seal gasket is arranged inside top of the housing cap; a head valve is arranged inside the housing cap, and a spring is disposed inside the head valve; a collar is actively arranged inside the cylinder seat, a cylinder being disposed inside the cavity of the tool body; the collar can move reciprocally along a space formed between the cylinder seat and the inner step surface of the cylinder; a control valve assembly is arranged along a radical direction of the cylinder seat; a piston driver assembly is actively arranged inside a chamber being formed by an inner hole of the collar and an inner hole of the cylinder. The pneumatic nail gun can reduce the pressure oscillation when firing, increase the effectiveness of the firing for every time.