A compressed air nailer comprises a working piston connected to a driving tappet configured to drive a fastener. A trigger and a placing sensor are configured to be actuated to aerate or deaerate a main control line to enable triggering of the driving process. A control valve assembly is configured to define a locked position and an open position by controlling a first pressure in a first control space and a second pressure in a second control space. The first control space is connected to the trigger valve and actuation of the trigger valve is configured to bring the safety valve assembly into the locked position. When the safety valve assembly is in the open position, an actuation of the placing sensor valve is configured to bring the safety valve assembly into the open position when the trigger valve is actuated.

A compressed air nailer comprises a driving tappet connected to a compressed air supply and configured to drive in a fastener. A triggering apparatus is configured to trigger a driving process and a working piston is coupled to a driving tappet. A safety actuator is configured to be displaced between a locked position and an open position, wherein when in the locked position, the safety actuator is configured to inhibit the triggering of the driving process when an actuation of the triggering apparatus occurs. The compressed air nailer further comprises a throttle and a safety control chamber configured to be aerated and deaerated by the throttle. A counterforce generator is configured to generate a counterforce that acts on the safety actuator and is directed in an opposite direction from the actuating force. The counterforce is linearly dependent on an operating pressure of the compressed air nailer.

A combustion-powered fastener-driving tool that include a chamber member retainer assembly configured to enable the controller of the tool to prevent the chamber member of the tool from moving to an open unsealed position and to ensure the tool's combustion chamber remains sealed until the piston fully returns to its pre-firing position.

A combustion powered fastener driving tool including a combustion chamber ring configured to connect the combustion chamber to the cylinder head, the combustion chamber ring configured to reduce turbulence and velocity of vaporized fuel dispensed into the combustion chamber from the fuel cell.

A combustion powered fastener driving tool including a fuel cell receiving block shaped and sized to receive and engage a fuel cell adapter of a fuel cell, the fuel cell adapter shaped and sized to form a fluid tight seal with the fuel cell receiving block.

A combustion powered tool uses a fuel canister with a refillable hydrogen storage vessel containing metal hydride. The fuel canister includes a valve assembly with at least one valve to release hydrogen fuel gas. The valve assembly is removable from the refillable hydrogen storage vessel. A coupling device includes a first coupler attached to the refillable hydrogen storage vessel and a second coupler attached to the valve assembly. An outlet adapter is attached to the valve assembly to supply hydrogen fuel gas to the power tool.

A novel combustion chamber valve and fuel system for driven fastener hand tool is disclosed having a fuel pump disposed parallel to the combustion and piston chambers. Pressure applied a safety at the nose of the tool is activates the fuel pump in a common direction. Pressure applied on a trigger activates the valve system prior to firing in a common direction. The valve system employs a central shaft coupling three valves, an inlet valve using a novel wedged circumferential edge seal, a control valve using a novel edge circumferential seal with a ventilated support, and a charging exhaust valve using a face seal.

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.

A nailing depth adjustable air nail gun, including a gun head, a gun body, a clip device, a safety rack installed on the gun head, an adjusting mechanism and a trigger gear, the adjusting mechanism comprises a locating pin and an adjusting screw, the adjusting screw is located at the upper end of locating pin, the bottom of adjusting screw contacts the upper end of locating pin, the adjusting screw comprises a shaft and a head, a regulating wheel, a pressure spring, the pressure spring is fitted over the shaft, the gun head is provided with a limiting base corresponding to the regulating wheel, the limiting base has a strip bulge extending towards the regulating wheel, multiple strip slots matching the strip bulge are uniformly distributed on the outer wall of the regulating wheel, the strip bulge is stuck in the strip slot.

A lock member includes a fit portion, an inclined portion and a contacting portion. The fit portion is fitted with a projecting portion of a trigger to maintain an off-lock state. The inclined portion is brought into contact with a shaft of an unlock button and moves the lock member to release the off-lock state. The projecting portion is slidable on the contacting portion and maintains an on state.