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 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 nail gun is provided with a wide and narrow nail switching and nail blocking structure provided with a nail rail. The nail gun includes a punching sheet guide rail vertically arranged in front of the nail rail, the punching sheet guide rail defining a positioning groove. One side of the positioning groove extends upwards to form a groove A in which a regulating block is arranged in a sliding manner, and another side of the positioning groove extends downwards to form a groove B in which a nail blocking bar is rotatably arranged through a pin shaft, wherein the nail blocking bar is capable of rotating between an initial position and a terminating position around the pin shaft. A spring sheet presses against the nail blocking bar. A toggle button is vertically arranged in front of the regulating block to selectively clamp and press against the regulating block.

A nail gun is provided with a wide and narrow nail switching and nail blocking structure provided with a nail rail. The nail gun includes a punching sheet guide rail vertically arranged in front of the nail rail, the punching sheet guide rail defining a positioning groove. One side of the positioning groove extends upwards to form a groove A in which a regulating block is arranged in a sliding manner, and another side of the positioning groove extends downwards to form a groove B in which a nail blocking bar is rotatably arranged through a pin shaft, wherein the nail blocking bar is capable of rotating between an initial position and a terminating position around the pin shaft. A spring sheet presses against the nail blocking bar. A toggle button is vertically arranged in front of the regulating block to selectively clamp and press against the regulating block.

Various embodiments of the present disclosure provide a combustion-powered fastener-driving tool including multiple combustion chambers and an exhaust gas recirculation system.

Various embodiments of the present disclosure provide a combustion-powered fastener-driving tool including multiple combustion chambers and an exhaust gas recirculation system.

The invention relates to a drive-in device, comprising a drive-in piston which is guided in a cylinder for driving a nail element into a workpiece and comprising a combustion chamber which is arranged over the drive-in piston and which can be filled with a combustion gas, said combustion chamber comprising a cylindrical portion which is symmetrical about a central axis (A). A movable combustion chamber wall of the combustion chamber can be adjusted along the central axis (A), and a spring is supported between the movable combustion chamber wall and a housing. A force vector (F) of the spring has a lateral offset (V) with respect to the central axis (A).

The invention relates to a drive-in device, comprising a drive-in piston which is guided in a cylinder for driving a nail element into a workpiece and comprising a combustion chamber which is arranged over the drive-in piston and which can be filled with a combustion gas, said combustion chamber comprising a cylindrical portion which is symmetrical about a central axis (A). A movable combustion chamber wall of the combustion chamber can be adjusted along the central axis (A), and a spring is supported between the movable combustion chamber wall and a housing. A force vector (F) of the spring has a lateral offset (V) with respect to the central axis (A).

The invention relates to a drive-in device, comprising a drive-in piston, guided in a cylinder, for driving a nail member into a workpiece, and a combustion chamber arranged above the drive-in piston, said combustion chamber being Tillable with a combustion gas, wherein the combustion chamber has a bottom that is adjustable along an axis, wherein the bottom has a groove that extends in the circumferential direction and has an inserted seal which bears in a radial direction against a rigid combustion-chamber wall, wherein a front surface, in the axial direction, of the seal protrudes in the direction of the axis from a terminating plane of the groove.