The invention relates to a driving device, comprising a hand-held housing having an energy transmission element accommodated therein for transmitting energy to a fastening element to be driven in, an exchangeable propellant charge and a combustion chamber arranged between the propellant charge and the energy transmission element, said combustion chamber extending about a central axis, wherein the combustion chamber is subdivided by means of a dividing member having a number of interruptions into a first subchamber adjoining the propellant charge and at least one second subchamber adjoining the energy transmission element, wherein an ejection region, enclosing a central axis, for the propellant charge is provided in the first subchamber, said ejection region extending between the propellant charge and a central region of the dividing member, wherein the ejection region is bounded at the central region of the dividing member by a closed surface of the dividing member.

The invention relates to a driving device, comprising a hand-held housing having an energy transmission element accommodated therein for transmitting energy to a fastening element to be driven in, an exchangeable propellant charge and a combustion chamber arranged between the propellant charge and the energy transmission element, said combustion chamber extending about a central axis, wherein the combustion chamber is subdivided by means of a dividing member having a number of interruptions into a first subchamber adjoining the propellant charge and at least one second subchamber adjoining the energy transmission element, wherein an ejection region, enclosing a central axis, for the propellant charge is provided in the first subchamber, said ejection region extending between the propellant charge and a central region of the dividing member, wherein the ejection region is bounded at the central region of the dividing member by a closed surface of the dividing member.

The invention relates to a hand tool machine for placing a nail having a push button that can be activate by a user for placing a nail. A combustion chamber is provided, in which a mixture of combustible gas and air can be ignited. In the combustion chamber, a piston is arranged in a movable manner in order to be accelerated by the combustion gases in the direction of placement. In the direction of placement, the piston has a punch protruding from the piston for driving the nail. A compressor compresses the air in the combustion chamber prior to igniting. The compressor has a fan wheel and an electric motor. At an operating speed of the electric motor, the fan wheel has a rotational speed of at least 2,000 rotations per second.

The invention relates to a hand-held machine tool for setting a nail, having a safety mechanism which can be actuated by a user and a button which can be actuated to trigger a setting of the nail. A mixture of flammable gas and air can be ignited in a combustion chamber. A piston is movably arranged in the combustion chamber in order to be accelerated in the setting direction by the combustion gases. There is a stamp on the piston for driving the nail. A compressor for compressing the air in the combustion chamber is directly connected to the combustion chamber via a channel. A valve which connects the channel or the combustion chamber to the environment is opened between the actuating of the safety mechanism and the actuating of the button.

The invention relates to a hand-held machine tool for setting a nail, having a safety mechanism which can be actuated by a user and a button which can be actuated to trigger a setting of the nail. A mixture of flammable gas and air can be ignited in a combustion chamber. A piston is movably arranged in the combustion chamber in order to be accelerated in the setting direction by the combustion gases. There is a stamp on the piston for driving the nail. A compressor for compressing the air in the combustion chamber is directly connected to the combustion chamber via a channel. A valve which connects the channel or the combustion chamber to the environment is opened between the actuating of the safety mechanism and the actuating of the button.

A nail-driving gun barrel assembly includes an axially extending barrel and an ejector. The barrel has a firing end portion having a cylindrical segment and a protruding segment that cooperates with the cylindrical segment to define a first cutout recess. The protruding segment is formed with a first groove. The ejector has a sleeve part and a projecting part which cooperates with the sleeve part to define a second cutout recess. The sleeve part is coaxially and slidably sleeved on the cylindrical segment. The projecting part is formed with a second groove. When the ejector is disposed at a first axial position, the first and second grooves mate each other.

A powered fastener driving tool such as a powder-actuated tool including a housing assembly including a side wall having a first outer section, a raised section, and a recessed section, the raised section including a rim that extends in an outermost plane of a side wall of the housing and a spring-loaded slidable power setting switch partially positioned in and partially extending from the housing. The spring-loaded slidable power setting switch includes a depressible button movable from a resting position in which an outer surface of the button extends outwardly beyond the plane in which the outer surface of the rim lies to a depressed position in which the outer surface of the button extends in a same or substantially same plane in which the outer surface of the rim lies.

An improved tool for installing an explosively driven fastener as well as an improved explosively driven fastener for use therewith are disclosed. The fastener includes a nail having a head with an explosive load attached thereto in a plastic cap that includes a buffer. The tool has a plurality of concentric cylinders and springs including a muzzle for receiving the fastener head and explosive load. A spring actuated firing pin ignites the load causing it to explode and drive the nail out of the tool. The explosion also automatically resets the tool. The tool and the fastener provide many advantages over existing explosively driven fasteners and the tools used to install them.

A vaporizer for a combustion tool comprising an inlet, an outlet, a first pressure regulator fluidly connected to the inlet, a second pressure regulator fluidly connected to the outlet, and an evaporator fluidly connected between the first pressure regulator and the second pressure regulator. The vaporizer is configured to receive, when in use, liquid and/or gaseous fuel from a fuel cartridge on the combustion tool through the inlet so that it goes through the first pressure regulator, then through the evaporator, and then through the second pressure regulator so that the gaseous fuel is delivered through the outlet at a substantially constant pressure.

A vaporizer for a combustion tool comprising an inlet, an outlet, a first pressure regulator fluidly connected to the inlet, a second pressure regulator fluidly connected to the outlet, and an evaporator fluidly connected between the first pressure regulator and the second pressure regulator. The vaporizer is configured to receive, when in use, liquid and/or gaseous fuel from a fuel cartridge on the combustion tool through the inlet so that it goes through the first pressure regulator, then through the evaporator, and then through the second pressure regulator so that the gaseous fuel is delivered through the outlet at a substantially constant pressure.