Abstract: A combustion-engined setting tool for driving fasting elements such as nails, bolts, pins in an object, includes a combustion chamber (13), a fuel source (11), a fuel conduit (12) connecting the fuel source (11) with combustion chamber (13) for feeding fuel thereinto, and at least one metering device (30) for metering a predetermined amount of fuel for effecting a setting process and having at least one variable volume metering chamber (31), and a displaceable piston body (34) for a pulsed ejection of fuel from the metering chamber (31).

Abstract: A method of controlling operation of a portable, combustion-engined, power tool and including feeding fuel into the combustion chamber of the power tool, before ignition, several times one after another in accordance with an intermittent metering operational mode, and a power tool including a control device (34, 64) for controlling operation of the fuel feeding device (32, 33) of the power tool so that the feeding device (32, 33) feeds the fuel into the combustion chamber (1) several times in accordance with the intermittent metering operational mode.

Abstract: A setting tool assembly for driving fastening elements in constructional components includes a combustion energy-operated setting tool (10), a fuel source (11), a metering head (20) for metering a predetermined amount of liquid fuel or gaseous fuel stored in the fuel source (11) into the combustion chamber (12) of the setting tool (10), the metering head (20) having an inlet (23) communicating with the fuel source (11), at least two outlets (42, 52, 62, 72), and at least two metering valves (40, 50, 60, 70) which connect the inlet (23) with respective outlets and which have different volumes of metering chambers (41, 51, 61, 71), and a device for selectively connecting the outlets of the metering head (20) with the combustion chamber (12).

Abstract: A combustion energy-operated setting tool for driving in fastening elements includes a setting piston (13) displaceable in a guide chamber (11) by reaction gases of a fuel, a bolt guide (20) for receiving and guiding the fastening elements and adjoining the guide chamber (11) in a setting direction, with the bolt guide (20) having a first region (21) with an inner diameter (D1) and a second region (21), extending in a direction toward an end (24) of the bolt guide (20) remote from the guide chamber (11), and having an inner diameter (D2) smaller than the inner diameter (D1) of the first region (21).

Abstract: A combustion-engined setting tool for driving fasting elements such as nails, bolts, pins in an object, includes a combustion chamber (13), a fuel source (11), a fuel conduit (12) connecting the fuel source (11) with combustion chamber (13) for feeding fuel thereinto, and at least one metering device (30) for metering a predetermined amount of fuel for effecting a setting process and having at least one variable volume metering chamber (31), and a displaceable piston body (34) for a pulsed ejection of fuel from the metering chamber (31).

Abstract: A method of controlling operation of a portable, combustion-engined, power tool and including feeding fuel into the combustion chamber of the power tool, before ignition, several times one after another in accordance with an intermittent metering operational mode, and a power tool including a control device (34, 64) for controlling operation of the fuel feeding device (32, 33) of the power tool so that the feeding device (32, 33) feeds the fuel into the combustion chamber (1) several times in accordance with the intermittent metering operational mode.