Abstract: A fastening element is provided, comprising a shank, which defines a driving-in direction, the shank having a front end, facing in the driving-in direction, and a rear end, facing counter to the driving-in direction, the shank having a periphery having a profile ridge that is inclined in relation to the driving-in direction at an acute angle. According to one aspect, the profile ridge has a front flank, facing in the fastening direction, and a rear flank, facing counter to the fastening direction, the front flank having a greater area content than the rear flank. According to a further aspect, the fastening element has a tip region, which has a convex portion.

Abstract: The invention relates to a fastener driving tool comprising a tank (5) for storing a fuel, in particular liquefied petroleum gas, a combustion chamber (2) connected to the tank (5), wherein the combustion chamber (2) has a movable piston for powering a driving plunger, and a metering device (4) arranged between the tank (5) and the combustion chamber (2) wherein a defined quantity of fuel can be transported by means of the metering device (4) from a metering space (12) into the combustion chamber (2), wherein the metering device (4) comprises a thermomechanical element (15) by means of which the defined amount can be varied as a function of a temperature.

Abstract: The invention concerns a fastener driving tool comprising a tank for storage of a fuel, in particular liquefied gas, a combustion chamber connected to the tank, a piston that is movable in a cylinder for driving a driving ram, and at least one exhaust gas opening for ejection of exhaust gases after an ignition of a fuel/air mixture, where the development of the gas pressure of the combustion chamber is selectably reducible compared to a maximum pressure development, in order to affect a driving energy of the piston through the ejection, where, if a driving energy is reduced, the maximum pressure development after the ignition is applied over a first segment of travel of the piston.

Abstract: The invention concerns a driving apparatus comprising a tank (5) for storage of a fuel, in particular a liquefied gas, a combustion chamber (3) connected to the tank (5) via a valve element (6), where the combustion chamber (3) has a movable piston (3a) to drive a driving ram, and an ignition device (11) to ignite an air-fuel mixture in the combustion chamber (3), where in the combustion chamber an evaporation element (8) is provided, where injection of the fuel is aimed at the evaporation element (8).

Abstract: The invention relates to a fastener driving tool comprising a tank (5) for storing a fuel, in particular liquefied petroleum gas, a combustion chamber (2) connected to the tank, wherein the combustion chamber (2) has a movable piston for powering a driving plunger, and a metering device (4) arranged between the tank (5) and the combustion chamber (2), wherein a defined quantity of fuel can be transported by means of the metering device (4) from a metering space (12) into the combustion chamber, wherein the metering device (4) comprises an electric stepper motor (15) by means of which the defined amount can be varied as a function of a temperature.

Abstract: The invention relates to a fastener driving tool comprising a tank (5) for storing a fuel, in particular liquefied petroleum gas, a combustion chamber (2) connected to the tank (5), wherein the combustion chamber (2) has a movable piston for powering a driving plunger, and a metering device (4) arranged between the tank (5) and the combustion chamber (2) wherein a defined quantity of fuel can be transported by means of the metering device (4) from a metering space (12) into the combustion chamber (2), wherein the metering device (4) comprises a thermomechanical element (15) by means of which the defined amount can be varied as a function of a temperature.