Hilti Aktiengesellschaft

Thomas Granacher

Ulrich Schiestl

Iwan Wolf

Hans Gschwend

Ulrich Rosenbaum

Walter Odoni

Franz Büchel

Andreas Klima

A slip clutch () for a hand-held power tool () that serves to uncouple a tool socket () from a driving motor () in the event of an overload is provided. An annular running surface () has cams () projecting radially inward. The slip clutch () has a set of pairs consisting of a preloaded coil spring () and a pawl (). The coil spring () presses a head () of the pawl () in the radial direction outward onto the running surface (). The pawl () has a sheet-metal strip () whose one section is bent into a hollow prism that is annularly closed, except for a gap, in order to form the head (). An insert () is placed into the gap () so as to fill the gap ().

Power tool

The invention relates to a combustion driven working tool having a combustion chamber (), a piston () guided in a cylinder (), an ignition system for igniting a fuel supplied to the combustion chamber () for driving the piston () and a fan () at least for ventilating the combustion chamber (). The running time and/or the speed of the fan () can be set as a factor of a measured temperature to realize a combustion driven working tool where an optimal ignition behavior can be set under changing working conditions, in particular under conditions of changing external temperature. A combustion chamber temperature is measured by a first temperature sensor () arranged on the combustion chamber () and supplied to a control unit (), which calculates the cooling time and/or the speed for the fan () as a factor of the measured combustion chamber temperature and supplies these values to the motor (). A second temperature sensor () is utilized for measuring the external temperature for the calculation of the cooling time or the speed of the fan ().

Temperature-controlled fan delayed shut-off

A pressure container with an outer container () and a constantly deformable or compressible inner container is arranged within the outer container (), whose container wall is constructed of a metallic foil. A fill material chamber () for fill material () is arranged in the inner container () and in the outer container (), a propellant chamber () is formed for propellant (), which are separated from one another in a fluid- and/or gas-tight manner. The pressure container is furthermore provided with a cover part () for sealing the containers (), on which a valve part () is arranged for dispensing fill material () from the fill material chamber () to the outside. For improving the pressure container it is proposed that a compensation body () be provided in the inner container () for the purpose of compensating volume variations in the fill material chamber ().

Pressure container

An expanding gas-operated setting tool for driving fastening elements, such as nails, bolts, pins, etc., into a substrate, includes a housing ( ), a setting mechanism ( ), located in the housing ( ) for driving the fastening element into a substrate, electrical consumers at the setting tool ( ), the source of power comprising a fuel cell ( ), which is mounted on the setting tool for supplying power to electronic components of the setting tool and which can be operated with fuel in a fuel reservoir ( ), which is mounted on the setting tool ( ), and with oxygen.

Growing community of inventors

Schaan, Liechtenstein

Thomas Granacher