Patent ID: 7284511

Claim:
A combustion-engined setting tool for driving fastening elements in a constructional component, comprising: a combustion chamber ( 13 ) for combusting a gas mixture; an inlet/outlet device ( 40 ) for opening the combustion chamber ( 13 ) and having a first position in which the combustion chamber is open, and a second position in which the combustion chamber ( 13 ) is closed, the inlet/outlet device ( 40 ) having valve means for reversibly displacing the inlet/outlet device ( 40 ) between the first and second positions thereof; locking means ( 37 ) for locking the valve means of the inlet/outlet device ( 40 ) in the second position of the inlet/outlet device ( 40 ); a trigger ( 30 ) for actuating the locking means ( 37 ); a release switch ( 22 ) for triggering ignition in the combustion chamber ( 13 ); an electronic control unit ( 20 ) for controlling start of the ignition in the combustion chamber ( 13 ), the release switch ( 22 ) being connected with the control unit ( 20 ); and an initialization switch connected with the control unit ( 20 ), the control unit ( 20 ) initializing the ignition in the combustion chamber ( 13 ) when a time period between switching-on of the initialization switch and switching-on of the release switch ( 22 ) does not exceed a predetermined set time period.