Patent ID: 7520414
Filing Date: 2009-04-21
Classification: B25C

Abstract:
1. A hand-held drive-in tool for driving fastening elements ( 60 ) in a workpiece (U), comprising a housing ( 11 ); a guide ( 12 ) located in the housing ( 11 ); a drive-in ram ( 13 ) displaceable in the guide ( 12 ) for driving in the fastening elements; a spring ( 31 ) for driving the drive-in ram ( 13 ); a tensioning device ( 70 ) for loading the driving spring ( 31 ) and including a motor ( 71 ) and a threaded spindle ( 76 ) rotatable by the motor ( 71 ); a locking device ( 50 ) for retaining, in a locking position thereof ( 54 ), the driving spring ( 31 ) in a loaded position thereof ( 33 ); an actuation switch ( 19 ) for displacing the locking device ( 50 ) from the locking position ( 54 ) of the locking device ( 50 ) to a release position thereof ( 55 ) in which the driving spring ( 31 ) is displaced from the loaded position thereof ( 33 ) to a release position thereof ( 34 ) for driving the drive-in ram ( 13 ); and a sliding nut ( 78 ) supported on the threaded spindle ( 76 ) without a possibility of rotation thereabout but with a possibility of an axial displacement therealong, the sliding nut ( 78 ) being axially displaceable, upon actuation of the motor ( 71 ) of the tensioning device ( 70 ) by a control unit ( 23 ) of the drive-in tool ( 10 ), between a first end position ( 83 ) and a second end position ( 84 ), and being displaceable, during a loading cycle, from the first end position ( 83 ) to the second end position ( 84 ) for displacing the driving spring ( 31 ) into the loading position ( 33 ) of the driving spring ( 31 ), and being subsequently displaceable form the second end position thereof ( 84 ) in the first end position thereof ( 83 ) to provide for displacement of the driving spring ( 31 ) to a release position thereof.