Patent ID: 6543549
Filing Date: 2003-04-08
Classification: B25B,B25F,Y10S

Abstract:
An electrically driven hand-held tool, comprising a housing (2; 12; 22; 32) having a plurality of air suction openings (6; 16; 26; 36), and electromotor (20; 30; 40), a gear set for transmitting rotation of an output shaft of the electromotor to a drive spindle, and a fan-wheel all arranged in the housing (2; 12; 22; 32), the fan-wheel providing, during operation of the tool, for aspiration of air through the suction openings (6; 16; 26; 36), for directing the aspirated air past the electromotor and the gear set for cooling same, and for expelling warm air, which was heated as a result of absorbing heat generated by the electromotor and the gear set during the operation of the tool, out of the housing (2; 12; 22; 32); and means for directing the warm air out of the housing (2; 12; 22; 32); the directing means comprising a warm air channel (7; 17; 27; 37) arranged downstream of the electromotor and the gear set and spaced from a tool handle (3; 13; 23; 33) and having a plurality of blow-out openings (8; 18; 28; 38) arranged in such a way that during use of the hand-held tool, the expelled warm air flows in a direction away from the tool operator.