Patent ID: 7191847

Claim:
A drive for a motor-driven hand-held tool ( 10 ) having reciprocating drive means ( 30 ) for a driving a working tool ( 15 ), the drive comprising a motor ( 17 ); and a gear mechanism ( 20 ) for converting a rotational movement of the motor ( 17 ) into a reciprocating movement of the reciprocating drive means ( 30 ), the gear mechanism ( 20 ) having a transmission element ( 23 ) axially secured on a support ( 21 ) with a support member ( 26 ) and including a first eccentric take-off element ( 24 ) cooperating with the reciprocating drive means ( 30 ) for imparting the reciprocating movement thereto, a mass-balance member ( 31 ) guiding the reciprocating drive means ( 30 ) in said reciprocating movement, and a second eccentric take-off element ( 25 ) cooperating with the mass-balance member ( 31 ) for imparting reciprocating movement thereto, the support member ( 26 ) forming a slide support surface for the mass-balance member ( 31 ).