Patent ID: 8011741

Claim:
A flap drive system for driving a flap movably mounted on a body of a piece of furniture, said flap drive system comprising: a mechanical actuating unit including: a housing having a base to be fastened to the body of the piece of furniture and having a covering plate apart from and opposing said base; an actuating arm to be connected to the flap, said actuating arm being arranged between said base and said covering plate of said housing; and an energy accumulator for acting on said actuating arm, said energy accumulator being arranged between said base and said covering plate of said housing; an electric drive including an electric motor and a base plate detachably fastened to said covering plate of said actuating unit; and an interface between said electric drive and said actuating unit, said interface being configured to transmit driving force from said electric motor to said actuating arm when said base plate of said electric drive is detachably fastened to said covering plate of said actuating unit, wherein said electric drive is configured to be detachably fastened to said actuating unit without disassembling said actuating unit when said actuating unit is already mounted to the body of the piece of furniture.