The invention relates to a drive assembly (45, 46, 52) for a covering of an architectural opening, comprising a motor drive (52), an accumulator (54) connected to the motor drive, a power source (45) and an electrical circuit (55) connecting the power source to the accumulator. The electrical circuit...http://www.google.com/patents/US20020158595?utm_source=gb-gplus-sharePatent US20020158595 - Drive assembly for a covering of an architectural opening
