Servo drive for door

摘要

The door is driven by an electric servo motor (9) fitted to one end of a slim rectangular housing (1) which also contains the back-up batteries (11), the control circuit (10) and the power connections (12,13). The housing has a U-shaped cover and a flat base and is fitted in a vertical position to one side of the door opening or in a horizontal position on the upper support frame for an up and over door. The servo motor drives the door via a flexible belt or via a simple rack and pinion drive. A reduction gearing is included in the drive. The electric supply is via a socket and the unit is fitted with external controls and, if required, a remote control. The batteries provide failsafe operation in a power failure.