operated by screw-and-nut mechanisms

Full Title

Power-operated mechanisms for wings > using electrical actuators > using rotary electromotors > for vertically-sliding wings > for overhead wings > operated by screw-and-nut mechanisms

Classification Context

Section:

FIXED CONSTRUCTIONS

Class:

LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES

Subclass:

DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING