| 摘要 |
Motor-drive device for the electrical operation of the frame of the moving leaf (casement) of windows, bays or doors of the sliding type, characterised in that it comprises an electrically driven geared-motor unit (A) which is seated in the base of the central upright (mullion) (1) of one of the two, fixed or moving, leaves and on the output shaft (18) of which is keyed a gearwheel (23) which projects laterally beyond the abovementioned upright in order to cooperate with a rack (24) fastened to the lower longitudinal member of the opposite leaf. <IMAGE> |
