Non-backdriving actuator for opening and closing a window sash

Details Non-backdriving actuator for opening and closing a window sash Non-backdriving actuator for opening and closing a window sash

E - Fixed Constructions

05

F

268/44

E05F 11/02 (2006.01) E05F 11/16 (2006.01) E05F 11/34 (2006.01)

Patent

CA 1323884

NON-BACKDRIVING ACTUATOR FOR OPENING AND CLOSING A WINDOW SASH Abstract of the Disclosure A shaft of a window actuator is operable to open and close a casement window sash when the shaft is rotated either by a hand crank or by a motor from inside of the premises. The shaft is automatically locked against rotation if a backdriving force is applied to the actuator from outside the premises. This prevents an open sash from being buffeted by wind and from being pulled open further by a potential intruder.

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