Abstract: A transmission joint with a coupling having frontal teeth (20,21) is inserted between an output shaft of a gear motor and a worm screw. A release element is associated in a radial way to the coupling so that the coupling can be manually released in an emergency. The release element includes an eccentric pin that engages the coupling element in a radial way so that the coupling element can be moved from an engagement position to a release position by being turned by a lock barrel (26) with its key.

Abstract: The invention concerns a command and release device for an electrical actuator for swing gates, that includes a transmission joint comprised of a coupling with frontal teeth (20,21) inserted between the output shaft of gear motor and a worm screw (14) and a release element (24). This element is associated in a radial way to the said coupling so that it can be manually released in an emergency. The release element is comprises an eccentric pin that engages the coupling element in a radial way that can be moved from an engagement position to a release position by being turned by a lock barrel (26) with its key.

Abstract: The invention concerns an ceiling electromechanical actuator for up-and-over and sectional doors. It comprises a guide profile (11), a sliding block or carriage (12) moving along the guide profile and connected to the door to be controlled, and an electrical gear motor (19) to control the opening and closing movements of the door by means of a transmission chain (13). The transmission chain (13) has one end (13′) attached to the sliding block or carriage (12), turns on said sprocket (18) driven by a gear motor (19) and returns, with a free end section (13″) in the guide profile (11) in a direction parallel to the movement of said sliding block or carriage.