Abstract: This assembly includes a security apparatus equipping a lifting device, in particular a winch, and a system for actuating the apparatus The security apparatus includes a toothed wheel, wedged on the shaft of the lifting device, and a worm meshing with the toothed wheel. The assembly also includes: a splined shaft secured to one end of the worm; a pocketed wheel with inner and outer splines, engaged on the splined shaft; an elastic member between the pocketed wheel and a stop piece; a drive wheel with a splined hub, with which the pocketed wheel is capable of engaging rotationally; and a back-up motor, capable of rotating the drive wheel.

Abstract: This assembly includes a security apparatus equipping a lifting device, in particular a winch, and a system for actuating the apparatus The security apparatus includes a toothed wheel, wedged on the shaft of the lifting device, and a worm meshing with the toothed wheel. The assembly also includes: a splined shaft secured to one end of the worm; a pocketed wheel with inner and outer splines, engaged on the splined shaft; an elastic member between the pocketed wheel and a stop piece; a drive wheel with a splined hub, with which the pocketed wheel is capable of engaging rotationally; and a back-up motor, capable of rotating the drive wheel.

Abstract: This safety system includes: a toothed wheel, connected rotationally with respect to at least one rotating member to be braked, a worm driven rotationally by a motor upon rotation of the rotating member and permanently in mesh with the toothed wheel, a housing forming: a longitudinal wall located on the side of the worm diametrically opposed to the toothed wheel, and extending along the worm at a distance of the latter ranging between 0.001 and 0.01 times the diameter of the worm, and a first end wall integral with the longitudinal wall, located opposite a first longitudinal end of the worm; and energy absorption/dissipation elements interposed between the first end wall and the first longitudinal end of the worm, the worm being slidingly mounted in the housing such that the first longitudinal end of the worm comes closer to the first end wall when the worm slides in the housing.

Abstract: This safety system includes: a toothed wheel, connected rotationally with respect to at least one rotating member to be braked, a worm driven rotationally by a motor upon rotation of the rotating member and permanently in mesh with the toothed wheel, a housing forming: a longitudinal wall located on the side of the worm diametrically opposed to the toothed wheel, and extending along the worm at a distance of the latter ranging between 0.001 and 0.01 times the diameter of the worm, and a first end wall integral with the longitudinal wall, located opposite a first longitudinal end of the worm; and energy absorption/dissipation elements interposed between the first end wall and the first longitudinal end of the worm, the worm being slidingly mounted in the housing such that the first longitudinal end of the worm comes closer to the first end wall when the worm slides in the housing.

Abstract: This safety system (S) is adapted to be used with a mechanism having one or several turning members (34), and comprises a toothed wheel (6), connected in rotation with at least one turning member (34) to be braked, and a worm (8), driven in rotation by a motor (5) during rotation of the turning member (34), this worm (8) being in permanent engagement with the toothed wheel (6). The worm (8) is contained within in a bore formed in a housing, this bore being delineated by a continuous wall of the housing extending all along the worm (8) outside the area facing the toothed wheel (6) and having a diameter such that said wall is in the immediate vicinity of the peripheral edges of the threads of the worm (8).

Abstract: This braking system (S) is adapted to be used with a mechanism having one or several turning members (34), and comprises a toothed wheel (6), connected in rotation with at least one turning member (34) to be braked, and an endless screw (8), driven in rotation by a motor (5) during rotation of the turning member (34), this screw (8) being in permanent engagement with the toothed wheel (6). The screw (8) is contained in a bore of a diameter slightly greater than that of the screw (8).

Abstract: This braking system (S) is adapted to be used with a mechanism having one or several turning members (34), and comprises a toothed wheel (6), connected in rotation with at least one turning member (34) to be braked, and an endless screw (8), driven in rotation by a motor (5) during rotation of the turning member (34), this screw (8) being in permanent engagement with the toothed wheel (6). The screw (8) is contained in a bore of a diameter slightly greater than that of the screw (8).