Patent ID: 7389974
Filing Date: 2008-06-24
Classification: B25J,F16H,Y10T

Abstract:
1. Transmission which includes a nut ( 6 ) turned by a motor ( 5 ), a screw ( 7 ) engaged in the nut, a means ( 10 , 11 ) of stopping the rotation of the nut and a cable ( 8 ) attached to the screw ( 7 ) and to which a device being driven ( 1 , 26 ) is attached, characterised by the fact that it is made up of a double pulley ( 14 ) with an axis of rotation that is fixed in relation to the motor, made up of an elementary pulley of large diameter ( 18 ) and an elementary pulley of small diameter ( 16 ), so that the cable is made up of two successive cable lines, one of which ( 12 ) is stretched between the elementary pulley of small diameter and the screw, and the other ( 20 ) stretched between the elementary pulley of large diameter and the device being driven.