Patent ID: 8579326
Filing Date: 2013-11-12
Classification: B60S

Abstract:
1. An extensible support leg comprising at least two reciprocally-slidable portions ( 20 , 21 ), a maneuvering screw ( 5 ) axially constrained to a first portion ( 20 ) of the portions ( 20 , 21 ), a threaded volute ( 4 ) axially constrained to a second portion ( 21 ) of the portions ( 20 , 21 ) and screwed on the maneuvering screw ( 5 ), and a rotating drive shaft ( 8 ) which is connected to the maneuvering screw ( 5 ) by means of a mechanical gear change ( 70 , 71 , 80 , 81 , 86 ), and is destined to be rotated in order to set the maneuvering screw ( 5 ) in rotation, the mechanical gear change ( 70 , 71 , 80 , 81 , 86 ) further comprises: two first cogged crown wheels ( two second cogged crown wheels ( a cursor (