Patent ID: 7331252

Claim:
Braking system (S), intended to be fitted to a mechanism, with one or more rotating members ( 34 ), comprising a toothed wheel ( 6 ), connected rotationally with respect to at least one rotating member ( 34 ) to be braked, and a worm ( 8 ), driven rotationally by a motor ( 5 ) upon the rotation of the rotating member ( 34 ), this worm ( 8 ) being permanently in mesh with the toothed wheel ( 6 ); characterized in that the worm ( 8 ) is contained in a bore with a diameter close to that of the worm ( 8 ), wherein the system comprises specific energy absorption/dissipation means ( 10 , L, 12 ; 13 to 16 ; 19 to 21 ), in addition to the teeth of the wheel ( 6 ) and the thread of the worm ( 8 ), said specific energy absorption/dissipation means comprise a sliding mounting of the worm in the bore and energy absorption/dissipation means ( 10 , L, 12 ) associated with this worm ( 8 ) and actuated by it upon its sliding, said associated energy absorption/dissipation means comprise: a liquid (L) contained in the space delimited by at least one piston ( 8 a ), against which one end of worm ( 8 ) comes to bear, and the walls of the part ( 1 ) delimiting the bore, and one or more paths for this liquid (L) to escape upon the sliding of the worm ( 8 ), this or these paths having sections suitable for allowing the liquid (L) to escape only over a non-instantaneous time interval, said one or more paths comprise means ( 15 ) for adjusting the flow of liquid (L), and the means ( 15 , 61 , 62 ) for adjusting the flow rate of the liquid (L) comprise a ring ( 60 ) secured to the worm ( 8 ), a tubular member ( 61 ), engaged adjustably through this ring ( 60 ) and a rod ( 62 ) engaged adjustably in the tubular member ( 61 ), the tubular member ( 61 ) and the rod ( 62 ) having radial holes ( 67 , 68 , 73 , 74 ) communicating with each other, the rod ( 62 ) having grooves ( 76 ) extending in the circumferential direction and of variable depth, and being adapted to be disposed in a predetermined angular position relative to the tubular member ( 61 ).