Patent ID: 7334667
Filing Date: 2008-02-26
Classification: B60G,B60T

Abstract:
1. Actuation device ( 1 ) provided with at least one actuator ( 5 ) acting on a actuation mechanism ( 2 ), comprising at least one pusher element ( 8 ) for activating a first operating group comprising a pump ( 12 ), and a hydraulic circuit ( 13 ) and a rotating element ( 53 ) that moves between an activation mode, in which it acts on a second operating group ( 9 , 10 ), and a rest mode where the activation of said first operating group comprising the pump ( 12 ), and the hydraulic circuit ( 13 ) is disengaged from said second operating group comprising a cable ( 9 ), and a braking element ( 10 ) of a rear parking brake, said actuation device comprising at least one elastic means ( 50 , 51 ) interposed between said pusher element ( 8 ) and said at least one actuator ( 5 ) in order to keep the said actuation device ( 1 ) constantly charged wherein said at least one actuator ( 5 ) acts on a toothed sector ( 26 ) by means of a drive shaft ( 24 ) and a toothed pinion ( 25 ) and said at least one elastic means includes at least one pair of helicoidal springs ( 50 , 51 ), responsible for the activation of said pusher element ( 8 ) and a shaft ( 7 ), on which the toothed sector ( 26 ) acts and said toothed sector ( 26 ) is held fast one of the pair of helicoidal springs and transmits the movement to said pump ( 12 ) by means of said pusher element ( 8 ) and said toothed sector ( 26 ) is held fast an other of the pair of helicoidal springs ( 51 ) and when the rotating element ( 53 ) is in said activation mode, transmits movement to an acting element ( 6 ) through said shaft ( 7 ) to activate said cable ( 9 ) and said braking element ( 10 ) of a rear wheel parking brake.