Hydraulic dual control device for bicycle

A bicycle dual control device (1) comprising:

• a housing cover (60), a first supporting member (17) attached to a bicycle handlebar (0) with a mounting member (50);
• a first unidirectional control unit (FCU) (10), configured to operate a first control mechanism through a first control circuit (14), comprising a first operating member (16) linked to the first control circuit (14) and operated by a first acting element (11) to be operated with the hand or fingers of a cyclist, and a first coupling assembly (15) which links said first operating member (16) with said first acting element (11), therefore the first acting element (11) pivots around a first pivot axis (B) of said first supporting member (17) orthogonal to a riding plane of the bicycle;
• and a second unidirectional control unit (SCU) (20), configured to operate a second control mechanism through a second control circuit (24), comprising a second operating member (26) linked to the second control circuit (24) and operated by a second acting element (21) to be operated with the hand or fingers of the cyclist, and a second coupling assembly (25) which links said second operating member (26) with said second acting element (21);
• characterized in that:
• the second unidirectional control unit (20) is hydraulic and it is integrated inside the first acting element (11),
• and the second operating member (26) comprises a master cylinder of the second unidirectional control unit (22) mounted into the body of the first acting element itself (11) and a master piston of the second unidirectional control unit (23) reciprocating within said master cylinder of the second unidirectional control unit (22) and biased by means of a return spring of the second unidirectional control unit (28), being the second acting element (21) coupled to the master piston of the second unidirectional control unit (23) through the second coupling assembly (25) that pushes said master piston of the second unidirectional control unit (23) inside said master cylinder of the second unidirectional control unit (22).