Propeller and system of counter-rotating propellers comprising improved means for limiting pitch, and a turbine engine comprising them

A propeller for an aircraft turbine engine, comprising a propeller rotor, blades borne by said rotor, and adjustment means for adjusting the pitch of said blades, said adjustment means comprising at least one double acting hydraulic actuator borne by a said rotor and including at least one cavity and a corresponding piston housed and displaceable in said cavity for causing modification of the pitch angle of said blades, said piston dividing said cavity into two chambers, said adjustment means further comprising limitation means for limiting the stroke of each piston of each aforementioned actuator for preventing displacement of said blades into a predetermined direction, corresponding to a displacement of the piston in a direction orientated from a second chamber towards a first chamber of the cavity housing said piston, beyond a predetermined limiting pitch angle,

• wherein said limitation means comprise hydraulic connection means allowing both chambers of each cavity of each aforementioned actuator to be put into fluidic communication with each other as soon as the pitch angle of said blades becomes equal to said predetermined limiting pitch angle during a displacement of said blades into said predetermined direction, said hydraulic connection means being borne by said rotor of the propeller.