Patent ID: 7984610

Claim:
A hydrodynamic machine having an operating state and a non-operating state, the hydrodynamic machine comprising: a primary wheel having blades and a secondary wheel having blades, each of said primary wheel and said secondary wheel being arranged opposite each other axially and said blades of said primary wheel and said blades of said secondary wheel being configured to jointly form a working chamber; wherein said primary wheel and said secondary wheel are configured for one of transmitting torque from said primary wheel to said secondary wheel by means of a circulatory flow of a working medium in said working chamber during the operating state and preventing a transmission of torque from said primary wheel to said secondary wheel by means of emptying said working medium from said working chamber in a non-operating state; a suction apparatus being integrated in the hydrodynamic machine, said suction apparatus including a revolvable blade wheel having a circumferential direction, a plurality of blades being arranged in the circumferential direction of said blade wheel and one of behind one another on one of said primary wheel and said secondary wheel and adjacent to one of said primary wheel and said secondary wheel, and a shaft at least one of carrying and driving at least one of said primary wheel and said secondary wheel, said blade wheel being driven by one of said primary wheel, said secondary wheel, and said shaft; wherein said suction apparatus is in fluidic connection with said working chamber, said suction apparatus being configured to suck off at least one of a working medium and air from said working chamber forming a negative pressure in said working chamber in the non-operating state; and a duct having an inlet end opening into said working chamber, said duct including at least one interruption in the circumferential direction of said blade wheel, said blades of said blade wheel being arranged opposite said duct capable of producing a conveying effect in said duct and generating a negative pressure at said inlet end.