Patent ID: 7155904

Claim:
A hydrodynamic converter having a rotational axis, the converter comprising: a pump wheel having a pump outlet edge and allowing flow of a medium therethrough; a turbine wheel in fluid communication with the pump wheel and allowing flow of the medium therethrough, the turbine wheel having a turbine inlet edge; first guide blades positioned between the pump wheel and the turbine wheel along a flow-path of the medium; second guide blades positioned between the turbine wheel and the pump wheel along the flow-path; a speed ratio for a speed of the turbine wheel with respect to a speed of the pump wheel of above 1; an input power of the pump wheel being constant or decreasing at rising turbine speed and constant pump speed; and the pump outlet edge being positioned along a radius R, the turbine inlet edge being positioned along a radius r, and the radius R being between 2 and 8 times radius r.