Patent ID: 7426826
Filing Date: 2008-09-23
Classification: F16D

Abstract:
1. A hydrodynamic coupling or a hydrodynamic brake comprising: a pump impeller and a turbine wheel, which together form a torus-shaped working chamber, the pump impeller being seated on a drive shaft, and the turbine wheel being seated on a driven shaft; a shell that surrounds the pump impeller, the shell and the pump impeller forming a back-pressure chamber, which is in conveying connection with the torus-shaped working chamber; an inflow and an outflow for filling and draining the torus-shaped working chamber, wherein the drive shaft bears a back-pressure pump, which projects into the back-pressure chamber and which can be set in rotation around the drive shaft, wherein the back-pressure pump has an inlet in a radially outer region, wherein the back-pressure pump has a radially inner region that is joined to the outflow, and wherein the back-pressure pump and the drive shaft have a rotationally rigid connection therebetween, the rotationally rigid connection can be selectively made and/or released.