Patent ID: 6440027
Filing Date: 2002-08-27
Classification: F16D,F16H,Y10T

Abstract:
A difference-in-speed-dependent hydraulic coupling comprising a rotating drive casing (2; 80), a hydrostatic displacement machine (7) arranged therein, an output shaft (3) and a friction clutch (6) for connecting the output shaft (3) to the drive casing (2; 80), the occurrence of a differential speed between the drive casing and the output shaft producing, in a pressure chamber (26; 85), a pressure which acts on the friction clutch (6), the pressure chamber being connected to a lower-pressure chamber via at least one valve, wherein there is provided a throttle valve (33) which is formed by a valve body (48) which is guided in a valve chamber (40), is supported on an element of temperature-dependent length (47) and has a control edge (51) which interacts with a control opening (55) of the valve chamber (40), the control opening (55) producing the connection between the pressure chamber (26; 85) and the lower-pressure chamber.