Temperature controlled hydraulic coupling with moveable dam

摘要

A hydraulic coupling of the temperature responsive type and particularly adapted to couple the engine to the radiator fan of an internal combustion engine. The specific improvement resides in a dam adjacent the dump hole. The dam is pivotable so as to assume either of two angular positions upon assembly of the coupling. One angular position of the dam accommodates relative rotation of the drive rotor and coupling housing in one direction, the other angular position of the dam accommodating such relative rotation in the other direction. Further, by virtue of its pivoting action the dam can contact the periphery of the drive rotor.