Wallace-murray Corporation

Henry Joseph Spence

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 rolling dam adjacent the dump hole which connects the outer portion of the drive chamber containing the drive rotor with a shear liquid reservoir passageway. The dam rolls between two abutments carried by the housing cover so as to assume either of two positions with respect to the dump hole. One position of the dam relative to the dump hole accommodates relative rotation between the drive rotor and coupling housing in one direction, the other position of the dam relative to the dump hole accommodating such relative rotation in the other direction. The rolling dam automatically moves to the proper position relative to the dump hole upon either direction of relative rotation between the drive rotor and coupling housing.

Rolling dam temperature controlled hydraulic coupling

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.

Temperature controlled hydraulic coupling with moveable dam

A shear liquid coupling of the temperature controlled type for driving the cooling fan of the radiator of an internal combustion engine. The specific improvement resides in the use of a separate tube for returning drive shear liquid from a zone adacent the drive rotor periphery to the shear liquid reservoir. The use of such a separate tube obviates the need of drilling (or casting) a return shear liquid passage in the coupling. Further, the use of such a separate tube permits operation in either direction of fan rotation.

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Indianapolis, IN, United States of America

Henry Joseph Spence