The Carborundum Company

Metaullics Systems Co., L.p.

Herbert L Ritchie, Jr

George S Mordue

Chris T Vild

A molten metal pump for transferring molten metal from a first vessel to a second vessel. The pump is constructed of a base member including a pumping chamber, a motor supported by at least one post, a rotatable shaft secured at a first end to said motor and at a second end to an impeller disposed within said pumping chamber. The pumping chamber includes an outlet to a first end of an elongated refractory tube having a longitudinal axis substantially parallel to the shaft. The tube has a second end passing through an opening in the platform. The tube includes a metallic cladding attached to an outer wall adjacent it's second end. A releasable fastening member is used to secure to the portion of the tube having the metallic cladding to the platform.

Molten metal transfer pump

A torque coupling system includes an impeller that is connected to one end of an impeller shaft without the use of threads. The connection is made by cement and dowels. A drive system for the shaft includes a hollow coupling into which the other end of the shaft can be fitted. The shaft includes longitudinally extending slots formed at its end. The coupling includes spaced, longitudinally extending keys adapted to be fitted into the slots formed in the shaft. The drive system also includes a torque limiter that is connected intermediate the coupling and a drive motor. If the drive motor is an electric motor, the motor can be provided with automatic shut-down circuitry that is activated in the event of a current/torque overload. Visual and aural alarms are provided to alert the user that a shut-down has occurred.

Torque coupling system

A torque coupling system includes an impeller that is connected to one end of an impeller shaft without the use of threads. The connection is made by cement and dowels. A drive system for the shaft includes a hollow coupling into which the other end of the shaft can be fitted. The shaft includes longitudinally extending slots formed at its end. The coupling includes spaced, longitudinally extending keys adapted to be fitted into the slots formed in the shaft. The drive system also includes a torque limiter that is conected intermediate the coupling and a drive motor. If the drive motor is an electric motor, the motor can be provided with automatic shut-down circuitry that is activated in the event of a current/torque overload. Visual and aural alarms are provided to alert the user that a shut-down has occurred.

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North Ridgeville, OH, United States of America

Herbert L Ritchie, Jr