Pyrotek Incorporated

Kristopher M Ratzlaff

Mark Palmer

Ronald E Gilbert

Charles Seale

Roger Kauffman

Robert D Dion

An impeller shaft assembly, coupler and molten metal pump are described, in which a coupling member is configured to be secured to a pump drive shaft and includes a socket part that is defined by a socket wall formed about and extending along an axis. The socket wall includes a plurality of coupling shaft engaging surfaces and a plurality of socket corner surfaces joining the shaft engaging surfaces. The socket corner surfaces are disposed radially outward from adjacent shaft engaging surfaces with respect to the axis.

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Spokane, WA, United States of America

Kristopher M Ratzlaff