Patent ID: 8137023
Filing Date: 2012-03-20
Classification: F16D,Y10T

Abstract:
1. A coupling assembly for connection between a drive shaft and an impeller in a molten metal pump, said coupling assembly comprising: a coupling body defining an upper portion dimensioned to for receiving an end of a motor drive shaft, and a lower portion dimensioned for receiving an end of an impeller shaft, an interior stepped portion providing a first stop for the end of the impeller shaft, said lower portion having first and second aligned apertures receiving a pin member to secure the impeller shaft to the coupling body, wherein said first aperture is an axially elongated slot, said pin member includes a handle portion, a driver member, a second stop, and a cylindrical portion having a length that is longer than a diameter of the coupling body, and wherein said second stop is adjacent said driver member and is dimensioned larger than said first aperture, said driver member having an elongated configuration sized and shaped to pass through the first aperture of the coupling body and includes a flat surface that engages said wall surface to transmit torque, and wherein said driver member has a greater cross-sectional area than said cylindrical portion of said pin member.