Patent ID: 6216924
Filing Date: 2001-04-17
Classification: B22D

Abstract:
A pressure cast tube for conducting molten metal from a vessel to a casting, said tube comprising:a tube body having an intake end and a mold end with an outer surface between said intake end and said mold end, said tube body defining an internal passageway between said intake end and said mold end, said tube body having a cross-sectional dimension that is greater at longitudinal positions adjacent to said mold end than at longitudinal positions adjacent to said intake end, said tube body also forming a flange ring that is located at a longitudinal position adjacent to the mold end of said tube body, said flange ring defining a radial surface that is located laterally outwardly with respect to the outer surface of said tube body that is adjacent to said flange ring, said flange ring also defining at least one lateral side between the radial surface and the outer surface of the tube body that is adjacent to said flange ring, said lateral side including a radial edge with a first portion of the lateral side being located on one side of the radial edge and between the radial edge and the outer surface of the tube body that is adjacent to said flange ring, said lateral side also including a second portion that is located on the opposite side of the radial edge from the first portion and defining a recess, the first portion of the lateral side cooperating with the vessel to form a metal-to-refractory seal at times when the pressure cast tube is placed in the vessel,a shell that is secured to said tube body adjacent to said mold end, said shell including an outer band that is secured to the radial surface of the flange ring; anda contact ring that is connected to the outer band of said shell, saidcontact ring being received in the recess of the second portion of said lateral side.