C - Chemistry – Metallurgy – 25 – C
Patent
C - Chemistry, Metallurgy
25
C
204/203
C25C 3/14 (2006.01) B25D 17/02 (2006.01)
Patent
CA 2025499
Abstract A crust breaker device being used to break crusts of alumi- nium electrolysis cells, comprises a driven unit with a bar, for instance a piston-/sylinder device with a piston rod (7). The rod is provided for axial movement, essentially in the vertical direction, and to the lower part of the rod is connected a cutter bar or crow bar (5) which is designed to be moved through the crust and make a hole therein. The cutter bar (5) is connected to, but electrically isolated from the rod (7) by means of a cast connection (1,3,4,6).
Fetherstonhaugh & Co.
Norsk Hydro A.s
Sagbraten Alf
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