Removable closure for an opening in an aluminum refining pot
AssigneesMichael J. McDonald, Ben N. McDonald
InventorJames Barrett McDonald
Life of this patent
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Abstract
A closure is made of a flexible fabric material designed to withstand a temperature in the range of 1800.degree. F. as is present within a pot employed to conduct the Hall-Heroult process for deriving aluminum from alumina. The closure, in a preferred embodiment, includes an elongated hook allowing it to be hung over the opening of the pot and also includes a gripping handle allowing the closure to be manipulated. A peripheral bulbous seal enhances the sealing effect about the opening in the pot.
Claims15
In a pot for conducting a process for deriving aluminum from alumina, including a chamber having an access opening, the improvement comprising a closure for said opening including:
- a) attachment means for attaching said closure over said opening;
- b) said closure having a flexible body made of heat resistant fabric and sized to overlie said opening;
- c) said body having a bulbous peripheral seal sealing about a periphery of said opening, said seal comprising a peripheral portion of said fabric folded upon itself and fastened together to form a pocket and a rope seal within said pocket.
A closure for an opening, comprising:
- a) attachment means for attaching said closure over said opening comprising a laterally elongated hook body at a top edge of said closure engageable over an upper termination of a surface peripheral to said opening;
- b) said closure having a flexible body made of heat resistant fabric and sized to overlie said opening;
- c) said body having a peripheral seal sealing about a periphery of said opening.
Dependencies are inferred from the claim text.