The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 1994
Filed:
Apr. 14, 1993
Applicant:
Inventors:
Gene S Miller, Maryville, TN (US);
Dennis R Raines, Maryville, TN (US);
Joseph C Preston, Louisville, TN (US);
Assignee:
Aluminum Company of America, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65G / ;
U.S. Cl.
CPC ...
406193 ; 138172 ; 138174 ;
Abstract
A transport duct for carrying abrasive materials, such as ceramic powders. The duct comprises an outer casing and an axially extending array of alternating ceramic and polymer segments each having an interior wall defining a passageway. The transport duct is useful for transporting streams of alumina powder to an aluminum electrolysis cell and for other uses where abrasion resistance and avoidance of internal material buildup are important.