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:
Mar. 02, 1993
Filed:
Dec. 13, 1991
Applicant:
Inventor:
Gene L Oliver, Birmingham, AL (US);
Assignee:
American Cast Iron Pipe Company, Birmingham, AL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22D / ; B22D / ;
U.S. Cl.
CPC ...
164118 ; 164457 ; 164458 ;
Abstract
In a process for centrifugal casting metal pipe in a metal mold in which the mold is cooled by the application of cooling water to the external surface, the application of cooling water is interrupted for a time just prior to the pouring of molten metal to a time generally corresponding to the time of separation of the pipe being cast from the inner surface of the mold to thereby permit limited dilation of the mold and reduce tensile stress in the external portion of the mold.