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:
Oct. 26, 2004
Filed:
Aug. 06, 2002
Applicant:
Inventors:
Narsimhan Raghunathan, Beverwijk, NL;
J. Daniel Bryant, Murrysville, PA (US);
Andrew J. Hinkle, Murrysville, PA (US);
Assignee:
Alcoa Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21C 2/324 ; B22D 1/900 ;
U.S. Cl.
CPC ...
B21C 2/324 ; B22D 1/900 ;
Abstract
A method of operating a twin wheel conform metal extrusion device or a cladding extrusion device for producing a composite of an extruded metal shell bonded to a metal foam core. A metal feedstock is extruded through an extrusion die defining a cavity housing a hollow extrusion mandrel to produce a metal shell. Liquid foam of a second metal is simultaneously delivered through the hollow mandrel bore such that the foam exiting the axial bore is metallurgically bonded to the metal extruded through the cavity.