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:
Sep. 21, 1993
Filed:
Feb. 24, 1992
William M Goldberger, Columbus, OH (US);
Superior Graphite Co., Chicago, IL (US);
Abstract
The present invention is directed generally to apparatus for and improvements in powdered metal consolidation processes, some of which referred to as 'electroconsolidation' processes, and more particularly to processes employing specially shaped rams or electrodes and/or other press elements for imparting uniformity of electrical flux and/or pressure to a workpiece. Some embodiments of the improved process of the present invention contemplate controlling the degree of compaction by providing rams which generally conform to the shape of the preform. Such projections may be provided on the rams to selectively develop at least one zone of relatively high compaction within the die chamber, which results in certain embodiments associated with the electroconsolidation process in release of the major portion of the electrical energy within the zone having a relatively high degree of compaction. Moreover, at least one member of a selected shape may be inserted within the die chamber for modifying the electrical resistivity pattern thereof.