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:
Aug. 19, 2014
Filed:
Dec. 12, 2007
Alfred J. Chiesa, Farmington Hills, MI (US);
Hank J. Knott, Ypsilanti, MI (US);
David E. Lenhart, Jr., Pomeroy, OH (US);
Branko Cvetkovic, Ontario, CA;
Alfred J. Chiesa, Farmington Hills, MI (US);
Hank J. Knott, Ypsilanti, MI (US);
David E. Lenhart, Jr., Pomeroy, OH (US);
Branko Cvetkovic, Ontario, CA;
GKN Sinter Metals, LLC, Auburn Hills, MI (US);
Abstract
A method and apparatus for forming a powder metal forging (B) includes a die set (AD) for forming the powder metal forging (B) having a first die (A) complementary with a second die (D) in a longitudinal direction (ZC). The die set (A,D) has at least two features () of dimensions with a longitudinal component () and a lateral component (), and at least the lateral component () varies along the longitudinal direction (ZC), at least one such feature () in each die (A,D). Each of the first die (A) and the second die (D) includes a castellated parting interface () dissecting the laterally varying internal longitudinal feature () in the first die from the laterally varying feature () in the second die (D). The castellation () in the dies (A,D) provides forged powder metal parts (B) with features of opposite drafts without trapping the part (B) in the dies (A,D).