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:
Nov. 09, 2010
Filed:
Aug. 11, 2006
Robert Weiss, Batavia, IL (US);
Stephen Bangs, North Auirora, IL (US);
James Engdahl, Oswego, IL (US);
Paul Fecteau, St. Charles, IL (US);
Robert Weiss, Batavia, IL (US);
Stephen Bangs, North Auirora, IL (US);
James Engdahl, Oswego, IL (US);
Paul Fecteau, St. Charles, IL (US);
Burgess - Norton Mfg. Co., Inc., Geneva, IL (US);
Abstract
A method is provided for cold forming center web or webless tapered piston pins in one forming sequence. The method eliminates secondary operations such as but not limited to machining, annealing, coating and secondary forming. The method includes the steps of cutting a metal rod into a substantially cylindrical slug piece, die extruding the slug piece to form a first cavity in the slug piece, optionally die extruding the slug piece to form a second cavity in the slug piece, piercing the slug piece to form the slug piece into a hollow cylindrical piece, die extruding the hollow cylindrical piece at either end to form a hollow cylindrical piece having a taper on an internal surface of the hollow cylindrical piece at either end.