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:
Jan. 11, 2005
Filed:
Oct. 17, 2001
Carmo Ribeiro, Ann Arbor, MI (US);
Richard R. Gofton, Chelsea, MI (US);
Hongsheng Lin, Ann Arbor, MI (US);
Randall R. Gaiser, Chelsea, MI (US);
Carmo Ribeiro, Ann Arbor, MI (US);
Richard R. Gofton, Chelsea, MI (US);
Hongsheng Lin, Ann Arbor, MI (US);
Randall R. Gaiser, Chelsea, MI (US);
Federal-Mogul World Wide, Inc., Southfield, MI (US);
Abstract
A multi-axially forged mono-bloc piston includes a lower crown part forged of steel and including a pair of pin bosses and an integral skirt formed as one piece with the pin bosses. The lower crown part is friction welded to an upper crown part to form at least one closed oil gallery within the piston head. The lower crown part is forged in the longitudinal direction of the piston as well as laterally to impart longitudinal and laterally forged features of the piston. The laterally forged features may comprise undercut recesses formed in the piston skirt to reduce material in the overall piston structure. The lateral forging may also result in the piston skirt portion being discoupled from the piston head by laterally forged slots formed in the lower crown partbetween the skirt and head.