Piston and method of manufacture

US6825450B2 · kind B2 · utility

Assignee

• Federal-Mogul Worldwide, Inc. · US

Inventors

• Carmo Ribeiro · Ann Arbor, US
• Thomas Egerer · Karben, DE
• Randall R. Gaiser · Chelsea, US

Key dates

• Filing date: Nov 4, 2003
• Grant date: Nov 30, 2004
• Expiry date: Nov 4, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02F2003/0061
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A piston particularly adapted for heavy-duty diesel engine applications is fabricated from separate parts having circumferentially extending joining surfaces that are heated prior to bonding to an elevated temperature sufficient to enable bonding of the joining surfaces, and thereafter the joining surfaces brought into contact with one another and twisted to attain a permanent metallurgical weld at the interface of the joining surfaces.