Engine piston assembly and forged piston member therefor having a cooling recess

Patent · Tue Sep 19 04:00:00 EDT 1989

OSTI ID:5375975

Cooper, B C; Erickson, K L; Green, J A; Nyez, D S

This patent describes a forged steel piston member for reciprocating movement in an engine. It comprises: an upper portion of substantially cylindrical shape and having a central axis, a top surface, a tubular wall depending from the top surface and having a peripheral groove adapted to receive a sealing ring, a lower end surface, and an inwardly facing wall surface extending upwardly from the lower end surface. The upper portion further includes an outwardly facing wall surface spaced radially inwardly from the inwardly facing wall surface and a downwardly facing transition portion blendingly associated with the inwardly and outwardly facing wall surfaces to collectively define an annular cooling recess, the transition portion being elevational spaced a relatively short distance from the top surface; and the inwardly facing wall surface being a machined surface of revolution about the central axis integral or one-piece forging.

• Assignee: Caterpillar, Inc., Peoria, IL
• Patent Number(s): US 4867119
• Application Number: PPN: US 7291429A
• OSTI ID: 5375975
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
COOLING
DESIGN
ENGINES
FABRICATION
FORGING
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS WORKING
PISTONS
STEELS