Engine piston and method for its manufacture
AssigneeMelco Engraving, Inc.
InventorsMelvin G. O'Dowd, Jeffrey Demmers, David Kulasa
Life of this patent
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Abstract
A piston for an internal combustion engine includes a textured, macroscopic, relief pattern on the inner and/or outer face of its skirt portion. The pattern improves heat transfer and oil flow, and decreases the weight of the piston, while maintaining or enhancing its strength. The pattern may be formed in the piston when it is molded, or it may be formed thereupon after molding by a chemical etch process.
Claims12
A piston for an internal combustion engine, said piston being configured as a hollow, generally cylindrical body which is open at one end, said piston comprising:
- a crown portion which defines the top wall of said piston;
- and
- a skirt portion which defines a side wall of said piston, said skirt portion having a macroscopic, textured, relief pattern defined upon at least a portion of an inner face thereof.
A piston for an internal combustion engine, said piston being configured as a hollow, generally cylindrical body which is open at one end, said piston comprising:
- a crown portion which defines the top wall of said piston;
- and
- a skirt portion which defines a side wall of said piston, said skirt portion having a macroscopic, textured, relief pattern defined upon at least a portion of a face thereof;
- said relief pattern also covering at least a portion of a bottom face of the crown portion.
Dependencies are inferred from the claim text.