Engine piston and metal mold

Details Engine piston and metal mold Engine piston and metal mold

1997-04-17

1998-06-30

Solis, Erick R.

Expansible chamber devices

Piston

With ported chamber in piston part for circulating heat...

123 4135, 1231936, F01P 104

Patent

active

057717761

ABSTRACT:
An engine piston comprises a piston main body including a piston head, and a cooling oil gallery in a form of a metal pipe integrally inserted in the piston head by a casting process of the main body. The oil gallery has an intermediate segment curved like an arc of a circle under the top surface of the piston, and first and second extensions extending from both ends of the intermediate segment, respectively, in the downward direction away from the top of the piston along the axis of the piston. This engine piston design facilitates the production process of the piston and reduces the manufacturing cost.

REFERENCES:
patent: 3314402 (1967-04-01), Tillack
patent: 3709109 (1973-01-01), Howe
patent: 3738335 (1973-06-01), Hoffmann
patent: 4206726 (1980-06-01), Johnson, Jr. et al.
patent: 4331107 (1982-05-01), Bruni
patent: 4907545 (1990-03-01), Mills
patent: 5081959 (1992-01-01), Akiyama

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