Method of making a hollow metal piston having elastic strip cast

Details Method of making a hollow metal piston having elastic strip cast Method of making a hollow metal piston having elastic strip cast

1989-10-02

1991-10-15

Gorski, Joseph M.

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

29888047, 2988805, B23P 1510

Patent

active

050562185

ABSTRACT:
A light metal piston for internal combustion engines has a pair of inserts on the inside of upper piston skirt made of a material of lower thermal expansion coefficient than that of the light metal, such as steel. Each insert has a pair of bands which are joined by a connecting portion of the insert in the region of the gudgeon pin boss. Each band extends circumferetially away from the gudgeon pin boss, so as to control thermal expansion of the piston skirt. A free end of each band are bent inwardly, so that the insert can be set firmly on the mold core of the piston during casting operation by snapping the bent portions of the insent into the grooves on the mold core.

REFERENCES:
patent: 1731904 (1929-10-01), Nelson
patent: 1770818 (1930-07-01), Summers
patent: 4074617 (1978-02-01), Cockcroft
patent: 4776075 (1988-10-01), Kawabata et al.

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