Two-piece piston assembly
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United States of America Patent
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-
May 26, 1992
Grant Date -
N/A
app pub date -
Oct 20, 1989
filing date -
Oct 26, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A two-piece, or articulated, piston assembly for internal combustion engines, comprising a head composed of a top portion and a pair of pin bosses integral with it, a skirt portion, and a wrist pin mounted in the pin boss holes. The pin bosses are secured to a member restraining lateral deformation of the pin bosses. The restraining member may be the wrist pin itself, or defined by a cylindrical hollow pin fastened to the pin boss holes and housing the wrist pin. The thus formed structure prevents deformation of the pin bosses toward the cylinder liner, thereby imparting a higher strength to the piston assembly.
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