Two-part piston for an internal combustion engine

Details Two-part piston for an internal combustion engine Two-part piston for an internal combustion engine

2007-01-16

2007-01-16

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Particular piston and enclosing cylinder construction

Piston

Reexamination Certificate

active

11322189

ABSTRACT:
A two-part piston for an internal combustion engine, comprising a piston head and a piston skirt connected with the piston head in articulated manner, by way of a piston pin. The piston head has a piston crown that is followed by a cylindrical circumference surface having a top land and a ring belt. The piston head can include a ring-shaped circumferential cooling channel disposed within the piston head. The opening of this cooling channel faces the piston skirt, and is closed off with a seal element. There is a seal element that has a first free end that is held between piston head and piston skirt, or rests against an outer wall of the cooling channel. The seal element has a second free end that rests against the piston head, and wherein the seal element has a bottom that lies on a surface of the piston skirt that faces the cooling channel.

REFERENCES:
patent: 5052280 (1991-10-01), Kopf et al.
patent: 5261363 (1993-11-01), Kemnitz
patent: 5357920 (1994-10-01), Kemnitz et al.
patent: 5546896 (1996-08-01), Zaiser
patent: 6920860 (2005-07-01), Gabriel et al.
patent: 4039752 (1992-06-01), None
patent: WO 90 04094 (1990-04-01), None
patent: WO 92 10658 (1992-06-01), None
patent: WO 92 10659 (1992-06-01), None

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