PISTON FOR A COMBUSTION ENGINE AND CASTING METHOD FOR THE PRODUCTION THEREOF

WIPO Patent Application WO2004111419

B1

The invention relates to a piston (1), which is comprised of an approximately circular cylindrical upper area (5) and of a lower area (6) having two hubs (7), which are set back toward the piston central axis (8) so that, in the upper area (5), recesses (12, 12') can be made, which are open toward the lower area (6), in the vicinity of the hubs (7). In order to make relief cuts (13, 13') in the area between the hubs (7) and the upper area (5), a salt mold part (15) is placed on the respective window insert (14). The salt mold part (15) serves to produce the recesses (12, 12') as well as the relief cuts (13, 13') when casting the piston (1) and is washed out after the piston (1) has been cast.

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SCHNAITMANN GOTTFRIED (DE)

PCT/DE2004/001151

April 07, 2005

June 07, 2004

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MAHLE GMBH (DE)
SCHNAITMANN GOTTFRIED (DE)

B22D15/02; B22D19/00; F02F3/00; (IPC1-7): F02F3/00; B22D15/02; B22D19/00

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