Back to results
US 4,987,866 AGranted
Light alloy piston for internal combustion engines
AssigneeKolbenschmidt Aktiengesellschaft
InventorsSiegfried Mielke, Wilfried Weber, Werner Steidle
Life of this patent
Estimating the term…
Abstract
A light-alloy piston for internal combustion engine, is formed in the piston head with a combustion chamber recess. The stresses which are induced at the rim of the combustion chamber recess by the ignition pressure are reduced by the provision of an inwardly extending blind hole in the portions between the ring groove for the lowermost compression ring and the top apex of the bores in the piston pin bosses.
Claims14
A light alloy piston for internal combustion engines, comprising:
- a top portion including a piston head formed with a combustion chamber recess and the ring groove portion, a skirt with integrated piston pin bosses having a support and bore means forming at least one blind hole in portions disposed between a lowermost ring groove and a top apex of the bores and extending from an outside peripheral surface of the skirt inwardly on both sides of a plane which contains a piston axis and the direction of the piston pin axis.
Dependencies are inferred from the claim text.