Piston-pin boss of a piston for an internal combustion engine

Details Piston-pin boss of a piston for an internal combustion engine Piston-pin boss of a piston for an internal combustion engine

2007-10-09

2007-10-09

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Particular piston and enclosing cylinder construction

Piston

C092S187000

Reexamination Certificate

active

10536948

ABSTRACT:
The invention related to a piston-pin boss (18) of a piston (6) for an internal combustion engine, comprising a piston-pin bore (1) for receiving a piston pin. To improve the passage of oil and to form an oil reservoir, the interior surface (2) of the bore comprises a transversal groove (5) that lies parallel to the longitudinal axis (3) of the piston-bore (1) and opens towards the exterior of the piston and an oil circulation groove (4) that intersects the transversal groove (5) and encircles the longitudinal axis (3).

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