Piston

Details Piston Piston

2005-03-08

2005-03-08

Look, Edward K. (Department: 3745)

Expansible chamber devices

Piston

Open-ended hollow skirt type

C092S208000, C092S237000

Reexamination Certificate

active

06862977

ABSTRACT:
A light weight piston for an internal combustion engine is disclosed that minimizes the stresses found in a transition area between the piston head and the associated piston pin bosses while maintaining a flexible soft connection between the piston skirts and the piston head. The piston includes a pair of piston skirts having tapered edges. Flared connecting walls are provided such that the distance between the connecting walls is minimized adjacent a pair of piston pin bosses and the distance between the connecting walls is maximized adjacent a portion of the tapered edges. The connecting wall flares in a generally outward direction such that at least a portion of the inner surfaces of the connecting wall has a generally convex curvature.

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European Search Report dated Oct. 3, 2003, for EP 1 348 859, which is the European counterpart of the above-captioned U.S. Patent Application.

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