Expansible chamber devices – Piston – Open-ended hollow skirt type
Reexamination Certificate
2011-04-05
2011-04-05
Lazo, Thomas E (Department: 3745)
Expansible chamber devices
Piston
Open-ended hollow skirt type
C092S159000, C092S208000, C029S888042
Reexamination Certificate
active
07918155
ABSTRACT:
A piston for an internal combustion engine is provided. The piston crown includes an interior surface that defines at least in part a cooling gallery and a cooling gallery surface within the piston. An annular surface may defines at least in part an annular passageway that allows fluid communication between an outer surface of the piston and the cooling gallery. Opposing annular surfaces may be abutted with a predetermined force, thereby limiting fluid flow from the cooling gallery to an outer surface of the piston. Further, an annular surface may extend into the cooling gallery to form a deflector along the cooling gallery surface, thereby limiting fluid flow from the cooling gallery to an outer surface of the piston.
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Gildemeister Juan
Lapp Michael T.
Sorin Stan
Walker Steve
Lazo Thomas E
Mahle International GmbH
Rader & Fishman & Grauer, PLLC
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