Unitary hollowed piston with improved structural strength

Details Unitary hollowed piston with improved structural strength Unitary hollowed piston with improved structural strength

2005-09-13

2005-09-13

Lazo, Thomas E. (Department: 3745)

Expansible chamber devices

Relatively movable working members

Interconnected with common rotatable shaft

C092S175000

Reexamination Certificate

active

06941852

ABSTRACT:
A unitary, “hollow out” piston is molded or forged with only two tools, which move along a single parting direction, with a pair of arcuate side walls that provide maximal outer surface area with minimal thickness and weight. The thin walls are internally fortified by a cruciform support structure that is molded integrally by the same tools. No post forming machining steps are needed to reduce weight.

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