Piston ring and method for the production thereof

Details Piston ring and method for the production thereof Piston ring and method for the production thereof

2011-01-18

2011-01-18

Pickard, Alison K (Department: 3676)

Seal for a joint or juncture

Seal between relatively movable parts

Piston ring or piston ring expander or seat therefor

C277S443000, C277S444000

Reexamination Certificate

active

07871078

ABSTRACT:
A piston ring includes a running surface having a running surface profile, and an upper flank surface and a lower flank surface. At least the running surface is provided with a vapor-deposited layer such that part of the running surface is provided with a removable cover enabling an essentially sharp-edged running edge to be formed between the running surface and at least one of the flank surfaces, once the vapor-deposited layer has been produced and the cover has been removed.

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