Expansible chamber devices – Piston – Open-ended hollow skirt type
Reexamination Certificate
2006-10-17
2006-10-17
Lopez, F. Daniel (Department: 3745)
Expansible chamber devices
Piston
Open-ended hollow skirt type
Reexamination Certificate
active
07121192
ABSTRACT:
A system and method for reducing microwelding of a piston ring installed in a circumferential groove of a piston, wherein the ring has at least one piston groove engaging surface which is coated with a polyaryletherketone polymer. This composition provides critical lubrication during the piston and piston ring break-in period and prevents localized high pressure, and high temperature areas that promote microwelding.
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Smith Thomas J.
Sytsma Steven J.
Dana Corporation
Lopez F. Daniel
Rader & Fishman & Grauer, PLLC
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