Seal for a joint or juncture – Seal between relatively movable parts – Circumferential contact seal for other than piston
Reexamination Certificate
2006-02-23
2011-12-13
Pickard, Alison (Department: 3674)
Seal for a joint or juncture
Seal between relatively movable parts
Circumferential contact seal for other than piston
C277S559000, C277S589000, C277S652000
Reexamination Certificate
active
08075000
ABSTRACT:
A composite, dynamic seal suitable for use in a high temperature environment and method of making same. The dynamic seal includes a resilient, generally ring-shaped seal body having a first layer formed of a first resilient sealing material and a second layer formed of a second resilient sealing material. The first and second layers are preferably molded and cured together simultaneously and chemically cross-linked to each other. The first resilient sealing material is selected for its wear resistant dynamic properties and the second resilient sealing material is selected for its compression set resistant properties. Preferably, the first resilient sealing material is tetrafluoroethylene and propylene copolymer and the second resilient sealing material is fluorocarbon rubber. The first and second resilient sealing materials have compatible cure systems, preferably peroxide cure systems.
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Dietle Lannie L.
James Brian A.
Richardson Rome
Schroeder John E.
Andrews & Kurth LLP
Kalsi Engineering, Inc.
Pickard Alison
Rommelmann Douglas W.
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