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US 7,802,796 B2Granted
Composite material and seals formed thereof
AssigneeSaint-Gobain Performance Plastics Corporation
InventorRobert Thomas Racicot
Life of this patent
Estimating the term…
Abstract
A seal is formed of a material including about 80.0% to about 95.0% by weight fluoropolymer, about 1.0% to about 10.0% by weight aromatic polymer, and graphite fiber.
Claims12
A seal formed of a material comprising about 80.0% to about 95.0% by weight of a modified polytetrafluoroethylene comprising at least about 0.01% by weight and not greater than 5.0% by weight perfluoropropyl vinyl ether, about 1.0% to about 10.0% by weight aromatic polymer selected from the group consisting of polyphenylene sulfide and polyphenyleneoxide, and graphite fiber.
A pump comprising:
- a rod;
- and
- a seal including a surface in contact with the rod, the seal formed of a material comprising about 80.0% to about 95.0% by weight of a modified polytetrafluoroethylene comprising at least about 0.01% by weight and not greater than 5.0% by weight perfluoropropyl vinyl ether, about 1.0% to about 10.0% by weight aromatic polymer selected from the group consisting of polyphenylene sulfide and polyphenyleneoxide, and graphite fiber.
Dependencies are inferred from the claim text.