Patent ID: 7479316

Claim:
A crosslinked, extruded air intake manifold gasket for sealing an air intake manifold to an automotive engine, said crosslinked, extruded air intake manifold gasket comprising: an inner-curvilinear segment, wherein said inner curvilinear segment consists of a fluoroelastomer material selected from the group consisting of polyvinylidene tetrafluoride, polyvinylidene trifluoride, polyvinylidene difluoride, polyvinyl fluoride, polyvinylidene fluoride, polytrifluoromonochloroethylene, polytetrafluoroethylene, polyhexafluoropropylene, polydifluoroethylene, polytetrafluoroethylene, fluorosilicone, ethylene-tetrafluoroethylene copolymer, hexafluoropropylene-tetrafluoroethylene copolymer, hexafluoropropylene-difluoroethylene copolymers, perfluoroalkoxytetrafluoroethylene copolymer, tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride terpolymer, and blends thereof; and an outer curvilinear segment, wherein said outer curvilinear segment consists of a non-fluoroelastomer material selected from the group consisting of ethylene acrylic copolymer, polyacrylate, ethylene-vinyl acetate rubber, nitrile-butadiene rubber, hydrogenated nitrile-butadiene rubber, ethylene-propylene-diene terpolymer, polybutadiene, polyisoprene, silicone rubber, and blends thereof wherein said inner curvilinear segment and said outer curvilinear segment are co-planar with respect to one another, said air intake manifold gasket exhibiting wider temperature range and lower compression set resistance compared to conventional molded air intake manifold gaskets while being free of undesirable excess flashing associated with said conventional molded air intake manifold gaskets.