Extruded binary seal
AssigneeDayco Products, Inc.
InventorsJeremy Duke, Eric Frey, Kenneth Scott Jackson, John Mobley, Francis V. Rolland, Edi J. Wink
Life of this patent
Estimating the term…
Abstract
An extruded multilayer seal member having an expanded temperature range and an improved compression set resistance wherein the seal member comprises a first fluoroelastomer as the inner layer of the multilayer seal member and a second elastomer as the outer layer of the multilayer seal member; and a method for manufacturing the multilayer seal member which comprises extruding a multilayer tubular structure, crosslinking the extruded multilayer tubular structure on a mandrel, cutting the multilayer tubular structure to provide a plurality of uniform seal members and recovering the seal members, are described.
Claims13
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.
In an air intake manifold gasket for sealing an air intake manifold to an automotive engine, the improvement wherein said air intake manifold gasket is a 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 copolymer, perfluoroalkoxytetrafluoroethylene copolymer, tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride terpolymer, and blends thereof;
- and
- an outer curvilinear segment wherein said outer segment is 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 polymeric 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.
Dependencies are inferred from the claim text.