Patent ID: 7552520

Claim:
An automotive fuel system seal member for sealing an air intake manifold to an automotive engine, said automotive fuel system seal member comprising at least one annular layer of a fluoroelastomer material, said annular layer of fluoroelastomer material comprising: an outer corrugated annular surface exhibiting a plurality of longitudinal peaks and valleys; an inner corrugated annular surface parallel to said outer corrugated annular surface, said inner corrugated annular surface exhibiting a corresponding corrugated surface having a corresponding plurality of parallel peaks and valleys, wherein the distance between said outer corrugated annular surface and said inner corrugated annular surface defines the thickness of said at least one annular layer of fluoroelastomer material; a first circumferential rim surface forming a first lateral side surface perpendicular to said outer corrugated annular surface and to said inner corrugated annular surface; and a second circumferential rim surface forming a second lateral side surface parallel to said first lateral side surface, wherein the distance between said first lateral side surface and said second lateral side surface defines the width of said seal member, said seal member providing improved permeation resistance to hydrocarbon fuel vapors when used to seal a first fuel system component to a second fuel system component.