US Patent 9051088 Vacuum release seal for a closure and container package

A seal for sealing engagement between a closure and a container. A seal ring has a sealing portion. A projection is coupled to the seal ring, extends circumferentially and radially outwardly of the seal ring, and has a closure-driven feature engageable by the closure when the closure is rotated on the container in a loosening direction to unseat the seal ring from sealing engagement between the container and the closure. The seal may be part of a package and sealingly engaged between a sealing surface of a container of the package and a base of a closure of the package when the closure is secured to the container.