ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,988, issued on Nov. 18, was assigned to Reliance Worldwide Corp. (Atlanta).
"Excess flow valve and system" was invented by Michael Christopher Tracz (Brecksville, Ohio), Joseph Jerome Spalding (Elyria, Ohio) and Jason Thomas Kocher (Chardon, Ohio).
According to the abstract* released by the U.S. Patent & Trademark Office: "An excess flow valve (EFV) is disclosed that has an efficient and durable construction. The EFV is efficient in terms of both size and cost. It is durable partly due to a design with few parts and also because of optional all metal construction. In some embodiments, an intumescent material is included that expands to close off the valve by pressing the valve pl...