ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,704,182, issued on Aug. 11, was assigned to Fisher Controls International LLC (Marshalltown, Iowa).
"Butterfly valve seal" was invented by Bryan Leger (Marshalltown, Iowa) and Wade Helfer (Marshalltown, Iowa).
According to the abstract* released by the U.S. Patent & Trademark Office: "A valve assembly can include a valve body and a seal ring. The seal ring can be seated in a seal cavity of the valve body. The seal ring can include a base that extends in an axial direction within the seal cavity, a leg that extends from the base, and a foot that extends from the leg. When a disk of the valve assembly is in a closed valve position, a primary seal can be formed between the foot and the ...