ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,405, issued on Feb. 10, was assigned to ZURN WATER LLC (Milwaukee).
"Check valve assembly" was invented by William M. Orr (Paso Robles, Calif.) and Michael Alan Andrew (Monona, Wis.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A check valve assembly includes a valve frame, a valve poppet, a first torsion spring, and a second torsion spring. The valve frame has an opening. The valve poppet is positionable in the opening. The valve poppet is moveable in a first direction to close the check valve assembly and moveable in a second direction to open the check valve assembly. The first torsion spring biases the valve poppet in the first direction. The s...