ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,816, issued on Oct. 28, was assigned to Tai-World Mfg. Co. Ltd. (Changhua, Taiwan).
"Drain valve assembly" was invented by Sen-Tien Shih (Changhua, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A drain valve assembly contains a body including a chamber, at least one rotatable stop portion, a first receiving orifice, a discharge orifice, a coupling orifice, and a second receiving orifice. A shaftless ball valve is received in the chamber and includes a fixing orifice, an opening, a first draining orifice, a second draining orifice, a third draining orifice and a stopping face. A first reinforcement ring is mounted on the upper support portion...