ALEXANDRIA, Va., March 3 -- United States Patent no. 12,565,933, issued on March 3, was assigned to Bestway Oilfield Inc. (Channelview, Texas).
"Concentric valve skirts" was invented by Don Channing Gramlich (Richmond, Texas) and Mehul Jain (Humble, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A gate valve includes a valve body having a through-bore and a gate cavity, a gate disposed within the gate cavity, an annular seat pocket formed within the valve body, an annular seat disposed within the annular seat pocket, and a skirt disposed within the gate cavity and in contact with the annular seat and in contact with the surface of the gate. The skirt has an annular opening that is concentric with the a...