ALEXANDRIA, Va., March 17 -- United States Patent no. 12,576,408, issued on March 17.
"Apparatus and method for vortex air flow material grinding" was invented by James Daniel Stollings (Charleston, W.va.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vortex air flow material grinding apparatus includes a cylindrical lower chamber with an open interior. An inverted conical-shaped upper chamber is connected to the lower chamber, and an air knife assembly is connected to an annular side wall of the lower chamber to thereby inject air into the open interior of the lower chamber and create a vortex air flow in the lower chamber that extends upward into the upper chamber. Methods for grinding a material are fur...