ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,214,359, issued on Feb. 4, was assigned to Fristam Pumps USA LP (Middleton, Wis.).
"Colloid mill" was invented by Matthew D. Eggert (Sauk City, Wis.) and Duane D. Ehlke (Waunakee, Wis.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The shear gap between a rotor and a stator in a colloid mill is adjusted by translating the stator with respect to the rotor, preferably by moving the stator along a helical path about the rotor, thereby moving the stator's surface closer to or further from the rotor's surface (and altering the shear gap therebetween). Helical slots are provided in the casing about the stator, with members extending from the stator through the...