ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,465,925, issued on Nov. 11, was assigned to CDE Global Ltd. (Cookstown, Great Britain).
"Method and apparatus for washing and grading sand" was invented by Anthony Convery (Moneymore, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of washing and grading sand includes passing sand entrained in water to a first fines separation stage having one or more hydrocyclones, passing sand from the hydrocyclone(s) into a second fines separation stage including a tank with spray bars arranged in a lower region to create an upwardly-directed flow of water in the tank. Excess water and any fine material, such as clay, is washed out of the sand p...