ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,416,517, issued on Sept. 16.
"Device for dosing particulate material" was invented by Yuanhao Zhou (Pittsburgh), Zhengyang Liu (Pittsburgh) and Hong Chen (Pittsburgh).
According to the abstract* released by the U.S. Patent & Trademark Office: "A device for dosing particulate material uses multiple valve plates to collectively open or close a discharge port, so that an opening degree of the discharge port can be adjusted according to the degree to which the adjustment ends of each valve plate are gathered, thereby effectively adjusting the opening degree of the discharge port. When the amount of particulate material to be dosed is large, the opening degree of the discharge port can b...