ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,401, issued on May 5, was assigned to ZHEJIANG ELE SMART TECHNOLOGY Co. LTD. (Wenzhou, China).

"Diaphragm assembly and diaphragm pump" was invented by Hao Chen (Wenzhou, China) and Zhiyong Xu (Wenzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A diaphragm assembly includes a piston push block, a diaphragm, a middle piece, a balance wheel seat, and fasteners. The diaphragm includes a diaphragm body with protrusions which protrude toward the middle piece and extends into the balance wheel seat. The piston push block includes a piston head and a piston shaft. The piston head is located on the side of the diaphragm facing away from the middle p...