ALEXANDRIA, Va., June 5 -- United States Patent no. 12,276,272, issued on April 15.
"Diaphragm pump" was invented by Yushi Maruyama (Tokyo) and Toshihisa Nemoto (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A diaphragm pump includes a low pressure side diaphragm forming a part of a pulsation operating chamber, a high pressure side diaphragm forming a part of a pump chamber, and a connecting portion connecting the low pressure side diaphragm and the high pressure side diaphragm. The high pressure side diaphragm operates in conjunction with the low pressure side diaphragm by being connected to the low pressure side diaphragm by the connecting portion. An area of a high pressure side operating portion o...