ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,034, issued on March 17, was assigned to CKD Corp. (Komaki, Japan).
"Vacuum pressure control system" was invented by Kyouta Nakayama (Komaki, Japan) and Tetsujiro Kono (New Taipei City, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vacuum open-close valve includes a drive unit for driving a valve element based on an opening-degree command value. The drive unit includes a drive shaft connected to the valve element, a piston connected to the drive shaft at an opposite end from the valve element, a cylinder provided with a piston chamber housing the piston, and a bellofram that is retained by the piston and partitions the piston chamber. A c...