ALEXANDRIA, Va., March 17 -- United States Patent no. 12,575,747, issued on March 17, was assigned to SHENZHEN JAMR TECHNOLOGY Co. LTD. (Shenzhen, China).
"Air control mechanism and sphygmomanometer" was invented by Yingxiang Cao (Shenzhen, China) and Liming Wang (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An air control mechanism and a sphygmomanometer including the air control mechanism are provided. The air control mechanism includes a first housing, a second housing, a tower-shaped piston, and an intake-exhaust mechanism. In an intake state, air in the first chamber sequentially flows through the flow groove, presses against the elastic thin plate, flows through the stepped hole and f...