US Patent Issued to NINGBO WANAN on Oct. 28 for "Gas negative pressure valve" (Chinese Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,455,581, issued on Oct. 28, was assigned to NINGBO WANAN Co. LTD. (Ningbo, China).

"Gas negative pressure valve" was invented by Feng Zhang (Zhejiang, China), Yunnan Wei (Zhejiang, China), Jinghui Fan (Zhejiang, China) and Hongbin Ren (Zhejiang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A gas negative pressure valve is provided which comprises a valve body and a valve cover. A gas inlet and a gas outlet are disposed on the valve body. A drive lever and a diaphragm assembly are disposed inside the valve body, and one end of the drive lever is connected to a lower end of the diaphragm assembly, and the other end of the drive lever is connected ...