ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,774,749, issued on Oct. 27, was assigned to BIBOTING INTERNATIONAL Co. LTD. (Taoyuan City, Taiwan).
"Air inlet adjustment structure of negative pressure regulator" was invented by Li-Pin Yuan (Taoyuan City, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A negative pressure regulator includes a regulator body, a pressure relief nut, and a swivel assembly. The regulator body includes a valve body and a cylinder connected to the valve body. The valve body includes an airflow passage. The cylinder includes a mounting hole and an air inlet communicating with the airflow passage. The pressure relief nut is disposed in the mounting hole and includes a r...