ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,528,567, issued on Jan. 20.
"Second stage regulator" was invented by Chun Wei Chen (Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A second stage regulator suitable for both right-handed and left-handed divers includes a housing, a mouthpiece, a decompression mechanism, an exhaust mechanism and an airflow adjustment mechanism. The airflow adjustment mechanism can control the output air volume by adjusting the size of the vent. Even in the state of small air volume, the diver only needs to inhale a little to push the second stage output and inhale the air smoothly. The diver can control the direction of the airflow by operating the airflow...