ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,661, issued on March 31, was assigned to ASIA VITAL COMPONENTS Co. LTD. (New Taipei City, Taiwan).
"Quick coupler structure" was invented by Qiang-Fei Duan (New Taipei City, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A quick coupler structure includes a male and a female coupler. The male coupler internally receives a fixed valve core surrounded by a spring and a connecting tube for connecting to a coupling platform at an upper part of the female coupler. The connecting tube is externally provided with sealing members to enhance airtight connection with the male coupler. The coupling platform defines a central thru-hole with a movable va...