ALEXANDRIA, Va., June 19 -- United States Patent no. 12,332,144, issued on June 17, was assigned to Billy Lawrence Jacob (Abilene, Texas).
"Check valve tester" was invented by Billy Lawrence Jacob (Abilene, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention comprises a very simple apparatus for low pressure testing of equipment used in the water industry such a backflow preventing assemblies, and in particular double check valve backflow assemblies used in the landscape irrigation industry. Testing method is simple. Connect the swivel nut located at the bottom of apparatus to the test cock of a check valve on the normal upstream side of check valve to be tested, manipulate the insolat...