ALEXANDRIA, Va., June 17 -- United States Patent no. 12,311,142, issued on May 27, was assigned to THE ESAB GROUP INC. (North Bethesda, Md.).
"Medical pin index residual pressure valve" was invented by Gareth Pemberton (Worcester, Great Britain), Karel Zmek (Chotebor, Czech Republic) and Zdenek Firych (Chotebor, Czech Republic).
According to the abstract* released by the U.S. Patent & Trademark Office: "A medical pin index valve includes a pair of pin holes, the positions of which are selected based on the particular gas to be used with the pin index valve. The pin index valve includes a residual pressure device therein. In one embodiment, the residual pressure device is designed so that it closes the valve when the pressure in the tank i...