ALEXANDRIA, Va., April 15 -- United States Patent no. 12,600,557, issued on April 14, was assigned to APTAR FRANCE SAS (Le Neubourg, France).
"Metering valve having an improved metering chamber" was invented by Arnaud Colomb (Verneuil sur Seine, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "Metering valve having a valve body containing a metering chamber defined by a chamber insert and two annular seals, a valve seal and a chamber seal, the chamber insert having a cylindrical wall, an upper edge cooperating with the valve seal and a lower edge cooperating with the chamber seal, a valve sliding axially in the valve body between rest and dispensing positions. The valve is urged towards its rest positio...