ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,990, issued on Oct. 21, was assigned to GOODRICH ACTUATION SYSTEMS Ltd. (West Midlands, Great Britain).
"Two-stage servo valve" was invented by Zbigniew Jaskiewicz (Wroclaw, Poland) and Kamil Mastalerz (Wroclaw, Poland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A two-stage servo valve comprising a first drive stage and a second fluid transfer stage. The fluid transfer stage includes a housing having a plurality of ports and a spool axially moveable within an axial cavity defined within the housing to control flow of fluid between the plurality of ports according to the axial position of the spool, wherein the drive stage is configured to cause a...