ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,498,046, issued on Dec. 16, was assigned to IHI Corp. (Tokyo).
"Spool valve" was invented by Seiei Masuda (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A spool valve includes: a sleeve extending in an axial direction thereof, including inlet and outlet ports for working fluid; a spool housed in the sleeve; a biasing device that presses a base end of the spool toward a tip end of the spool; and a pressure detecting port opening toward the tip end. The spool includes: first and second land sections; a groove section located between the first land section and the second land section, having a width in the axial direction to connect between the inle...