ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,474,724, issued on Nov. 18, 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 (1) includes: a sleeve (10) extending in an axial direction thereof, including an inlet port (11) and an outlet port for working fluid; a spool (20) movably housed in the sleeve (10) in the axial direction; a biasing device (30) including a spring (31) as a biasing member configured to press a base end (20a) of the spool (20) toward a tip end (20b) of the spool (20); and a pressure detecting port (56) for the working fluid, opening toward the tip end (20b) of the spool (20). The out...