US Patent Issued to Nabtesco on Dec. 2 for "Spool position estimation apparatus, aircraft hydraulic actuator apparatus, spool position estimation method, and spool position estimation program" (Japanese Inventor)

ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,923, issued on Dec. 2, was assigned to Nabtesco Corp. (Tokyo).

"Spool position estimation apparatus, aircraft hydraulic actuator apparatus, spool position estimation method, and spool position estimation program" was invented by Tsutomu Yasui (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A position estimation apparatus includes: a supplying unit that supplies a high-frequency signal Sh to a solenoid for driving a spool of an electromagnetic valve; an acquisition unit that acquires electrical information Je related to the solenoid supplied with the high-frequency signal Sh, and an estimation unit that estimates a position of the spool based on...