ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,499, issued on Jan. 13, was assigned to Proterial Ltd. (Tokyo).
"Position detection device" was invented by Yohei Shirakawa (Tokyo) and Yuta Sugiyama (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A position detection device for detecting a position of a shaft moving forward and backward in an axial direction is provided with a detection object attached to the shaft, an excitation coil for generating an alternating magnetic field, a power supply for supplying an alternating current to the excitation coil, and a detection coil arranged to be extending along an axial direction of the shaft and being interlinked with a magnetic flux of the alter...