US Patent Issued to Lin Engineering on Oct. 7 for "4-stator-pole step motor with passive inter-poles" (California Inventor)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,438,429, issued on Oct. 7, was assigned to Lin Engineering Inc. (Morgan Hill, Calif.).

"4-stator-pole step motor with passive inter-poles" was invented by Ted T. Lin (Saratoga, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A two-phase bipolar step motor, comprises a rotor having a plurality of pairs of rotor poles of alternating magnetic polarity, and a stator having four primary energizable stator poles with conductive windings around those primary stator poles and four passive inter-poles located uniformly between every adjacent pair of primary stator poles, the passive inter-poles lacking any conductive windings. Both 18deg steppers with five ...