VALVE-TYPE MOTOR Russian patent published in 1996 - IPC

FIELD: instrumentation and electrical engineering, stomatology and engraving work to drive cutting tools. SUBSTANCE: motor has frame 1, armature 2 with windings 3 and rotor 4 in the form of shaft carrying permanent magnet 6, both placed coaxially in frame. Non-drive end of shaft has cavity 5. Permanent magnet 6 is placed in shaft cavity and locked in position to prevent its turning relative to its walls. Shaft is mounted on two bearings 16, 17. Outer surface of bearing 16 is engageable with frame 1. The latter has axial boss 18 located in hole of bearing 17. Outer surface of bearing 17 is engageable with shaft. EFFECT: enlarged functional capabilities. 2 dwg